US20150351732A1 - Apparatus and methods for sealing a puncture in tissue - Google Patents
Apparatus and methods for sealing a puncture in tissue Download PDFInfo
- Publication number
- US20150351732A1 US20150351732A1 US14/801,081 US201514801081A US2015351732A1 US 20150351732 A1 US20150351732 A1 US 20150351732A1 US 201514801081 A US201514801081 A US 201514801081A US 2015351732 A1 US2015351732 A1 US 2015351732A1
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- Prior art keywords
- lumen
- fluid
- occlusion
- puncture
- tubular member
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
- A61B2017/00637—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect for sealing trocar wounds through abdominal wall
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/0057—Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect
- A61B2017/00646—Type of implements
- A61B2017/0065—Type of implements the implement being an adhesive
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M2025/1043—Balloon catheters with special features or adapted for special applications
- A61M2025/1068—Balloon catheters with special features or adapted for special applications having means for varying the length or diameter of the deployed balloon, this variations could be caused by excess pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/1018—Balloon inflating or inflation-control devices
- A61M25/10181—Means for forcing inflation fluid into the balloon
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/1018—Balloon inflating or inflation-control devices
- A61M25/10181—Means for forcing inflation fluid into the balloon
- A61M25/10182—Injector syringes
Definitions
- Apparatus and methods are known for accessing a patient's vasculature percutaneously for performing a procedure within the vasculature.
- a hollow needle may be inserted through a patient's skin and overlying tissue into a blood vessel.
- a guidewire is then passed through the needle into the blood vessel, whereupon the needle is removed.
- An introducer sheath is then advanced over the guidewire into the vessel, e.g., in conjunction with or subsequent to one or more dilators.
- a catheter or other device may be advanced through the introducer sheath and over the guidewire into a position for performing a medical procedure within the patient's body. In this manner, the introducer sheath facilitates introducing various instruments into the vessel, while minimizing trauma to the vessel wall and blood loss.
- the fluid dispensing device may be removably coupled to the occlusion member, e.g., for delivering fluid from the fluid dispensing device into a lumen of the occlusion member.
- the introducer sheath may include a proximal end, a distal end sized and shaped for insertion into the puncture, and a lumen extending between the proximal end and an opening in the distal end.
- a lubricous, low-friction, or other coating may be applied to an exterior surface of the piston 60 , e.g., on at least the distal end 64 .
- a similar or different coating may be applied to at least a portion of an interior surface of the wire member 50 . The coating may reduce or increase the force needed to cause axial movement of the piston 60 within the lumen 56 of the wire member 50 , depending upon the resistance desired.
- the system 10 may also include a source of sealing compound 14 , such as a dual syringe assembly 40 or other delivery device (not shown), e.g., that includes two components of a sealing compound.
- a source of sealing compound 14 such as a dual syringe assembly 40 or other delivery device (not shown), e.g., that includes two components of a sealing compound.
- the syringe assembly 40 includes a pair of syringe barrels 42 , including outlets 43 and a plunger assembly 44 slidable into the barrels 42 to cause the components therein to be delivered through the outlets 43 .
- the plunger assembly 44 includes a pair of plungers 45 coupled to one another that are received in respective barrels 42 . In this manner, both plungers 45 may be manually depressed substantially simultaneously to deliver the components together from the syringe barrels 42 .
- the needle may be removed, and the balloon 58 may be expanded within the vessel 94 .
- the retaining sheath 17 may be retracted completely (or only partially) out of the puncture 90 to expose the balloon 58 within the vessel 84 .
- the delivery sheath 12 may be retracted as the sealing compound 99 is delivered, e.g., to fill the puncture 90 along its length.
- Additional apparatus and methods for delivering the sealing compound 99 into the puncture 90 around the occlusion member 16 are disclosed in co-pending application Ser. Nos. 10/454,362 and 10/745,946, incorporated above, or in co-pending application Ser. No. 10/975,205, filed Oct. 27, 2004, the entire disclosure of which is expressly incorporated by reference herein.
- the wire member 150 may be substantially flexible or semi-rigid, e.g., to allow the wire member 150 to curve, bend, or otherwise adapt to anatomy through which it is advanced, yet have sufficient column strength to accommodate advancing the distal end 154 by pushing on the proximal end 152 .
- the wire member 150 may be formed from one or more wire coil(s) (not shown) wound into an elongate tubular shape, optionally, including applied to the wire coil(s) to create a substantially nonporous wall or may be formed from a solid-walled tube, similar to the previous embodiment.
- the balloon 158 may be expandable from a collapsed state (such as that shown in FIG. 5B ) to an enlarged state (such as that shown in FIG. 5A ), e.g., by introducing fluid into an interior 159 of the balloon 158 .
- the balloon 158 may be formed from a flexible, substantially inelastic material, e.g., to provide a substantially noncompliant or semi-compliant balloon 159 that expands to a predetermined size, or the balloon 158 may be formed from an elastic material, such that the size of the balloon 158 depends upon the pressure or volume of fluid delivered into the balloon 158 .
- the proximal end 152 of the wire member 150 is substantially closed, e.g., by providing a plug, sealant, glue, or other seal material in the proximal end 152 .
- the proximal end 152 may be capped using a cap or other element (not shown).
- the lumen 156 may be substantially isolated from the region surrounding the wire member 150 .
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- Heart & Thoracic Surgery (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Public Health (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Cardiology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Hematology (AREA)
- Anesthesiology (AREA)
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- Media Introduction/Drainage Providing Device (AREA)
Abstract
An occlusion device for sealing a puncture through tissue includes a tubular wire member having a proximal end, a distal end sized for insertion into the puncture, a lumen extending between the proximal and distal ends, a port adjacent the proximal end communicating with the 5 lumen, and a balloon on the distal end. A source of fluid is connectable to the wire member for delivering fluid via the port into the lumen for expanding the balloon. A fluid loading device is disposed on the proximal end of the wire member to receive the source of fluid and to deliver fluid within the lumen into the balloon to expand the balloon.
Description
- This application is a continuation of co-pending application Ser. No. 11/112,877, filed Apr. 22, 2005, issuing as U.S. Pat. No. 8,002,742, the entire disclosure of which is expressly incorporated by reference herein.
- The present invention relates generally to apparatus and methods for sealing punctures in a body, to apparatus and methods for facilitating access through a puncture extending through tissue, and, more particularly, to apparatus and methods for deploying an occlusion element, such as a balloon or other expandable member, disposed on a guidewire or other flexible elongate member, to seal a puncture through tissue.
- Apparatus and methods are known for accessing a patient's vasculature percutaneously for performing a procedure within the vasculature. For example, a hollow needle may be inserted through a patient's skin and overlying tissue into a blood vessel. A guidewire is then passed through the needle into the blood vessel, whereupon the needle is removed. An introducer sheath is then advanced over the guidewire into the vessel, e.g., in conjunction with or subsequent to one or more dilators. A catheter or other device may be advanced through the introducer sheath and over the guidewire into a position for performing a medical procedure within the patient's body. In this manner, the introducer sheath facilitates introducing various instruments into the vessel, while minimizing trauma to the vessel wall and blood loss.
- Upon completing the procedure, the instrument(s) and introducer sheath are removed, leaving a puncture extending between the skin and the vessel. To seal the puncture, external pressure may be applied to the overlying tissue, e.g., manually and/or using sandbags, until hemostasis occurs. This procedure, however, can be time consuming and expensive, requiring as much as an hour of a medical professional's time. It is also uncomfortable for the patient, and may require the patient to remain immobilized in an operating room, catheter lab, or holding area. In addition, a risk of hematoma exists from bleeding before hemostasis occurs.
- Various apparatus and methods have been suggested for sealing a percutaneous puncture instead of or in addition to using external pressure. For example, U.S. Pat. No. 5,108,421 to Fowler discloses using a collagen plug that is delivered into a puncture through tissue. After completing the procedure, the introducer sheath and/or guidewire used to access the patient's vasculature via the puncture are removed. In one embodiment, a catheter is inserted through the puncture into the blood vessel. A balloon on the catheter is expanded and then retracted until the balloon is disposed adjacent the puncture at the wall of the vessel. A plug is then advanced into the puncture until the plug contacts the balloon, thereby preventing the plug from entering the vessel. Once the plug is positioned within the puncture, the balloon is deflated and withdrawn, leaving the plug to expand and seal the puncture and/or promote hemostasis.
- By way of another example, U.S. Pat. Nos. 5,192,302 and 5,222,974 issued to Kensey et al. describe using a collagen plug that may be delivered through an introducer sheath into a puncture site.
