CA2345738A1 - Apparatus for loading a bag enclosed stent on a catheter - Google Patents
Apparatus for loading a bag enclosed stent on a catheter Download PDFInfo
- Publication number
- CA2345738A1 CA2345738A1 CA002345738A CA2345738A CA2345738A1 CA 2345738 A1 CA2345738 A1 CA 2345738A1 CA 002345738 A CA002345738 A CA 002345738A CA 2345738 A CA2345738 A CA 2345738A CA 2345738 A1 CA2345738 A1 CA 2345738A1
- Authority
- CA
- Canada
- Prior art keywords
- stent
- sleeve
- catheter
- diameter
- passageway
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/958—Inflatable balloons for placing stents or stent-grafts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/9522—Means for mounting a stent or stent-graft onto or into a placement instrument
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/9522—Means for mounting a stent or stent-graft onto or into a placement instrument
- A61F2/9525—Means for mounting a stent or stent-graft onto or into a placement instrument using a funnel
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
Abstract
An apparatus for loading a stem onto or into a catheter. A flexible sterile sleeve is provided to encase the stent as it is pulled through a loading device. The loading device is a simple design utilizing a tapered passageway. The passageway has first diameter at a proximal end which tapers to a second diameter, forming a funnel. The passageway continues at the second diameter forming a tube. The sleeved stent is pulled through the loading device from the proximal end to the distal end, smoothly compressing the stent. Depending on the type of stent and catheter being used, the stent is either crimped onto the catheter as it is pulled through the funnel, or is loaded into a catheter positioned at the distal end of the loading device. The sleeve acts to minimize the frictional forces to which the stent is subjected and to eliminate the longitudinal force that the stent would be subjected to if pushed or pulled directly. The sleeve may be close-ended to provide an additional sterility barrier about the stent.
Description
APPARATUS FOR LOADING A BAG ENCLOSED STENT ON A CATHETER
1. Field of the invenjrion The present invention relates generally to the field of medical devices, and more particularly, to devices for loading stents onto or into a catheter for use in a medical procedure.
1. Field of the invenjrion The present invention relates generally to the field of medical devices, and more particularly, to devices for loading stents onto or into a catheter for use in a medical procedure.
2. j~~scri t't~ ion c~f Related Art Stents and similar endoluminal devices are currently used by medical practitioners to treat vessels that become narcowed so that flow through the vessels is restricted. This problem arises, for example, as a result of the disease process known as arteriosclerosis or after an angioplasty of a coronary artery to correct arteriosclerosis when excess tissue proliferation blocks the newly opened vessel. Stents can also be used to reinforce collapsed or narrowed tubular structures in the respiratory system, the reproductive system, biliary ducts or any other tubular body lumen. A procedure for inserting stents often involves first passing a guide wire through the affected area of the lumen.
A catheter is then inserted over the guide wire and advanced to the site. The stent is inserted either simultaneously with the catheter (e.g., is present on the tip of the catheter) or immediately following insertion of the catheter (e.g., is passed through the catheter).
!n many cases, an angioplasty balloon catheter will be advanced to the affected site. The balloon is then inflated, compressing the growth or material causing the narrowing. A stent is then inserted into the compressed area to prevent restenosis of the vessel. in some cases a balloon catheter with a metal stent crimped over the balloon is used. This device is inserted into the affected h _2_ site and the balloon inflated, thereby enlarging the stent to its full size and compressing the growth. Still another variation is placing a compressed self expanding stent inside a catheter. After the catheter is advanced to the affected site, the stent is released from the catheter, whereupon it expands to its full size.
Whichever method is used, the stent must first be Nloaded" onto or into the delivery catheter. One common way of accomplishing this is for the physician to hand crimp the stent over the end of a balloon catheter. The physician selects the appropriate size and type of stent and manually deforms it with his or her fcngers to crimp it over the balloon prior to insertion of the balloon catheter into the patient. This procedure is not optimal because there is a lack of uniformity in the crimping process. The stent may either be inadequately compressed or be excessively compressed so that it is mechanically damaged.
In addition, traditional loading methods potentially subject the stent to contamination.
Many prior art solutions to the problems of stent compression have involved the use of tapering passageways or "funnels". The stent is inserted into the funnel in an enlarged state and is pulled or pushed through the funnel, compressing the stent onto a balloon catheter which has been inserted inside the small end of the funnel. U.S. Patent No. 5,fi93,089 to Inoue discloses one such device. In this reference, a stent is crimped onto a balloon catheter by pulling the stent through the funnel. The disadvantage to this approach is that pushing or pulling a sometimes .fragile stent onto a delivery device will distort andlor permanently damage the stent. Another example is shown in U.S.
Patent No. 5,725,519 to Penner et al. which discloses loading a stent onto a balloon catheter by means of a two piece device which employs a funnei-shaped bore to compress the stent. The Penner et al. device incorporates an open-ended flexible tube to surround the stent. White Penner addresses the need for uniformity in compressing stents, it is intended to crimp stents onto balloon catheters and cannot be used to load stents into catheters. Further, it
A catheter is then inserted over the guide wire and advanced to the site. The stent is inserted either simultaneously with the catheter (e.g., is present on the tip of the catheter) or immediately following insertion of the catheter (e.g., is passed through the catheter).
!n many cases, an angioplasty balloon catheter will be advanced to the affected site. The balloon is then inflated, compressing the growth or material causing the narrowing. A stent is then inserted into the compressed area to prevent restenosis of the vessel. in some cases a balloon catheter with a metal stent crimped over the balloon is used. This device is inserted into the affected h _2_ site and the balloon inflated, thereby enlarging the stent to its full size and compressing the growth. Still another variation is placing a compressed self expanding stent inside a catheter. After the catheter is advanced to the affected site, the stent is released from the catheter, whereupon it expands to its full size.
Whichever method is used, the stent must first be Nloaded" onto or into the delivery catheter. One common way of accomplishing this is for the physician to hand crimp the stent over the end of a balloon catheter. The physician selects the appropriate size and type of stent and manually deforms it with his or her fcngers to crimp it over the balloon prior to insertion of the balloon catheter into the patient. This procedure is not optimal because there is a lack of uniformity in the crimping process. The stent may either be inadequately compressed or be excessively compressed so that it is mechanically damaged.
In addition, traditional loading methods potentially subject the stent to contamination.
Many prior art solutions to the problems of stent compression have involved the use of tapering passageways or "funnels". The stent is inserted into the funnel in an enlarged state and is pulled or pushed through the funnel, compressing the stent onto a balloon catheter which has been inserted inside the small end of the funnel. U.S. Patent No. 5,fi93,089 to Inoue discloses one such device. In this reference, a stent is crimped onto a balloon catheter by pulling the stent through the funnel. The disadvantage to this approach is that pushing or pulling a sometimes .fragile stent onto a delivery device will distort andlor permanently damage the stent. Another example is shown in U.S.
Patent No. 5,725,519 to Penner et al. which discloses loading a stent onto a balloon catheter by means of a two piece device which employs a funnei-shaped bore to compress the stent. The Penner et al. device incorporates an open-ended flexible tube to surround the stent. White Penner addresses the need for uniformity in compressing stents, it is intended to crimp stents onto balloon catheters and cannot be used to load stents into catheters. Further, it
-3-does not contemplate an embodiment to completely enclose and protect the sterility of a stem. Therefore, it is desirable to provide a loading device for stents that would uniformly compress or crimp a stent onto or into a catheter while minimizing manipulation of the stem prior to the crimping process.
~,11M~~ARY OF THE INVENTION
The present invention compresses and loads stents onto or into a catheter by using either an open-ended sleeve to prevent stress to the stent or a closed-end bag prevent stress and preserve sterilely.
It is an object of this invention to minimize the frictional (shear) forces acting on the wall of a stent during the process of loading a stent onto or into a catheter.
It is a further object of the present invention to provide a procedure for crimping a stent onto or into a catheter while maintaining stent sterility.
These and additional objects are accomplished using either an open-ended sleeve or a close-ended sleeve ("bag") and a loading device. First, a full-sized stent is placed into a flexible sleeve (either open or close-ended).
This step is contemplated to be carried out by the manufacturer. The enclosed stent would be inserted into sterile packaging and subjected to routine sterilization procedures (e.g., radiation or chemical sterilization). Alternatively, sterile sleeves can be provided for "field loading" of the scent. The sleeve or bag can consist of many different materials, such as polyethylene, polytetrafluoroethylene ("PTFE") or especially expanded polytetrafluoroethylene ("ePTFE"). The bag may be advantageously treated with various coatings to lubricate passage of the scent through the funnel. In the case of an open-ended sleeve, the inner surface is advantageously coated with a biocompatible "tackyn coating to enhance friction between the sleeve and the stent. Typically, the sleeve or bag is longer than the stent so that the end of the bag or sleeve can be threaded through the small orifice of the loading device and grasped: The catheter to be loaded is then placed into the loading device so that the distal end of the catheter lies near the proximal {small) orifice of the funnel-shaped loading device. The sterile outer packaging material is opened, and the bag with the stent inside is then inserted over the catheter end and the bag and scent are simultaneously pulled through the loading device from large orifice to small orifice: This results in a catheter with a stent uniformly compressed onto its end and with the bag over the end to maintain sterile conditions. Although the loading procedure nom~ally takes place in a sterile operating environment, the sleeve provides an additional barrier to guarantee stent sterility. Even an open ended sleeve provided significant protection against contamination.
Because the scent is left in the patient indefinitely, even a single pathogenic organism might cause serious complications. Immediately before the stmt is inserted into the patient, the bag can be removed. Removal of the bag or sleeve can consist of sliding it back off of the device, or tearing it off using a tear strip (e.g., an embedded length of fiber that can be pulled to cut open the sheath). Also, tear away seams or perforations can be incorporated into the bag or sleeve for easy removal.