- Such sealing methods generally involve introducing plugs or other materials into the puncture after completing the procedure and removing the introducer sheath. With the introducer sheath removed, there is substantial risk of hematoma within the tissue surrounding the puncture as blood from the vessel leaks into the puncture, which may be uncomfortable and/or harmful to the patient. Further, temporary hemostasis devices for isolating the vessel from the puncture may be difficult to use effectively and/or may be expensive. Despite attempts to isolate the vessel from the puncture while delivering a plug or other sealing material, the sealing material may still leak and/or become exposed in the vessel, where the sealing material may risk causing an embolism in the vessel.
- The present invention is directed generally to apparatus, systems, and methods for facilitating access through a puncture through tissue, e.g., extending from a patient's skin to a blood vessel or other body lumen, and/or for sealing such punctures. More particularly, apparatus and systems are provided that include a guidewire or other elongate tubular member having a balloon or other expandable member thereon, and methods for using such tubular members are also provided.
- Generally, the expandable member may be expanded and/or collapsed by moving a piston within the tubular member to direct fluid into and/or out of the expandable member. In addition or alternatively, the expandable member may be inflated and/or deflated using a fluid dispensing device communicating with the lumen of the tubular member, e.g., that may be removably coupled to the tubular member.
- In one embodiment, an occlusion member is provided for sealing a puncture. Generally, the occlusion member includes an elongate tubular member including a proximal end, a distal end, a lumen extending at least partially between the proximal and distal ends, and an expandable occlusion element disposed on a distal region of the tubular member. A piston may extend from and/or be movable within the lumen of the tubular member for directing fluid within the lumen into and/or out of the occlusion member. Such that movement of the piston relative to the tubular member may inflate and expand and/or deflate and collapse the occlusion element.
- In another embodiment, a balloon wire device is provided for sealing a puncture through tissue. Generally, the device includes an elongate tubular or wire member including a proximal end, and a distal end sized and shaped for insertion into a puncture through tissue, e.g., having a profile similar to a conventional guidewire. The device includes a lumen extending axially through the wire member, and a balloon or other expandable member on a distal region of the wire member. The wire member may include one or more openings, e.g., in a proximal region of the wire member, that communicates with the lumen.
- Optionally, the device may include a fluid dispensing device removably coupled to the wire member. When the fluid dispensing device is coupled to the device, fluid may be directed from the fluid dispensing device into lumen of the wire member via the opening(s) in the proximal end of the wire member. In one embodiment, the device may include a piston or other element movable within the wire member for facilitating delivery of the fluid and/or for expanding and/or collapsing the expandable member.
- In another embodiment, a wire may be disposed inside the lumen having a first end affixed to the proximal end of the wire member and a second end affixed to the occlusion member. As the occlusion member is expanded, e.g., by delivering fluid into the occlusion member via the lumen of the wire member, the wire may be subjected to a compressive stress, causing the wire to buckle. Conversely, as the occlusion member is collapsed, e.g., by evacuating the fluid, the wire may extend axially to release the buckling stress, thereby extending the occlusion member as it collapses. In one embodiment, the wire may be formed from an elastic or superelastic material, allowing the wire to resiliently buckle and extend.
- In yet another embodiment, a system is provided for introducing one or more instruments into a body lumen of a patient through a puncture extending from the patient's skin to the body lumen. Generally, the system includes a balloon wire or other occlusion member, such as those described above. In addition, the system may include a fluid dispensing device, an assembly for delivering a sealing compound into the puncture, and/or an introducer sheath.
- The fluid dispensing device may be removably coupled to the occlusion member, e.g., for delivering fluid from the fluid dispensing device into a lumen of the occlusion member. The introducer sheath may include a proximal end, a distal end sized and shaped for insertion into the puncture, and a lumen extending between the proximal end and an opening in the distal end.
- In accordance with another embodiment, a method is provided for sealing a puncture in a vessel using an occlusion member including an elongate tubular or wire member having a proximal end, a distal end, a lumen extending at least partially therebetween, and an expandable occlusion member on a distal region of the tubular member.
- Generally, the distal end of the tubular member is introduced into a puncture through tissue with the occlusion member collapsed, e.g., until the occlusion member is disposed within a body lumen communicating with the puncture. A piston within the tubular member is moved to deliver fluid within the tubular member into the occlusion member, causing the occlusion member to expand. The tubular member may be at least partially retracted until the expanded occlusion member substantially seals the body lumen from the puncture.
- In another embodiment, a method is provided for sealing a puncture in a wall of a blood vessel or other body lumen using an occlusion member including an elongate tubular member and an expandable occlusion member on a distal region of the tubular member. A fluid dispensing device may be coupled or otherwise provided on a proximal end of the tubular member. The distal end of the tubular member may be introduced through the puncture with the occlusion member collapsed. Fluid may be dispensed into the tubular member from the fluid dispensing device to expand the occlusion member. The expanded occlusion member may be retracted against the wall of the body lumen to substantially seal the puncture.
- In accordance with still another aspect of the invention, a method is provided for preparing an occlusion member, the occlusion member comprising an elongate tubular member including a proximal end, a distal end having an inflatable occlusion element thereon, a lumen extending between the proximal and distal ends communicating with an interior of the occlusion element, and an opening at an intermediate location on the tubular member communicating with the lumen. In one embodiment, the method includes advancing a distal end of an elongate member into the proximal end of the tubular member until the distal end of the elongate member is disposed proximal to the opening and a proximal end of the elongate member extends proximally from the tubular member; evacuating air from within the lumen and the interior of the occlusion member via the opening; delivering a substantially incompressible inflation media into the lumen without substantially expanding the occlusion element; and advancing the distal end of the elongate member distally beyond the opening to substantially isolate the lumen with the fluid therein without substantially expanding the occlusion element. The method may further include advancing the elongate member distally within the tubular member to expand the occlusion element.
- Other aspects and features of the invention will become apparent from consideration of the following description taken in conjunction with the accompanying drawings.
- The drawings illustrate exemplary embodiments of the invention, in which:
-
FIG. 1 is a side view of a system for sealing a puncture, including an introducer sheath, an occlusion member, a delivery sheath, and a syringe assembly for delivering sealing compound via the delivery sheath. -
FIGS. 2A and 2B are cross-sectional side views of the occlusion member ofFIG. 1 , showing a method for assembling the occlusion member. -
FIGS. 2C and 2D are cross-sectional details of the occlusion member ofFIG. 1 , showing a fluid dispensing device for delivering fluid into a wire member of the occlusion member. -
FIGS. 3A-3C are cross-sectional views of a patient's body, illustrating a method for delivering a sealing compound a puncture extending between the patient's skin and a blood vessel. -
FIGS. 4A-4C are cross-sectional views of a patient's body, showing a method for delivering a sleeve and introducer sheath into the puncture ofFIGS. 3A-3C after delivering a sealing compound therein. -
FIGS. 5A and 5B are cross-sectional side views of another embodiment of an occlusion member including a balloon in an expanded (i.e., deployed) state and a collapsed (i.e., un-deployed) state, respectively. -
FIG. 6 is a cross-sectional side view of a fluid dispensing device and associated syringe for inflating and/or deflating the balloon ofFIGS. 5A and 5B . - Turning to the drawings,
FIG. 1 shows an exemplary embodiment of a system 10 for accessing and/or delivering sealing compound into a puncture through tissue, e.g., a percutaneous puncture communicating from a patient's skin through intervening tissue to a blood vessel or other body lumen (not shown). Generally, the system 10 includes a delivery orinjection sheath 12, a source of sealingcompound 14, and anocclusion member 16. Optionally, the system 10 may include other components, e.g., an introducer or procedure sheath 18 (separate from the delivery sheath 12), and one or more dilators (anexemplary dilator 19 being shown). The system 10 may also include one or more of a needle for creating the puncture, a guidewire, and/or one or more sections of tubing (not shown). In addition or alternatively, the system 10 may include other components for creating the puncture, introducing thedelivery sheath 12 and/or guidewire into a body lumen, and/or accessing the vessel, e.g., for introducing instruments (not shown) into the vessel via the puncture. - Generally, the
delivery sheath 12 is an elongate tubular member, including aproximal end 22, adistal end 24, and a primary orguidewire lumen 26 extending between the proximal and distal ends 22, 24. In addition, thedelivery sheath 12 may include one or more secondary orinjection lumens 30 that extend from theproximal end 22 to one or more outlets (e.g., twooutlets 31, as shown) in the wall of thedelivery sheath 12. - As shown, a single
secondary lumen 30 is disposed concentrically around theprimary lumen 26. Alternatively, one or more secondary lumens (not shown) may be formed or otherwise provided in the wall of thedelivery sheath 12, e.g., in a side-by-side arrangement. Theprimary lumen 26 may be of sufficient size to accommodate sliding a guidewire therethrough, e.g., between about 0.014 and 0.018 inch (0.35-0.45 mm) diameter, while thesecondary lumen 30 may be of sufficient size to accommodate delivering sealing compound therethrough. - The
secondary lumen 30 extends from ahousing 28 on theproximal end 22 of thedelivery sheath 12 to anintermediate portion 25 between the proximal and distal ends 22, 24. As shown, theintermediate portion 25 tapers where thesecondary lumen 30 terminates, with thedelivery sheath 12 having a smaller diameter from theintermediate portion 25 to the distal end 24 (e.g., since only theprimary lumen 26 extends along this portion of the delivery sheath 12). The smaller diameter distal portion may have a desired length, e.g., at least about five millimeters (5 mm). The outlet(s) 31 may be provided on theintermediate portion 25, e.g., where thedelivery sheath 12 tapers, which may facilitate directing the sealing compound delivered through thesecondary lumen 30 radially outwardly away from thedelivery sheath 12. - The
housing 28 may be attached to or otherwise provided on theproximal end 22 of thedelivery sheath 12. Thehousing 28 may include one or more side ports (e.g., oneside port 32, as shown) that communicate with an interior of thehousing 28 and thesecondary lumen 30 of thedelivery sheath 12. Thehousing 28 may include one ormore seals 29 to seal the interior of thehousing 28, e.g., such that sealing compound delivered from theside port 32 may be directed through thesecondary lumen 30. Optionally, thehousing 28 may also include one or more seals (not shown), e.g., a hemostatic seal, for sealing theprimary lumen 26 while accommodating inserting a needle, guidewire, occlusion member, or other instrument (not shown) into thelumen 26, e.g., preventing bodily fluids, such as blood, from escaping proximally through thedelivery sheath 12, as is known in the art. - A section of
flexible tubing 36 may be connected to or otherwise extend from theside port 32 to aluer lock adapter 38, a manual shut-off valve (not shown), and/or other connector (also not shown), e.g., to facilitate connecting tubing and the like (also not shown) to theside port 32. For example, a source of sealing compound, such as the dual-syringe assembly 40 described below, may be connected to theluer lock adapter 38 before or during a procedure. - In alternative embodiments, the delivery sheath may be a tubular member including a single lumen (not shown), which may include a hub, side port, and/or other components, similar to the embodiment described above. Additional infatuation on such delivery sheaths may be found in co-pending application Ser. No. 10/454,362, filed Jun. 4, 2003 and Ser. No. 10/745,946, filed Dec. 24, 2003. The entire disclosures of these references and any others cited therein are expressly incorporated herein by reference.
- Returning to
FIG. 1 , theocclusion member 16 may include an elongate wire member or othertubular body 50 carrying a balloon or otherexpandable member 58. Thewire member 50 generally includes aproximal end 52, adistal end 54, and alumen 56 extending at least partially between the proximal and distal ends 52, 54. Thewire member 50 may have an outer diameter of about 0.008 to 0.038 inch, e.g., not more than about 0.40 inch. Thewire member 50 may be substantially flexible or semi-rigid, e.g., to allow thewire member 50 to curve, bend, or otherwise adapt to anatomy through which it is advanced, yet have sufficient column strength to accommodate advancing thedistal end 54 by pushing on theproximal end 52. - In one embodiment, the
wire member 50 may be formed from one or more wire coil(s) (not shown) wound into an elongate tubular shape, similar to a guidewire. The wire coil(s) may be formed from one or more substantially round, square, or flat wires, e.g., made from stainless steel, Nitinol, or other metal. Thus, thewire member 50 may be substantially flexible yet may be pushed form theproximal end 52 without substantial risk of kinking or buckling. - The
wire member 50 may include material applied to the wire coil(s), e.g., a polymer or other coating, to create a substantially nonporous wall such that fluid may be contained within thelumen 56 without substantial leaking. For example, a liquid polymer or other material may be applied to the outer and/or inner surfaces of the wire coil(s), e.g., by dipping the entire wire coil(s), brushing, and/or spraying material onto the coiled wire(s), or by applying a coating to the wire(s) using such methods before the wire(s) are formed into the wire coil(s). If appropriate, the coating material may be cured or otherwise solidified using known procedures. Thus, coating material may have sufficient flexibility to allow the wire coil(s) to flex as thewire member 50 bends while maintaining the coating integrity and nonporous wall. - In another embodiment, the
wire member 50 may be formed from a solid-walled tube, such as a section of thin-walled hypo-tube. Exemplary materials for thewire member 50 include stainless steel, Nitinol, or other metal, polyimide or other plastic tubing, and/or composite materials. - Returning to
FIG. 1 , with additional references toFIGS. 2A and 2B , theballoon 58 may be expandable from a collapsed state (such as that shown inFIG. 1 ) to an enlarged state (such as that shown inFIG. 3A ). For example, saline, air, or other fluid may be introduced into an interior 59 of theballoon 58 to expand theballoon 58 from the collapsed state to the enlarged state. - In one embodiment, the
balloon 58 may be formed from a flexible, substantially inelastic material, e.g., a nonelastomeric material, such as PET, nylon, polyethylene, polyurethane, PEBAX, and the like. Thus, theballoon 58 may be substantially noncompliant or semi-compliant, thereby expanding to a predetermined size once a minimum pressure is introduced into the interior 59 of theballoon 58. Alternatively, theballoon 58 may be formed from an elastic material, such that the size of theballoon 58 in the expanded state is dependent upon the pressure or volume of fluid delivered into theballoon 58. Additional information on balloons that may be used are disclosed in co-pending application Ser. No. 10/454,362, incorporated above, and Ser. No. 10/806,927, filed Mar. 22, 2004, the entire disclosure of which is also expressly incorporated herein by reference. - As shown in
FIG. 2A , theballoon 58 may be an enclosed expandable body with anopen end 58 a. Theopen end 58 a may be attached to thedistal end 54 of thewire member 50 such that theballoon 58 extends distally from thedistal end 54 of thewire member 50. For example, theend 58 a may be bonded to thedistal end 54 and/or may be attached using a band (not shown) secured around thedistal end 54 and theopen end 58 a of theballoon 58. The interior 59 of theballoon 58 thereby communicates with thelumen 56 of thewire member 50 such that fluid from thelumen 56 may be used to expand theballoon 58, as explained further below. Alternatively, as seen inFIGS. 5A and 5B , anocclusion member 116 may include aballoon 158 disposed proximal to adistal tip 155 of theocclusion member 116, as described further below. - Returning to
FIG. 1 , with additional reference toFIGS. 2A-2C , thewire member 50 may include one or more ports orother openings 53 located in an intermediate region of thewire member 50. The port(s) 53 may simply be one or more holes fowled in the side wall of thewire member 50, e.g., by laser cutting, drilling, etching, and the like. The port(s) 53 communicate with thelumen 56, e.g., allowing a fluid source (not shown) to communicate with thelumen 56 from the outside environment surrounding thewire member 50. - The
wire member 50 also includes a rod, tube, orother piston 60 slidable into and out of thelumen 56 from theproximal end 52 of thewire member 50. Thepiston 60 may be an elongate member including aproximal end 62, and adistal end 64 that is axially moveable within thelumen 56 of thewire member 50. Thepiston 60 may be pushed or pulled, e.g., to either advance or retract thedistal end 64 within thelumen 56 of thewire member 50. - The
piston 60 may be formed from a substantially flexible or semi-rigid material, similar to thewire member 50, e.g., having sufficient column strength to allow thedistal end 64 to be advanced into thewire member 50 by pushing on theproximal end 62. For example, thepiston 60 may be an elongate wire coil, similar to thewire member 50, or alternatively a solid wire or other filament. In one embodiment, thepiston 60 may have a substantially uniform profile along its entire length, e.g., having a diameter between about 0.005 to 0.035 inch, such that thedistal end 64 may be slidably received in thelumen 54 of thewire member 50. - Optionally, a lubricous, low-friction, or other coating (not shown) may be applied to an exterior surface of the
piston 60, e.g., on at least thedistal end 64. In addition or alternatively, a similar or different coating (also not shown) may be applied to at least a portion of an interior surface of thewire member 50. The coating may reduce or increase the force needed to cause axial movement of thepiston 60 within thelumen 56 of thewire member 50, depending upon the resistance desired. - A fluid-tight seal may also be provided between the
piston 60 and thewire member 50, e.g., to substantially seal thelumen 56 of thewire member 50 such that fluid within thelumen 56 may not leak between thewire member 50 and thepiston 60, e.g., proximally out theproximal end 52 of thewire member 50. For example, as shown in FIGS. 1 and 2A-2D, aseal 68 may be provided on thedistal end 64 of thepiston 60, e.g., attached to thedistal end 64 and/or disposed on an exterior of thepiston 60 at or adjacent thedistal end 64. In addition or alternatively, aseal 57 may be provided on an interior surface of thewire member 50. Theseals 57 and/or 68 may provide a fluid-tight seal inside thewire member 50 to retain fluid within thelumen 56 andballoon 58 once thedistal end 64 of thepiston 60 has moved distally past the port(s) 53, as described further below. - Optionally, as seen in
FIG. 1 , theocclusion member 16 may also include a retaining sheath orother constraint 17 slidable over thewire member 50, e.g., for maintaining theballoon 58 in its collapsed condition and/or for facilitating advancing theocclusion member 16 into a puncture through tissue. For example, the retainingsheath 17 may be an elongate tubular member including proximal and distal ends, and a lumen extending therebetween. A hub may be located on the proximal end, e.g., to facilitate manipulating the retainingsheath 17. The retainingsheath 17 may have a diameter or other size to allow the distal end to be inserted into and/or through theprimary lumen 26 of thedelivery sheath 12. The hub of the retainingsheath 17 may be larger than the size of theprimary lumen 26, e.g., to provide a stop limiting distal advancement of the retainingsheath 17 into thedelivery sheath 12. The retainingsheath 58 may be sufficiently flexible to conform to the surrounding anatomy, e.g., when the retainingsheath 58 is inserted into or removed from a puncture, e.g., along with other components. - Referring to
FIG. 2A , in one embodiment, thewire member 50 may include a taperedregion 55 located proximal to theballoon 58. Correspondingly, thedistal end 64 of thepiston 60 may include a shoulder or tapereddistal tip 66 angled to conform to the taperedregion 55 of thewire member 50. The taperedregion 55 may act as an abutment to limit advancement of thepiston 60 within thewire member 50. In addition, theshoulder 66 may engage the taperedregion 55, e.g., by friction or interference fit, to restrict proximal movement of thepiston 60 relative to thewire member 50, as explained further below. - Further, this configuration may provide tactile feedback to the user, e.g., that the
balloon 58 has been fully expanded. For example, the taperedregion 55 may be provided a predetermined distance from the port(s) 53, thereby defining a volume of fluid within thelumen 56 that may be directed into theballoon 58 when thedistal end 64 of thepiston 60 is advanced from its loaded position (described below) into engagement with the taperedregion 55. The volume that is displaced may be determined to be the desired volume for sufficiently inflating and expanding theballoon 58. - In alternative embodiments, the