Providing a buffer layer of sleeve material over the scent is beneficial in at least two ways. First, the layer acts to minimize the frictional forces to which the stent is subjected in being reduced it from full diameter. Second, by pulling the bag or sleeve rather than directly pushing or pulling the stent, the longitudinally applied force is avoided, thereby reducing stresses to the stent.
As a result there is less chance of perforating any covering (e.g., an encapsulated stent) or of damaging the scent struts through bending or fracture.
The loading device consists of a block of material traversed by a passageway of varying diameter {e.g., funnel-shaped). At the proximal end of the block, the passageway has its widest first diameter. This wide first diameter tapers down to a second smaller diameter, thereby forming a funnel shape.
The second diameter runs throughout the remainder of the block forming a tubular shape. The cross-section of the second diameter can be circular or can t be other shapes such as a rounded star (e.g., a star shape wherein the arms have rounded tips) to aid in the compression and folding of the bag andlor enclosed stent. The funnel-shaped passageway can be produced by drilling or cutting a solid block of material (plastic such as an acrylic or metal such as aluminum). The passageway can also be produced by well-known methods of molding. Alternatively, the funnel-shape can be constructed from formed sheet metal, etc.
This device is useful not only for loading a stent g~ a catheter, as described above, but can also be used to load a stent i o a catheter. in this case, the catheter is placed into a port at the distal end of the loading device.
This port has a diameter larger than the second diameter and is large enough to accommodate a catheter designed for loading stents inside. The bagged stent is then pulled through the device and into the catheter. The bag or sleeve is pulled over the catheter at the same time and remains in place until the catheter is used on a patient. The bag or sleeve can be sealed (closed) at the distal end at least. (f the sleeve is to be pulled over the catheter (rather like putting on a sock) as described above, then the proximal end, at least, must be left open. Although the sleeve may be open at both ends, it is advantageous to enclose the stent by sealing both ends to allow for the stent to be sterilized.
Then one end can be sterilely opened just before compression of the stent.
Alternatively, the bag can be split to pass over and around the end of the catheter. If the sleeve is to be pulled through the catheter, it is not necessary to even have even a single open end, and the bag can remain completely closed to ensure sterility.
BRIEF DESCRIPTION OF TH DRAWINGS
FIG. 1 is a longitudinal-sectional view of a first embodiment of a stem loading apparatus.
FIG. 2 is a cross-sectional view of FIG. 1 taken at 2-2.
a WO flfl/18329 PCTIUS99/22812 FIG. 3 is a cross-sectional view of an alternative embodiment of the stent loading device (also taken at a point corresponding to 2-2).
FIG. 4 is a longitudinal-sectional view of an embodiment of the scent loading apparatus in the initial phases of compressing a stent onto an~
angioplasty balloon.
FiG. 5 shows the device of FIG. 4 after completion of the scent compression.
FIG. 6 is a longitudinal-sectional view of an additional embodiment of the stent loading apparatus wherein the bag is pulled through the catheter.
FIG. 7 is a longitudinal-sectional view of the embodiment of FIG. 1 used with an open-ended sleeve.
DETAILED DESrRIPTION OF THE PREFERRED EMBODIMENT
Referring now to the drawings, in which like reference numbers represent similar or identical structures throughout, FIG. 1 depicts a stent loading apparatus 10 consisting of a loading device 20 and a closed ended sleeve 30 (this and all other embodiments can be used with an open-ended sleeve as well). A stent 50 and a catheter 40 in which the stent 50 is loaded are also shown. The loading device 20 is a block 22 which has at its center a passageway of varying diameter. This passageway can be coated with PTFE
or other low friction material that facilitates the movement of the bag-enclosed scent 50. At the proximal end of the block 22, the passageway has its largest diameter 26. From there the passageway tapers to a second diameter 28 thus forming a funnel shape. The second diameter 28 is constant to the distaff end of the block, forming a tube.
FIG. 2 shows a cross-section of the loading device 20. At the distal end of the block 22, the tube-like section of the passageway widens to a third _7_ diameter 24 to permit the docking of a catheter 40. Pulling the stent 50 through the loading device 20 compresses it from its full diameter to the illustrated smaller diameter. To accomplish this the stent 50 is placed inside of the sleeve 30 prior to being pulled through the passageway. As mentioned above, there .
are advantages to using a sleeve 30 which is initially closed at both ends. In such a case one end is opened prior to the compression process leaving only a single closed end 34. The sleeve 30 is pulled through the loading device 20 by extensions 32 of sleeve material located near the open end. As the sleeve 30 is pulled through the loading device 20, compressing the stent, it is also pulled over the end of the catheter 40. The sleeve 30 is pulled until the stent 50 is entirely inside the catheter 40, where it comes in contact with a catheter unloading arm or plunger 44. Following loading the sleeve 30 can remain over the end of the catheter 40 with its closed end 34 sealing the stent 50 from the outside. Of course, the bag 30 must be torn off prior to insertion of the catheter into the patient.