piston 60 and/orwire member 50 may include other lock elements (not shown) for securing thepiston 60 relative to thewire member 50. For example, thepiston 60 may include one or more ramps, tabs, or other detents (not shown), e.g., on thedistal end 64, and thewire member 50 may include one or more mating ramps, tabs, or other detents (also not shown), e.g., within thelumen 56. When thepiston 60 is advanced a predetermined distance into thewire member 50, e.g., until thedistal end 64 of thepiston 60 is disposed adjacent to thedistal end 54 of thewire member 50 but proximal to theballoon 58, the detents may interlock, preventing thepiston 60 from being withdrawn proximally. - For example, the lock element(s) may act as a ratchet, e.g., allowing the
piston 60 to be advanced distally but not retraced proximally until a final distal position is attained. Such lock element(s) may also provide tactile and/or audio feedback to the user, allowing the user to determine when thepiston 60 has reached a desired position, e.g., corresponding to complete expansion of theballoon 58, as described further below. Optionally, the lock element(s) may be overcome by pulling on thepiston 60, e.g., using a predetermined force sufficient to disconnect or even break the lock securing thepiston 60. Once the lock is broken, the lock elements may prevent thepiston 60 from being reinserted into thewire member 50, e.g., to prevent reuse of theocclusion member 16. - Turning to
FIGS. 2C and 2D , a fluid loading device orhousing 70 is shown for loading fluid into thelumen 56 of thewire member 50. In the embodiment shown, thefluid loading device 70 includes a barrel orother housing 71 including first and second ends 72, 74, and alumen 76 extending between the first and second ends 72, 74. Thehousing 71 also includes aside port 77 communicating with thelumen 76. In addition, thefluid loading device 70 includes a source of vacuum and/or a source of fluid, such as one or more syringes (onesyringe 78 shown) connectable to theside port 77 bytubing 79. The fluid within thesyringe 78 may be a substantially incompressible liquid, such as water, saline, and the like, or a gas, such as air, nitrogen, carbon dioxide, and the like. - The
housing 71 has a size such that thehousing 71 may be received around theocclusion member 16, e.g., by inserting one end of thewire member 50 into thelumen 76 of thehousing 70. Thehousing 71 may include one or more seals to provide a fluid-tight seal between thehousing 71 and thewire member 50. As shown, thehousing 71 includes anannular seal housing 71, i.e., extending from an internal surface of thehousing 71 against the external surface of thewire member 50. - Turning to
FIGS. 2A-2D , a method is shown for loading fluid into theocclusion member 16 using thefluid loading device 70, e.g., before or during a medical procedure. As shown inFIG. 2A , thewire member 50 andpiston 60 may be provided separately initially, e.g., in a kit along with one or more other components of the system 10, such as thefluid loading device 70 and/or the other components described herein. Alternatively, theocclusion member 16 may be provided at least partially assembled, e.g., using one of the procedures described below, which may be performed at a manufacturing location or at one or more other locations between the original manufacturing facility and the site of a procedure where theocclusion member 16 may be used. - Turning to
FIG. 2B , theocclusion member 16 may be assembled by inserting thedistal end 64 of thepiston 60 into theproximal end 52 of thewire member 50. Consequently, thepiston 50 may be directed into thelumen 56, e.g., until thedistal end 64 of thepiston 60 is located proximal to the port(s) 53 in thewire member 50. - The
housing 71 of thefluid loading device 70 may then be directed over thewire member 50. Theseals housing 71 may slide along the exterior surface of thewire member 50 as thehousing 71 is directed along thewire member 50. When thehousing 71 overlies the port(s) 53, theseals lumen 76 of thehousing 71, and consequently theside port 77, communicate with thelumen 56 of thewire member 50 via the port(s) 53. Alternatively, thepiston 60 may be advanced into thewire member 50 after thehousing 71 is placed around thewire member 50 over the port(s) 53, e.g., until thedistal end 64 is disposed proximal to the port(s) 53. - With the
housing 71 andpiston 60 loaded on and in thewire member 50, thelumen 56 of thewire member 50 may contain air or other gases. These gases may be evacuated from thelumen 56 by connecting a source of vacuum to theside port 77 of thehousing 71. For example, asyringe 78 may be connected, e.g., bytubing 79 to theside port 77. Thesyringe 78 may then be drawn to substantially aspirate the air from within thelumen 56 of thewire member 50. Alternatively, a vacuum line and the like (not shown) may be used to evacuate the air out of thelumen 56 andballoon 58. Once the air is evacuated from thelumen 56, a valve (not shown) on thetubing 79 or a connector on the side port 77 (not shown) may be closed to maintain the vacuum within thelumen 56. - A source of fluid, e.g., another syringe filled with fluid (represented by
syringe 78, although a different syringe may be used), may be coupled to theside port 77, e.g., viatubing 79 for delivering fluid into thelumen 56 of thewire member 50. Thesyringe 78 may be depressed to deliver sufficient fluid into thelumen 56 via the port(s) 53 to substantially fill thelumen 56. The fluid is preferably delivered into thelumen 56 in such a manner so as to not cause deployment or expansion of theballoon 58, i.e., such that theballoon 58 remains substantially collapsed. - Once the
lumen 56 has been sufficiently filled with fluid, thepiston 60 may be advanced distally until thedistal end 64 is disposed distal to the port(s) 53. Because of theseal 68 on thepiston 60, thelumen 56 andinterior 59 of theballoon 58 may become substantially isolated from the port(s) 53 and therefore from the surroundings around thewire member 50. Thehousing 71 may then be removed from around thewire member 50, e.g., by sliding thehousing 71 down and off the end of thewire member 50, without fluid leaking. - The
piston 60 may only be advanced a relatively short distance, e.g., such that theseal 68 is located just beyond the port(s) 53. This may minimize any expansion of theballoon 58, which may occur as thepiston 60 displaces fluid within thelumen 56 into the interior 59 of theballoon 58. In addition or alternatively, the volume of fluid delivered into thelumen 56 using thefluid loading device 70 may be reduced slightly, i.e., to maintain a slight vacuum within thelumen 56. When thedistal end 64 of thepiston 60 is advanced past the side port(s) 53, the volume displaced may correspond to the residual vacuum. This may reduce the risk of theballoon 58 expanding undesirably when thepiston 60 is advanced to isolate thelumen 56. - Optionally, as shown in
FIG. 2B , theocclusion member 16 may include alocking device 80, which may be used to selectively restrain thepiston 60 from moving axially relative to thewire member 50. As shown, the lockingdevice 80 may include anannular member 82 attached or otherwise fixed to theproximal end 52 of the wire member. 50. Theannular member 82 may include a ramped distal surface 84 leading to a recessed abutment 86. The lockingdevice 80 may also alocking ring 88 disposed distal to theannular member 82 and slidable along an exterior surface of thewire member 14. For example, the lockingring 88 may be directed axially, e.g., proximally, until it slidably engages the ramped distal surface 84 and enters the recessed abutment 86. - The locking
ring 88 may compress theannular member 82 inwardly as it slides along the ramped distal surface 84, thereby compressing theproximal end 52 of thewire member 50 inwardly against thepiston 55, e.g., to crimp thewire member 50 against thepiston 60 or otherwise frictionally engage thewire member 50 andpiston 60 together. Thus, substantial axial movement of thepiston 60, distally or proximally, relative to thewire member 50 may be prevented using thelocking device 80. - To allow movement of the
piston 60, the lockingring 88 may be disengaged from the recessed abutment 86 by pushing the lockingring 88 distally out of the recessed abutment 84 and down the ramped distal surface 86. Once the lockingring 88 is disengaged, thepiston 60 may be free to move axially within thewire member 50. - Alternatively, the locking device may include other locking mechanisms, such as one or more clips, retainers, and the like that may be activated to prevent substantial axial movement of the
piston 60 relative to thewire member 50 while the locking device is engaged. - Returning to
FIG. 1 , the system 10 may also include a source of sealingcompound 14, such as adual syringe assembly 40 or other delivery device (not shown), e.g., that includes two components of a sealing compound. As shown, thesyringe assembly 40 includes a pair of syringe barrels 42, includingoutlets 43 and aplunger assembly 44 slidable into thebarrels 42 to cause the components therein to be delivered through theoutlets 43. In the embodiment shown, theplunger assembly 44 includes a pair ofplungers 45 coupled to one another that are received inrespective barrels 42. In this manner, bothplungers 45 may be manually depressed substantially simultaneously to deliver the components together from the syringe barrels 42. Alternatively, a system for automatically advancing theplungers 45 and/or otherwise delivering the components in thebarrels 42 may be used, such as those disclosed in co-pending application Ser. No. 10/806,934, filed Mar. 22, 2004, the entire disclosure of which is expressly incorporated herein by reference. - Optionally, the
delivery device 14 may include a “Y” fitting 46, astatic mixer 48, and/ortubing 49, e.g., for connecting the “Y” fitting 48 tooutlets 43 of thebarrels 42, themixer 48 to the “Y” fitting 46 and/or to theside port 32 of thedelivery sheath 12, such that the sealing components ejected out of thebarrels 42 may mix before being directed into theside port 32 of thedelivery sheath 12. Theoutlets 43, “Y” fitting 46,mixer 48, and/ortubing 49 may include cooperating connectors, e.g., luer lock connectors and the like (not shown), for connecting them together. - Respective sealing components may be provided in each
syringe barrel 42 of thesyringe assembly 40 that, when mixed together, are activated to form a hydrogel or other sealing compound. Additional information on such hydrogels and systems for delivering them are disclosed in U.S. Pat. Nos. 6,152,943, 6,165,201, 6,179,862, 6,514,534, and 6,379,373, and in co-pending applications publication Nos. 2002-0106409 published on Aug. 8, 2002, 2003-0012734 published on Jan. 16, 2003, 2002-0114775 published on Aug. 22, 2002, and 2004-0249342 published on Dec. 9, 2004. The disclosures of these references and any others cited therein are expressly incorporated by reference herein. - With continued reference to
FIG. 1 , the system 10 may also include anintroducer sheath 18. As shown, theintroducer sheath 18 is an elongate tubular member including aproximal end 102, adistal end 104, and alumen 106 extending between the proximal anddistal ends introducer sheath 18 may terminate in a tapereddistal tip 105 for facilitating advancing theintroducer sheath 18 substantially atraumatically through tissue into a puncture. Exemplary materials for theintroducer sheath 18 may include one or more plastics, such as FEP, polyvinyl chloride (PVC), polyamide, PEEK, nylon, PET, PEBAX, and polyethylene, metals, such as stainless steel, and nickel titanium, and/or composite materials. Theintroducer sheath 18 may be substantially rigid, semi-rigid, or substantially flexible, e.g., to facilitate insertion through a puncture into a blood vessel or other body lumen. Theintroducer sheath 18 may have an outer diameter between about 0.080 to 0.140 inch and/or a wall thickness between about 0.002 to 0.10 inch. - A
housing 108 may be attached to or otherwise provided on the proximal end of theintroducer sheath 18. The housing may include aside port 109 that communicates with an interior of thehousing 108 and thelumen 106 of theintroducer sheath 18. A section of flexible tubing may be connected to or otherwise extend from theside port 109, terminating in a manual shut-off valve and/or a luer lock or other connector (not shown), e.g., to facilitate connecting tubing and the like (not shown) to theside port 109. Thehousing 108 may also include one or more seals (not shown), e.g., a hemostatic seal, for substantially sealing the lumen of thedelivery sheath 18, yet accommodating inserting one or more instruments (not shown) into the lumen. - Optionally, a
dilator 19 may also be provided, e.g., within the lumen 86 of theintroducer sheath 18. Thedilator 19 may also include aproximal end 112, adistal end 114 sized for insertion through the lumen of theintroducer sheath 18, alumen 118 extending between the proximal end distal ends, and a hub orother handle 120 on theproximal end 112. Thedistal end 114 may include a tapered or multiple ramped shape, similar to known dilators. Thedilator 19 may be formed from substantially rigid, semi-rigid, or substantially flexible materials, similar to theintroducer sheath 18. - The
dilator 19 may be loaded into theintroducer sheath 18 during manufacturing or immediately before a procedure. In addition, thedilator 19 may be loaded into theintroducer sheath 18 by inserting thedistal end 114 of thedilator 19 into thehub 108 andlumen 106 of theintroducer sheath 18 until thehubs introducer sheath 18, thedistal end 114 of thedilator 19 may extend beyond thedistal end 104 of theintroducer sheath 18, e.g., to provide a gradually tapering transition for the assembly. Thus, before a procedure, thedilator 19 andintroducer sheath 18 may be disposed concentrically around one another in an assembly, as shown inFIG. 1 . Optionally, thedilator 19 may be eliminated, if desired. - In one embodiment, a flexible and/or thin-
walled sleeve 20, similar to those disclosed in U.S. application Ser. No. 11/112,970, entitled “Apparatus and Methods For Facilitating Access Through A Puncture Including Sealing compound Therein,” filed Apr. 22, 2005, may also be used in connection with theintroducer sheath 18. The entire disclosure of this application is expressly incorporated by reference herein. - Turning to
FIGS. 3A-3C and 4A-4C, a method is shown for delivering an introducer sheath (and/or sleeve), such as theintroducer sheath 18 described above, into apassage 90 extending throughtissue 96. In the illustrated embodiment, thepassage 90 is a percutaneous puncture extending from a patient'sskin 92 to a blood vessel orother body lumen 94. For example, thevessel 94 may be a peripheral artery, e.g., a femoral artery, a carotid artery, and the like. It will be appreciated that systems and methods constructed and undertaken as described herein may be used to seal other passages through tissue within a patient's body. - Initially, as shown in
FIGS. 3A-3C , thepuncture 90 may be created and sealingcompound 99 may be delivered into thepuncture 90. Turning toFIG. 2A , to create thepuncture 90, ahollow needle 15 may be inserted through the patient'sskin 92 and interveningtissue 96 into thevessel 94. Theocclusion member 16, e.g., with thewire member 50 loaded with thepiston 60 sealing fluid therein, may be inserted into thepuncture 90, e.g., through theneedle 15 until thedistal tip 66 is disposed within thevessel 94. Optionally, as shown, the retainingsheath 17 may cover theballoon 58 on thewire member 50 as theocclusion member 16 is advanced through theneedle 15, thereby maintaining theballoon 58 in the contracted or collapsed condition. - Turning to
FIG. 2B , once theballoon 58 is located within thevessel 94, the needle may be removed, and theballoon 58 may be expanded within thevessel 94. For example, the retainingsheath 17 may be retracted completely (or only partially) out of thepuncture 90 to expose theballoon 58 within the vessel 84. - The
balloon 58 may then be expanded within thevessel 94. For example, as shown inFIG. 2B , thepiston 60 may be advanced distally relative to thewire member 50. As thepiston 60 is advanced within thewire member 50, fluid within thelumen 56 may enter the interior 59 of theballoon 58, causing theballoon 58 to expand. As described above, thewire member 50 and/orpiston 60 may include one or more elements that tactile and/or audio feedback to provide an indication that thepiston 60 has been advanced to a position where theballoon 58 is fully expanded. - Turning to
FIG. 3C , with theballoon 58 fully expanded, a delivery sheath, such as thedelivery sheath 12 described above, may be advanced over theocclusion member 16 into thepuncture 90, e.g., before or after theballoon 58 is expanded. For example, theproximal end 62 of thepiston 60 may be backloaded into thedistal end 24 of thedelivery sheath 12, and then thedelivery sheath 12 may be advanced over thepiston 60 andwire member 50 until thedistal end 24 enters thevessel 94. Because of the substantial uniformity in cross-section and size of thepiston 60 andwire member 50, thedelivery sheath 12 may pass easily over theocclusion member 16. Alternatively, theproximal end 52 of thewire member 50 may include a transition, e.g., a ramped proximal edge (not shown) to facilitate advancing thedelivery sheath 12 over thewire member 50. - In one embodiment, the
delivery sheath 12 may be advanced until thedistal end 24 is disposed within thevessel 94. Theballoon 58 may then be expanded (if not expanded before introducing the delivery sheath 12), and theocclusion member 16 may be partially retracted until theballoon 58 contacts thedistal end 24 of the delivery sheath 12 (providing a first tactile feedback). Theocclusion member 16 may be retracted by pulling on theproximal end 52 of thewire member 50 unless thepiston 60 is locked relative to thewire member 50, whereupon thepiston 60 may be pulled. Otherwise, thepiston 60 may be refracted relative to thewire member 50, which may prematurely deflate theballoon 58 or even release the fluid within thelumen 56 of thewire member 50. - The
occlusion member 16 may then be pulled further until theballoon 58 contacts the wall of the vessel 94 (providing a second tactile feedback), thereby partially in retracting thedelivery sheath 12 back into thepuncture 90, e.g., until thedistal end 24 is disposed adjacent thevessel 94. - Alternatively, the