The sleeve 30 can be made from any of a number of plastic films such as polyethylene, polyvinyl, polyurethane, cellulose, and PTFE. PTFE is especially preferred because it is "slippery". Alternately, other plastic films can be coated with antifriction materials. It may also be advantageous to coat the inside surface with a slightly plastic or tacky composition to "grip" the stent and control the movement of the film relative to the scent so that forces are uniformly applied to the length of the stent 30 as opposed to being applied just by the end 34 of the bag. With an open-ended sleeve as shown in FIG. 7 such a "gripping" coating is especially important. Expanded PTFE is especially preferred because this material is readily permeable to air. Thus, a sleeve that is closed at both ends can be readily compressed since the air easily escapes through the ePTFE. If a closed sleeve of other plastic films is used, special provision must be made for escape of trapped air during the compression process.
_$-In the case of stents fabricated from shape memory alloy the passageway can advantageously be fabricated from a metal with circulation channels for refrigerant embedded in the walls of the passageway. The stent is thereby chilled below its transformation temperature as it is pulled through the device. In this case the stent may advantageously be pulled fairly slowly to allow complete temperature equilibration.
There are many different possibilities for the cross-sectional shape of the passageway of the loading device 20. FIG. 3 depicts a cross-section of a second embodiment of the invention, showing a loading device 60, with a block 62, a first diameter 66 and a second diameter 68. In this embodiment, however, the second diameter 68 is not round and is instead a rounded "star" shape.
This design illustrates an additional way to crimp the stent 50 onto or into a catheter as the cross-sectional shape of the passageway promotes folding of the sleeve 30 and/or of the stent 50, itself. It is spec~cally contemplated that the number of lobes of the cross-section be related to the underlying structure of the stent so that folding and crimping is induced in the most favorable areas of the stent or encapsulated stent.
FIG. 4 shows a third embodiment of the present invention comprising the loading device 20, the sleeve 30, and the stent 50. This embodiment is different, however, in that the catheter 80 is a balloon catheter. The balloon tip of the catheter 80 is inserted inside of the tube created by the second diameter 28 until the distal end of the catheter 80, bearing by a deflated balloon 84, is near the first diameter 26 of the loading device 20. In FIG. 4, the scent 50 is shown in the process of being compressed. The sleeve 30 is pulled through the loading device 20 so that the stent 50 begins to compress around the balloon 84. At this point the end 34 of the sleeve 30 reaches the distal tip of the catheter 80 and both the stent 50 and the catheter 80 are pulled through the passageway so that the stent 50 is securely crimped around the balloon portion 84 of the catheter 80 as shown in FIG. 5. Again, the end result is the sterile catheter 80 with the stent 50 loaded onto it, encased in the bag-sleeve 30.
_g_ Again, the bag 30 is removed before the catheter 80 is used on a patient. As discussed above, the sleeve 30 can be removed in a variety of ways including pulling a pre-designed tear strip. The sheath 30 can be removed prior to catheter insertion; alternatively, it can be composed of a polymer that .
spontaneously dissolves in the aqueous milieu of the patient's blood stream.
FIG. 6 shows an alternate embodiment where the sleeve 30 is pulled through the catheter. In this embodiment the sleeve 30 can be closed at both ends. A pull string 70 is attached to the proximal end of the sleeve 30 and threaded through the catheter. The string is then used to pull the stem 50 into the end of the catheter 80. If the sleeve 30 is equipped with perforations, the pull string 70 can be used to remove the sleeve 30 from the stent either before or after the catheter 80 is inserted into a patient.
FIG. 7 shows the embodiment of FIG. 1 being used with an open-ended sleeve. All of the embodiments of the current invention can be used with either close or open ended sheaths. The stent or the inner surface of the sleeve are advantageously coated with a ti~aterial like rosin to prevent or control slippage of the sleeve relative to the stent.
Having thus describe a preferred embodiment of a sleeved stent loading apparatus, it will be apparent by those skilled in the art how certain advantages of the present invention have been achieved. It should also be appreciated that various modifications, adaptations, and alternative embodiments thereof may be made within the scope and spirit of the present invention. The described embodiments are to be considered illustrative rather than restrictive. The invention is further defined by the following claims.
~,11M~~ARY OF THE INVENTION
The present invention compresses and loads stents onto or into a catheter by using either an open-ended sleeve to prevent stress to the stent or a closed-end bag prevent stress and preserve sterilely.
It is an object of this invention to minimize the frictional (shear) forces acting on the wall of a stent during the process of loading a stent onto or into a catheter.
It is a further object of the present invention to provide a procedure for crimping a stent onto or into a catheter while maintaining stent sterility.
These and additional objects are accomplished using either an open-ended sleeve or a close-ended sleeve ("bag") and a loading device. First, a full-sized stent is placed into a flexible sleeve (either open or close-ended).
This step is contemplated to be carried out by the manufacturer. The enclosed stent would be inserted into sterile packaging and subjected to routine sterilization procedures (e.g., radiation or chemical sterilization). Alternatively, sterile sleeves can be provided for "field loading" of the scent. The sleeve or bag can consist of many different materials, such as polyethylene, polytetrafluoroethylene ("PTFE") or especially expanded polytetrafluoroethylene ("ePTFE"). The bag may be advantageously treated with various coatings to lubricate passage of the scent through the funnel. In the case of an open-ended sleeve, the inner surface is advantageously coated with a biocompatible "tackyn coating to enhance friction between the sleeve and the stent. Typically, the sleeve or bag is longer than the stent so that the end of the bag or sleeve can be threaded through the small orifice of the loading device and grasped: The catheter to be loaded is then placed into the loading device so that the distal end of the catheter lies near the proximal {small) orifice of the funnel-shaped loading device. The sterile outer packaging material is opened, and the bag with the stent inside is then inserted over the catheter end and the bag and scent are simultaneously pulled through the loading device from large orifice to small orifice: This results in a catheter with a stent uniformly compressed onto its end and with the bag over the end to maintain sterile conditions. Although the loading procedure nom~ally takes place in a sterile operating environment, the sleeve provides an additional barrier to guarantee stent sterility. Even an open ended sleeve provided significant protection against contamination.
Because the scent is left in the patient indefinitely, even a single pathogenic organism might cause serious complications. Immediately before the stmt is inserted into the patient, the bag can be removed. Removal of the bag or sleeve can consist of sliding it back off of the device, or tearing it off using a tear strip (e.g., an embedded length of fiber that can be pulled to cut open the sheath). Also, tear away seams or perforations can be incorporated into the bag or sleeve for easy removal.
Providing a buffer layer of sleeve material over the scent is beneficial in at least two ways. First, the layer acts to minimize the frictional forces to which the stent is subjected in being reduced it from full diameter. Second, by pulling the bag or sleeve rather than directly pushing or pulling the stent, the longitudinally applied force is avoided, thereby reducing stresses to the stent.
As a result there is less chance of perforating any covering (e.g., an encapsulated stent) or of damaging the scent struts through bending or fracture.
The loading device consists of a block of material traversed by a passageway of varying diameter {e.g., funnel-shaped). At the proximal end of the block, the passageway has its widest first diameter. This wide first diameter tapers down to a second smaller diameter, thereby forming a funnel shape.
The second diameter runs throughout the remainder of the block forming a tubular shape. The cross-section of the second diameter can be circular or can t be other shapes such as a rounded star (e.g., a star shape wherein the arms have rounded tips) to aid in the compression and folding of the bag andlor enclosed stent. The funnel-shaped passageway can be produced by drilling or cutting a solid block of material (plastic such as an acrylic or metal such as aluminum). The passageway can also be produced by well-known methods of molding. Alternatively, the funnel-shape can be constructed from formed sheet metal, etc.
This device is useful not only for loading a stent g~ a catheter, as described above, but can also be used to load a stent i o a catheter. in this case, the catheter is placed into a port at the distal end of the loading device.
This port has a diameter larger than the second diameter and is large enough to accommodate a catheter designed for loading stents inside. The bagged stent is then pulled through the device and into the catheter. The bag or sleeve is pulled over the catheter at the same time and remains in place until the catheter is used on a patient. The bag or sleeve can be sealed (closed) at the distal end at least. (f the sleeve is to be pulled over the catheter (rather like putting on a sock) as described above, then the proximal end, at least, must be left open. Although the sleeve may be open at both ends, it is advantageous to enclose the stent by sealing both ends to allow for the stent to be sterilized.
Then one end can be sterilely opened just before compression of the stent.
Alternatively, the bag can be split to pass over and around the end of the catheter. If the sleeve is to be pulled through the catheter, it is not necessary to even have even a single open end, and the bag can remain completely closed to ensure sterility.
BRIEF DESCRIPTION OF TH DRAWINGS
FIG. 1 is a longitudinal-sectional view of a first embodiment of a stem loading apparatus.
FIG. 2 is a cross-sectional view of FIG. 1 taken at 2-2.
a WO flfl/18329 PCTIUS99/22812 FIG. 3 is a cross-sectional view of an alternative embodiment of the stent loading device (also taken at a point corresponding to 2-2).
FIG. 4 is a longitudinal-sectional view of an embodiment of the scent loading apparatus in the initial phases of compressing a stent onto an~
angioplasty balloon.
FiG. 5 shows the device of FIG. 4 after completion of the scent compression.
FIG. 6 is a longitudinal-sectional view of an additional embodiment of the stent loading apparatus wherein the bag is pulled through the catheter.
FIG. 7 is a longitudinal-sectional view of the embodiment of FIG. 1 used with an open-ended sleeve.
DETAILED DESrRIPTION OF THE PREFERRED EMBODIMENT
Referring now to the drawings, in which like reference numbers represent similar or identical structures throughout, FIG. 1 depicts a stent loading apparatus 10 consisting of a loading device 20 and a closed ended sleeve 30 (this and all other embodiments can be used with an open-ended sleeve as well). A stent 50 and a catheter 40 in which the stent 50 is loaded are also shown. The loading device 20 is a block 22 which has at its center a passageway of varying diameter. This passageway can be coated with PTFE
or other low friction material that facilitates the movement of the bag-enclosed scent 50. At the proximal end of the block 22, the passageway has its largest diameter 26. From there the passageway tapers to a second diameter 28 thus forming a funnel shape. The second diameter 28 is constant to the distaff end of the block, forming a tube.