occlusion member 16 may be retracted until the occlusion element 51 contacts the wall of thevessel 94 before thedelivery sheath 12 is introduced. Thedelivery sheath 12 may then be advanced into thepuncture 90 until thedistal end 24 contacts the expandedballoon 58, thereby providing tactile feedback that theoutlets 25 of thedelivery sheath 12 are disposed within thepuncture 90 proximal to thevessel 94. - With continued reference to
FIG. 3C , a source of sealingcompound 14, e.g., thedual syringe assembly 40 described above, may be prepared and connected to theside port 32 of thedelivery sheath 12, e.g., viatubing 49, either before or after thedelivery sheath 12 is advanced into thepuncture 90. The sealingcompound 99 may then be delivered through thesecondary lumen 30 and theoutlets 25 and into thepuncture 90. The sealingcompound 99 may flow radially outwardly to permeate at least partially into the tissue surrounding thepuncture 90. - Optionally, the
delivery sheath 12 may be retracted as the sealingcompound 99 is delivered, e.g., to fill thepuncture 90 along its length. Additional apparatus and methods for delivering the sealingcompound 99 into thepuncture 90 around theocclusion member 16 are disclosed in co-pending application Ser. Nos. 10/454,362 and 10/745,946, incorporated above, or in co-pending application Ser. No. 10/975,205, filed Oct. 27, 2004, the entire disclosure of which is expressly incorporated by reference herein. - Once a desired amount of the sealing
compound 99 is delivered into thepuncture 90, theocclusion member 16 may be maintained such that theballoon 58 continues to seal thepuncture 90 from thevessel 94, e.g., for sufficient time for the sealingcompound 99 to at least partially or completely cure. Thereafter (or immediately after filling the puncture 90), thedelivery sheath 12 may be removed entirely from thepuncture 90. - The
balloon 58 may then be deflated and theocclusion member 16 may be removed from thevessel 94 andpuncture 90. In one embodiment, theballoon 58 may be deflated by moving thepiston 60 proximally relative to thewire member 50. This action may withdraw the fluid within theinterior 59 of theballoon 58 back into thelumen 56 of thewire member 50, thereby substantially collapsing theballoon 58. With theballoon 58 collapsed, theocclusion member 16 may simply be pulled proximally out through thepuncture 90. - If the
piston 60 is locked relative to thewire member 50, the lock (not shown) may need to be disengaged. Alternatively, if the lock is not releasable, thepiston 60 may be pulled with sufficient force to break the lock. Optionally, thepiston 60 may be removed entirely from thewire member 50, thereby releasing the fluid within thelumen 56 of thewire member 50 and exposing thelumen 56 andinterior 59 of theballoon 58 to the ambient pressure of the surroundings. - The
wire member 50 may be withdrawn before or after removing thedelivery sheath 12. If thedelivery sheath 12 remains within thepuncture 90 while thewire member 50 is removed, theballoon 58 may be forced to collapse as it enters thedelivery sheath 12. If the piston has been removed or withdrawn proximally beyond the side port(s) 53 in thewire member 50, this action may force any residual fluid within theballoon 58 out of theballoon 58 and out the side port(s) 53 and/orproximal end 52 of thewire member 50. - Optionally, turning now to
FIGS. 4A-4C , anintroducer sheath 18 and/orflexible sleeve 20, such as those described above and disclosed in the above-incorporated ACI-010 application, may be delivered into thepuncture 90 and/or through the sealingcompound 99. Thesleeve 20 may prevent sealingcompound 99 from separating and/or otherwise being released during introduction of theintroducer sheath 18, as explained further below. Alternatively, thesleeve 20 may be omitted entirely. - As shown in
FIG. 4A , the wire member 50 (or the entire occlusion member 16) may remain within thepuncture 90 andvessel 94 after delivering the sealingcompound 99. Optionally, the balloon 58 (not shown) may remain exposed and/or expanded, or the optional retaining sheath 17 (also not shown) may be advanced over thewire member 50 to cover and/or collapse theballoon 58. Alternatively, thewire member 50 may be removed from thepuncture 90 and a separate guidewire (not shown), e.g., withoutballoon 58, may be advanced through thepuncture 90 into thevessel 94 in place of thewire member 50. - Turning to
FIG. 4B , theintroducer sheath 18,dilator 19, andsleeve 20 may then be introduced into thepuncture 90, e.g., over the wire member 50 (or the entire occlusion member 16). For example, theproximal end 52 of thewire member 50 and/or theproximal end 62 of thepiston 60 may be backloaded into theintroducer sheath 18 before theintroducer sheath 18 is advanced into thepuncture 90. Optionally,hub 122 of thesleeve 20 may be placed against or immediately above the patient'sskin 92 overlying thepuncture 90. - Turning to
FIG. 4C , the introducer sheath 18 (and any of thedilator 19 and/orsleeve 20 carried therein) may then be advanced into thepuncture 90, e.g., until thedistal end 104 of theintroducer sheath 18 is disposed within thevessel 94. As theintroducer sheath 18 is advanced, thesleeve 20 may unfurl from theintroducer sheath 18 and become exposed within thepuncture 90, e.g., everting and surrounding the exterior of theintroducer sheath 18. In the embodiment shown, the length of thesleeve 20 is shorter than theintroducer sheath 18 such that the free end of thesleeve 20 is disposed proximal to the distal end of theintroducer sheath 18 and may not extend into thevessel 94. - The
dilator 19 and/or tubular member (not shown) may be withdrawn through theintroducer sheath 18 from thepuncture 90, e.g., together or successively, leaving theintroducer sheath 18 andsleeve 20 within thepuncture 90. The wire member 50 (or entire occlusion member 16) may also be removed along with, before, or after thedilator 19 and/or tubular member, e.g., after collapsing the balloon 58 (not shown). Alternatively, if theballoon 58 is still expanded, thewire member 50 may be removed, causing theintroducer sheath 18 ordilator 19 to collapse theballoon 58 towards the collapsed state as it enters the lumen of theintroducer sheath 18. - Once the distal end of the
introducer sheath 18 is disposed within thevessel 94, one or more instruments (not shown) may be advanced through theintroducer sheath 18 into thevessel 94, e.g., to perform one or more diagnostic and/or interventional procedures within the patient's body, as is known to those skilled in the art. Thesleeve 20 generally does not interfere with the introduction of such instruments, since it is located only around theintroducer sheath 18. - Optionally, if the
sleeve 20 includes any weakened seams, thesleeve 20 may be removed from around theintroducer sheath 18 to provide a conventional introducer sheath arrangement for the subsequent procedure. For example, thesleeve 20 may separate into two or more pieces, e.g., along one or more predetermined seams (not shown). Thus, conventional procedures may be used without need for extra attention to thesleeve 20. - Upon completing any such procedures, the instrument(s) may be removed from the
vessel 94 through theintroducer sheath 18. Theintroducer sheath 18 and sleeve 20 (if remaining around the introducer sheath 18) may then be removed from thevessel 94 andpuncture 90, e.g., simultaneously or successively. The sealingcompound 99 and/or tissue may recoil sufficiently to substantially fill thepuncture 90, thereby allowing and/or encouraging hemostasis to occur between thevessel 94 andpuncture 90. Optionally, external pressure may be applied to the patient'sskin 92 during removal of theintroducer sheath 18, e.g., to further enhance sealing of thepuncture 90 until hemostasis occurs. - Turning to
FIGS. 5A and 5B , another embodiment of anocclusion member 116 is shown that may be included in a system, e.g., instead of theocclusion member 16 described above. Theocclusion member 16 generally includes an elongate wire member or othertubular body 150 carrying a balloon or otherexpandable member 158. Similar to the previous embodiment, thewire member 150 includes aproximal end 152, adistal end 154, and alumen 156 extending at least partially between the proximal anddistal ends wire member 150 may have an outer diameter or other cross-section between about 0.008-0.038 inch, e.g., not more than about 0.040 inch. - The
wire member 150 may be substantially flexible or semi-rigid, e.g., to allow thewire member 150 to curve, bend, or otherwise adapt to anatomy through which it is advanced, yet have sufficient column strength to accommodate advancing thedistal end 154 by pushing on theproximal end 152. Thewire member 150 may be formed from one or more wire coil(s) (not shown) wound into an elongate tubular shape, optionally, including applied to the wire coil(s) to create a substantially nonporous wall or may be formed from a solid-walled tube, similar to the previous embodiment. - The
balloon 158 may be expandable from a collapsed state (such as that shown inFIG. 5B ) to an enlarged state (such as that shown inFIG. 5A ), e.g., by introducing fluid into an interior 159 of theballoon 158. Theballoon 158 may be formed from a flexible, substantially inelastic material, e.g., to provide a substantially noncompliant orsemi-compliant balloon 159 that expands to a predetermined size, or theballoon 158 may be formed from an elastic material, such that the size of theballoon 158 depends upon the pressure or volume of fluid delivered into theballoon 158. - As shown, the