FIG. 2 shows a cross-section of the loading device 20. At the distal end of the block 22, the tube-like section of the passageway widens to a third _7_ diameter 24 to permit the docking of a catheter 40. Pulling the stent 50 through the loading device 20 compresses it from its full diameter to the illustrated smaller diameter. To accomplish this the stent 50 is placed inside of the sleeve 30 prior to being pulled through the passageway. As mentioned above, there .
are advantages to using a sleeve 30 which is initially closed at both ends. In such a case one end is opened prior to the compression process leaving only a single closed end 34. The sleeve 30 is pulled through the loading device 20 by extensions 32 of sleeve material located near the open end. As the sleeve 30 is pulled through the loading device 20, compressing the stent, it is also pulled over the end of the catheter 40. The sleeve 30 is pulled until the stent 50 is entirely inside the catheter 40, where it comes in contact with a catheter unloading arm or plunger 44. Following loading the sleeve 30 can remain over the end of the catheter 40 with its closed end 34 sealing the stent 50 from the outside. Of course, the bag 30 must be torn off prior to insertion of the catheter into the patient.
The sleeve 30 can be made from any of a number of plastic films such as polyethylene, polyvinyl, polyurethane, cellulose, and PTFE. PTFE is especially preferred because it is "slippery". Alternately, other plastic films can be coated with antifriction materials. It may also be advantageous to coat the inside surface with a slightly plastic or tacky composition to "grip" the stent and control the movement of the film relative to the scent so that forces are uniformly applied to the length of the stent 30 as opposed to being applied just by the end 34 of the bag. With an open-ended sleeve as shown in FIG. 7 such a "gripping" coating is especially important. Expanded PTFE is especially preferred because this material is readily permeable to air. Thus, a sleeve that is closed at both ends can be readily compressed since the air easily escapes through the ePTFE. If a closed sleeve of other plastic films is used, special provision must be made for escape of trapped air during the compression process.
_$-In the case of stents fabricated from shape memory alloy the passageway can advantageously be fabricated from a metal with circulation channels for refrigerant embedded in the walls of the passageway. The stent is thereby chilled below its transformation temperature as it is pulled through the device. In this case the stent may advantageously be pulled fairly slowly to allow complete temperature equilibration.
There are many different possibilities for the cross-sectional shape of the passageway of the loading device 20. FIG. 3 depicts a cross-section of a second embodiment of the invention, showing a loading device 60, with a block 62, a first diameter 66 and a second diameter 68. In this embodiment, however, the second diameter 68 is not round and is instead a rounded "star" shape.
This design illustrates an additional way to crimp the stent 50 onto or into a catheter as the cross-sectional shape of the passageway promotes folding of the sleeve 30 and/or of the stent 50, itself. It is spec~cally contemplated that the number of lobes of the cross-section be related to the underlying structure of the stent so that folding and crimping is induced in the most favorable areas of the stent or encapsulated stent.
FIG. 4 shows a third embodiment of the present invention comprising the loading device 20, the sleeve 30, and the stent 50. This embodiment is different, however, in that the catheter 80 is a balloon catheter. The balloon tip of the catheter 80 is inserted inside of the tube created by the second diameter 28 until the distal end of the catheter 80, bearing by a deflated balloon 84, is near the first diameter 26 of the loading device 20. In FIG. 4, the scent 50 is shown in the process of being compressed. The sleeve 30 is pulled through the loading device 20 so that the stent 50 begins to compress around the balloon 84. At this point the end 34 of the sleeve 30 reaches the distal tip of the catheter 80 and both the stent 50 and the catheter 80 are pulled through the passageway so that the stent 50 is securely crimped around the balloon portion 84 of the catheter 80 as shown in FIG. 5. Again, the end result is the sterile catheter 80 with the stent 50 loaded onto it, encased in the bag-sleeve 30.
_g_ Again, the bag 30 is removed before the catheter 80 is used on a patient. As discussed above, the sleeve 30 can be removed in a variety of ways including pulling a pre-designed tear strip. The sheath 30 can be removed prior to catheter insertion; alternatively, it can be composed of a polymer that .
spontaneously dissolves in the aqueous milieu of the patient's blood stream.
FIG. 6 shows an alternate embodiment where the sleeve 30 is pulled through the catheter. In this embodiment the sleeve 30 can be closed at both ends. A pull string 70 is attached to the proximal end of the sleeve 30 and threaded through the catheter. The string is then used to pull the stem 50 into the end of the catheter 80. If the sleeve 30 is equipped with perforations, the pull string 70 can be used to remove the sleeve 30 from the stent either before or after the catheter 80 is inserted into a patient.
FIG. 7 shows the embodiment of FIG. 1 being used with an open-ended sleeve. All of the embodiments of the current invention can be used with either close or open ended sheaths. The stent or the inner surface of the sleeve are advantageously coated with a ti~aterial like rosin to prevent or control slippage of the sleeve relative to the stent.
Having thus describe a preferred embodiment of a sleeved stent loading apparatus, it will be apparent by those skilled in the art how certain advantages of the present invention have been achieved. It should also be appreciated that various modifications, adaptations, and alternative embodiments thereof may be made within the scope and spirit of the present invention. The described embodiments are to be considered illustrative rather than restrictive. The invention is further defined by the following claims.
Claims (9)
1. An apparatus for loading a catheter assembly, comprising a flexible sleeve (30), a stent (50) within the sleeve (30), a loading device (20) including a passageway that tapers from a larger first diameter (26, 66) to a smaller second diameter (28, 68), and a means for pulling the flexible sleeve through the passageway (32, 70) so that the sleeve (30) and the stent (50) are compressed by the passageway tapering from the first diameter (26, 66) to the second diameter (28, 68), characterized in that the flexible sleeve (30) envelopes the stent (50) placed within.
2. The apparatus described in Claim 1, wherein said sleeve (30) further includes a tear strip for opening the sleeve.
3. The apparatus described in Claim 1, wherein said sleeve (30) further includes seams or perforations for opening the sleeve.
4. The apparatus described in Claim 1, wherein said sleeve (30) further comprises a coated interior to hold said stent (50) in position and a coated exterior to minimize friction,
5. The apparatus described in Claim 1, wherein a cross-section of said second diameter (28) is circular.
6. The apparatus described in Claim 1, wherein a cross-section of said second diameter (68) shows a plurality of rounded lobes.
7. The apparatus described in Claim 6, wherein spacing of the lobes is selected to induce folding during compression of the stent
8. The apparatus described in Claim 1, wherein said device (20) further comprises an intermediate diameter (24) at the distal end of said passageway which is larger than said second diameter (28, 68) but smaller than said first diameter (26, 66), and wherein said intermediate diameter (24) is sized to accommodate a catheter (40, 80) into which a stent (50) is to be loaded.
9. A method for loading a scent (50) onto or into a catheter, wherein a loading device (20) is provided comprising a passageway that tapers from a larger first diameter (26, 66) to a smaller second diameter (28, 68), characterized in that the steps comprise making a sleeved stent by enveloping a stent (50) in a flexible sleeve (34);
placing the sleeved scent into the loading device (20) in the tapered portion of the passageway so that an end of the sleeve (30} can be grasped from a smaller diameter end of the passageway;
placing a catheter at or into the smaller diameter end of the passageway; and pulling the sleeved stent through the smaller diameter end of the passageway so that the stent (50) is reduced in diameter and moved onto or into the catheter.
placing the sleeved scent into the loading device (20) in the tapered portion of the passageway so that an end of the sleeve (30} can be grasped from a smaller diameter end of the passageway;
placing a catheter at or into the smaller diameter end of the passageway; and pulling the sleeved stent through the smaller diameter end of the passageway so that the stent (50) is reduced in diameter and moved onto or into the catheter.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10240498P | 1998-09-30 | 1998-09-30 | |
US60/102,404 | 1998-09-30 | ||
US09/310,763 | 1999-05-12 | ||
US09/310,763 US6096027A (en) | 1998-09-30 | 1999-05-12 | Bag enclosed stent loading apparatus |
PCT/US1999/022812 WO2000018329A1 (en) | 1998-09-30 | 1999-09-30 | Apparatus for loading a bag enclosed stent on a catheter |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2345738A1 true CA2345738A1 (en) | 2000-04-06 |
Family
ID=26799345
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002345738A Abandoned CA2345738A1 (en) | 1998-09-30 | 1999-09-30 | Apparatus for loading a bag enclosed stent on a catheter |
Country Status (8)
Country | Link |
---|---|
US (1) | US6096027A (en) |
EP (1) | EP1117349B1 (en) |
JP (1) | JP2002525167A (en) |
CA (1) | CA2345738A1 (en) |
DE (1) | DE69933881T2 (en) |
ES (1) | ES2274641T3 (en) |
MX (1) | MXPA01003282A (en) |