balloon 158 is disposed proximal to adistal tip 155 of theocclusion member 116, as described further below. For example, theballoon 158 may include afirst end 158 a attached to adistal end 154 of awire member 150 and asecond end 158 b attached to thedistal tip 155. Thedistal tip 155 may be a rounded, tapered, and/or substantially blunt member providing a substantially atraumatic tip, e.g., including a “J” tip (not shown), if desired to facilitate advancement. - As shown, the
proximal end 152 of thewire member 150 is substantially closed, e.g., by providing a plug, sealant, glue, or other seal material in theproximal end 152. Alternatively, theproximal end 152 may be capped using a cap or other element (not shown). Thus, thelumen 156 may be substantially isolated from the region surrounding thewire member 150. - To communicate with the
lumen 156, thewire member 150 may include one or more ports orother openings 153 located in an intermediate region of thewire member 150, e.g., adjacent theproximal end 152. The port(s) 153 may communicate directly with thelumen 156, e.g., allowing a fluid source (not shown) to communicate with thelumen 156 from the outside environment surrounding thewire member 150, as described further below. - The
occlusion member 116 may also include a spring or biasing mechanism, such asspring wire 160 within thelumen 156 or otherwise coupled to thewire member 150. Thespring wire 160 may be formed from an elastic or superelastic material, e.g., stainless steel or Nitinol, that may be sufficiently flexible to bend within thewire member 150, yet have sufficient column strength to bias thespring wire 160 to extend axially. Thespring wire 160 may be a solid wire, e.g., having a round or flat cross-section. Optionally, one or more other biasing mechanisms (not shown) may be provided or the biasing mechanism may be omitted. - The
spring wire 160 may be an elongate member including aproximal end 162 that is fixed relative to thewire member 150, and adistal end 164 that is fixed relative to thedistal tip 155. For example, theproximal end 162 of thespring wire 160 may be attached to theproximal end 162 of thewire member 150, e.g., using an adhesive, sonic or other welding, embedding theproximal end 162 in the seal material, and the like. Thedistal end 164 of thespring wire 160 may be similarly attached to thedistal tip 155 or alternatively to thedistal end 158 b of theballoon 158. - The relative lengths and fixation points of the
wire member 150 and thespring wire 160 may place thespring wire 160 under slight tension inside thewire member 50, thereby biasing thedistal tip 155 away from thedistal end 154 of thewire member 150. This may place theballoon 158 under tension, thereby minimizing the cross-section of theballoon 158 in the collapsed state. This bias provided by thespring wire 160 may facilitate collapsing theballoon 158 after a procedure, e.g., to facilitate withdrawing theballoon 158 from a puncture 90 (not shown), as described further below. - Turning to
FIG. 3A , when fluid is delivered into theinterior 159 of theballoon 158, e.g., using the devices and/or methods described further below, theballoon 158 may shorten as it expands. Consequently, this may place thespring wire 160 under a compressive stress, foreshortening the distance between the proximal anddistal ends spring wire 160. To reduce the resulting stress, thespring wire 160 may partially coil or otherwise contort inside thelumen 156 of thewire member 150. This may cause thewire member 150 to curve or otherwise twist to reduce the stress imposed by thespring wire 160 when thewire member 150 is free from outside forces or constraints (such as tissue surrounding a puncture). - When fluid 54 is evacuated from the interior of the
balloon 158, the balloon returns towards the collapsed state ofFIG. 5B . This may release the compressive force on thespring wire 160, whereupon thespring wire 160 may resiliently extend, i.e., move thedistal end 164 distally away from theproximal end 162. This may bias theballoon 158 to extend distally, i.e., elongate, as it returns towards the collapsed state, thereby minimizing the profile of theballoon 158. - Turning to
FIG. 6 , an exemplary embodiment of afluid loading device 170 is shown for delivering fluid into and out of thelumen 156 of thewire member 150, e.g., via the one or more side port(s) 153. The fluid may be used to selectively expand and/or collapse theballoon 58, similar to the embodiments described above. Generally, thefluid loading device 170 includes ahousing 171 receivable on theproximal end 152 of thewire member 150, and aconnector 179 for connecting to a source of vacuum or fluid, such assyringe 178, to thehousing 171. - As shown, the
housing 171 includes aproximal end 172 including theconnector 179 thereon, adistal end 174, and a lumen orchamber 176 extending at least partially between the proximal anddistal ends distal end 174 is substantially open, having a size for receiving theproximal end 152 of thewire member 150 therein through thedistal end 174 of thehousing 171. Thehousing 171 may also include a shut-offmechanism 173 for selectively isolating or accessing thechamber 176 from theproximal end 172 of thehousing 171. - The
housing 171 has a sufficient length such that, when thehousing 171 is advanced onto theproximal end 152 of thewire member 150, thedistal end 174 of thehousing 171 extends distally beyond the side port(s) 153 in thewire member 150. Thus, the side port(s) 153 in thewire member 150 may communicate with thechamber 176 around theproximal end 152 of thewire member 150. Optionally, thehousing 171 may include aseal 175, such as a septum, o-ring, and the like, disposed within thedistal end 174 of the housing. Theseal 175 may be able to slide along the exterior of thewire member 150, yet create a substantially fluid-tight seal between the exterior of thewire member 150 and thedistal end 174 of thehousing 171. - The shut-off
mechanism 173 may include a manual stopcock that may be rotated to allow a passageway therein to communicate between theproximal end 172 and thechamber 176 or isolate thechamber 176 from theproximal end 172 depending on its orientation (shown as open inFIG. 6 ). Alternatively, a valve or other manual or actuated shut-off mechanism (not shown) may be provided instead of the stopcock. Theconnector 179 may be a male or female Luer lock connector, or other connector for removably engaging with thesyringe 178. Alternatively, theconnector 179 and shut-offmechanism 173 may be replaced by a penetrable seal (not shown), e.g., which may be penetrated by a needle (also not shown) on thesyringe 178. - Optionally, a locking mechanism (not shown) may be provided for securing the
housing 171 to theproximal end 152 of thewire member 150. For example, a clamp or other device may be provided that may be tightened around thedistal end 174 of thehousing 171. Alternatively, thehousing 171 may be sufficiently secured over thewire member 150 by friction or an interference fit. - Still referring to
FIG. 6 , during use, thehousing 171 may be advanced onto thewire member 150, and asyringe 178 may be connected to theconnector 179. With the shut-offmechanism 173 open, thesyringe 178 may be drawn to evacuate substantially the air out of thelumen 156 of thewire member 150 and/or out of theinterior 159 of theballoon 158. Fluid, e.g., saline or water, may then be delivered intochamber 176, and consequently into thelumen 156 and theinterior 159 of theballoon 158 to expand theballoon 158. The shut-offmechanism 173 may be closed, and thesyringe 178 may be disconnected, leaving thehousing 171 on theproximal end 152 of thewire member 150. - When it is desired to collapse the
balloon 158, the shut-offmechanism 173 may be opened, thereby allowing the fluid within thelumen 156 and theinterior 159 of theballoon 158 to escape, e.g., to equalize the pressure within theballoon 158 to the surrounding ambient pressure. Alternatively, asyringe 178 or other source of vacuum may be connected to theconnector 179, and the fluid may be evacuated actively from within theballoon 178 to collapse theballoon 178. - During a procedure, such as the sealing procedure described above, the
occlusion member 116 may be advanced into a puncture (not shown), e.g., by introducing thedistal end 154 of thewire member 150 into the puncture with theballoon 158 collapsed until theballoon 158 is disposed within a blood vessel (also not shown) accessed via the puncture. Theocclusion member 116 may be advanced through a needle (not shown) used to create the puncture or through a delivery sheath (also not shown) already placed in the puncture. If a delivery sheath is not already in place, the delivery sheath may be advanced over theocclusion member 116, e.g., by backloading theproximal end 152 of thewire member 150 into the delivery sheath lumen. - The
housing 171 may then be attached to theproximal end 152 of thewire member 150, which should be extending from the proximal end of the delivery sheath. Alternatively, thehousing 171 may be attached to theproximal end 152 of thewire member 150 before the delivery sheath is introduced if the cross-section of thehousing 171 is small enough to pass through the delivery sheath lumen. - The
syringe 178 or other source of fluid may then be connected to thehousing 171, e.g., after opening the shut-offmechanism 173, and fluid may be directed into thelumen 156 of thewire member 150 via thechamber 176 of thehousing 171. Sufficient fluid may be introduced into thelumen 156 of thewire member 150 to substantially expand theballoon 158 to the enlarged state. - The expanded
balloon 158 may then be used to seal the vessel from the puncture, e.g., by at least partially retracting theocclusion member 116 until theballoon 158 substantially engages the wall of the vessel. Sealing compound may then be delivered into the puncture via the delivery sheath, similar to the embodiments described above. Optionally, once sufficient sealing compound has been delivered into the puncture, the delivery sheath may be withdrawn from the puncture, and an introducer sheath (not shown) may be advanced over theocclusion member 116 into the puncture. - The
balloon 158 may be collapsed and/or removed from the puncture, e.g., before or after placing the introducer sheath in the puncture. To collapse theballoon 158, the shut-offmechanism 173 may simply be opened, thereby allowing fluid to pass out of theinterior 159 of theballoon 158, through thelumen 156, and possibly out of theproximal end 172 of thehousing 171. Fluid may be affirmatively evacuated from within theballoon 158, or, with the shut-offmechanism 173 open, theocclusion member 116 may be withdraw, causing theballoon 158 to collapse as it pulled into the lumen of the introducer or delivery sheath. - While the above-described occlusion members have been described in connection with pre-sealing applications, it should be understood that the occlusion members described herein may be used during other procedures. For example, in one embodiment, an occlusion member, such as those described above, may be inserted into a puncture through tissue after completing a procedure that involves accessing a blood vessel or other body lumen via the puncture. Exemplary apparatus and methods for accessing a blood vessel or other body lumen, and/or for sealing the puncture after completing such a procedure are described in co-pending application Ser. No. 10/454,362, filed Jun. 4, 2003, incorporated by reference above, and Ser. No. 10/806,952, filed Mar. 22, 2004, the entire disclosure of which is expressly incorporated by reference herein.
- While the invention is susceptible to various modifications, and alternative forms, specific examples thereof have been shown in the drawings and are herein described in detail. It should be understood, however, that the invention is not to be limited to the particular embodiments or methods disclosed, but to the contrary, the invention is to cover all modifications, equivalents and alternatives falling within the scope of the appended claims.
Claims (20)
1. An occlusion device for sealing a puncture through tissue, comprising:
an elongate tubular member comprising a proximal end, a distal end sized for insertion into a puncture, a lumen extending at least partially between the proximal and distal ends, and an expandable occlusion element carried on a distal region of the tubular member, the occlusion element having an interior communicating with a distal opening in the lumen, the tubular member having a substantially uniform diameter extending between the proximal end and the distal region; and
a fluid loading device receivable on the proximal end of the elongate tubular member for delivering fluid into, and drawing fluid out of, the interior of the occlusion element to thereby expand and collapse the occlusion element.
2. The device of claim 1 , wherein the fluid loading device further comprises a connector to connect a source of fluid to a housing of the fluid loading device.
3. The device of claim 2 , wherein the source of fluid is a syringe.
4. The device of claim 2 , wherein the housing further comprises a shut-off mechanism having an open and a closed position.
5. The device of claim 4 , wherein the open position of the shut-off mechanism allows for the source of fluid to evacuate substantially all the air out of the lumen of the elongate tubular member and/or out of the interior of the occlusion element.
6. The device of claim 4 , wherein the closed position of the shut-off mechanism allows for isolating fluid delivered from the source of fluid into the lumen of the elongate tubular member and into the interior of the occlusion element.
7. The device of claim 1 , wherein the tubular member further comprises a port in a proximal region of the tubular member communicating with the lumen and communicating with the fluid loading device.
8. The device of claim 1 , wherein the tubular member has an outer diameter of not more than about 0.040 inch.
9. The device of claim 1 , wherein the tubular member comprises one or more wire coils defining a substantially nonporous wall of the tubular member.
10. The device of claim 1 , wherein the tubular member comprises a solid-walled tubular body defining the lumen.
11. An occlusion device for sealing a puncture through tissue, comprising:
an elongate tubular member comprising a proximal end, a distal end sized for insertion into a puncture, a lumen extending at least partially between the proximal and distal ends, a port in a proximal region of the tubular member communicating with the lumen, and an expandable occlusion element carried on a distal region of the tubular member, the occlusion element having an interior communicating with a distal opening in the lumen; and
a fluid loading device connectable to the proximal region of the tubular member, such that the fluid loading device seals all sides of the tubular member and the fluid loading device communicates with the port for delivering fluid from the fluid loading device into the lumen of the tubular member; and
a syringe coupled to the fluid loading device to deliver fluid into the lumen to allow expansion and collapse of the occlusion element.
12. The device of claim 11 , wherein the fluid loading device further comprises a shut-off mechanism that isolates fluid loaded into the lumen from the fluid loading device when the shut-off mechanism is placed in the closed position.
13. The device of claim 12 , wherein fluid is released from the lumen when the shut-off mechanism is placed in the open position.
14. The device of claim 11 , wherein the tubular member has an outer diameter of not more than about 0.040 inch between the proximal end and the distal region.
15. The device of claim 11 , wherein the tubular member has a substantially uniform outer cross-section such that a delivery sheath may pass easily over the occlusion device when the occlusion device is backloaded into the delivery sheath.
16. A method for sealing a puncture extending through tissue from a patient's skin to a body lumen, comprising:
introducing a distal end of an elongate occlusion member into the puncture until an expandable member carried on the distal end is disposed within the body lumen, the occlusion member comprising a substantially uniform diameter lumen extending proximally from the distal end and communicating with an interior of the expandable member;
delivering fluid into the lumen of the elongate occlusion member to the interior of the expandable member to thereby expand the expandable member;
retracting the occlusion member at least partially against a wall of the body lumen to cause the expandable member to substantially seal the body lumen from the puncture;
advancing a sheath over the proximal end of the elongate occlusion member into the puncture; and
delivering sealing compound into the puncture through the sheath.
17. The method of claim 16 , further comprising closing a shut-off mechanism to isolate fluid within the lumen and interior of the expandable member.
18. The method of claim 17 , further comprising collapsing the expandable member and withdrawing fluid from the interior of the expandable member and body lumen by opening the shut-off mechanism.
19. The method of claim 16 , wherein the step of delivering fluid into the lumen further comprises providing a syringe connected to a fluid loading device attached to a proximal end of the elongate occlusion member.
20. The method of claim 16 , wherein the elongate occlusion member has substantial uniformity in cross-section such that the sheath passes easily over the elongate occlusion member when the sheath is advanced over the elongate occlusion member.
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US11/112,877 US8002742B2 (en) | 2005-04-22 | 2005-04-22 | Apparatus and methods for sealing a puncture in tissue |
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US14/801,081 US20150351732A1 (en) | 2005-04-22 | 2015-07-16 | Apparatus and methods for sealing a puncture in tissue |
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US14/801,081 Abandoned US20150351732A1 (en) | 2005-04-22 | 2015-07-16 | Apparatus and methods for sealing a puncture in tissue |
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Also Published As
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US8002742B2 (en) | 2011-08-23 |
US20060253072A1 (en) | 2006-11-09 |
US9107645B2 (en) | 2015-08-18 |
US20110301640A1 (en) | 2011-12-08 |
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