WO (1) | WO2000018329A1 (en) |
Families Citing this family (91)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IES81060B2 (en) | 1997-11-07 | 2000-01-12 | Salviac Ltd | An embolic protection device |
US7491216B2 (en) | 1997-11-07 | 2009-02-17 | Salviac Limited | Filter element with retractable guidewire tip |
US6143021A (en) | 1998-07-10 | 2000-11-07 | American Medical Systems, Inc. | Stent placement instrument and method of assembly |
ATE382310T1 (en) * | 1999-01-22 | 2008-01-15 | Gore Enterprise Holdings Inc | METHOD FOR COMPRESSING AN ENDOPROSTHESIS |
US6261316B1 (en) | 1999-03-11 | 2001-07-17 | Endologix, Inc. | Single puncture bifurcation graft deployment system |
US8034100B2 (en) | 1999-03-11 | 2011-10-11 | Endologix, Inc. | Graft deployment system |
GB2369575A (en) | 2000-04-20 | 2002-06-05 | Salviac Ltd | An embolic protection system |
US6773446B1 (en) | 2000-08-02 | 2004-08-10 | Cordis Corporation | Delivery apparatus for a self-expanding stent |
US6589273B1 (en) * | 2000-10-02 | 2003-07-08 | Impra, Inc. | Apparatus and method for relining a blood vessel |
US7807210B1 (en) | 2000-10-31 | 2010-10-05 | Advanced Cardiovascular Systems, Inc. | Hemocompatible polymers on hydrophobic porous polymers |
US6709449B2 (en) | 2001-01-12 | 2004-03-23 | Mayo Foundation For Medical Education And Research | Stent treatment apparatus and method |
US6756007B2 (en) * | 2001-04-04 | 2004-06-29 | Bard Peripheral Vascular, Inc. | Method for preparing an implantable prosthesis for loading into a delivery apparatus |
US20020161376A1 (en) * | 2001-04-27 | 2002-10-31 | Barry James J. | Method and system for delivery of coated implants |
US6926732B2 (en) * | 2001-06-01 | 2005-08-09 | Ams Research Corporation | Stent delivery device and method |
US20030050648A1 (en) | 2001-09-11 | 2003-03-13 | Spiration, Inc. | Removable lung reduction devices, systems, and methods |
US6805703B2 (en) | 2001-09-18 | 2004-10-19 | Scimed Life Systems, Inc. | Protective membrane for reconfiguring a workpiece |
US6592594B2 (en) * | 2001-10-25 | 2003-07-15 | Spiration, Inc. | Bronchial obstruction device deployment system and method |
US6929637B2 (en) | 2002-02-21 | 2005-08-16 | Spiration, Inc. | Device and method for intra-bronchial provision of a therapeutic agent |
US20030216769A1 (en) | 2002-05-17 | 2003-11-20 | Dillard David H. | Removable anchored lung volume reduction devices and methods |
US20030181922A1 (en) | 2002-03-20 | 2003-09-25 | Spiration, Inc. | Removable anchored lung volume reduction devices and methods |
US20030236565A1 (en) * | 2002-06-21 | 2003-12-25 | Dimatteo Kristian | Implantable prosthesis |
US20040010209A1 (en) * | 2002-07-15 | 2004-01-15 | Spiration, Inc. | Device and method for measuring the diameter of an air passageway |
US20040059263A1 (en) * | 2002-09-24 | 2004-03-25 | Spiration, Inc. | Device and method for measuring the diameter of an air passageway |
US6702845B1 (en) | 2003-01-17 | 2004-03-09 | Gore Enterprise Holdings, Inc. | Compacted implantable medical devices and method of compacting such devices |
US7096554B2 (en) * | 2003-04-04 | 2006-08-29 | Boston Scientific Scimed, Inc. | Protective loading of stents |
US7100616B2 (en) | 2003-04-08 | 2006-09-05 | Spiration, Inc. | Bronchoscopic lung volume reduction method |
US7533671B2 (en) | 2003-08-08 | 2009-05-19 | Spiration, Inc. | Bronchoscopic repair of air leaks in a lung |
US20050049666A1 (en) * | 2003-08-26 | 2005-03-03 | Chien Thomas Yung-Hui | Stent delivery system |
US7207204B2 (en) * | 2004-02-26 | 2007-04-24 | Boston Scientific Scimed, Inc. | Crimper |
US8220127B2 (en) * | 2004-03-10 | 2012-07-17 | Ashwood River Pty Ltd | Replacement of steering rack boots |
US7209044B2 (en) * | 2004-05-04 | 2007-04-24 | Reustle M Charles | System and method for elimination of bedwetting behavior |
US7765670B2 (en) * | 2004-08-13 | 2010-08-03 | Boston Scientific Scimed, Inc. | Method to simultaneously load and cover self expanding stents |
US7316148B2 (en) | 2005-02-15 | 2008-01-08 | Boston Scientific Scimed, Inc. | Protective sheet loader |
US7717936B2 (en) * | 2005-04-18 | 2010-05-18 | Salviac Limited | Device for loading an embolic protection filter into a catheter |
US7503105B2 (en) * | 2005-04-19 | 2009-03-17 | Boston Scientific Scimed, Inc. | Loading stent with compressed air |
JP2008538940A (en) * | 2005-04-29 | 2008-11-13 | アルテリアル リモデリング テクノロジーズ, インコーポレイテッド | Stent crimping |
US8043323B2 (en) | 2006-10-18 | 2011-10-25 | Inspiremd Ltd. | In vivo filter assembly |
US8961586B2 (en) * | 2005-05-24 | 2015-02-24 | Inspiremd Ltd. | Bifurcated stent assemblies |
EP3556319A1 (en) | 2005-05-24 | 2019-10-23 | Inspire M.D Ltd. | Stent apparatuses for treatment via body lumens |
US7691151B2 (en) | 2006-03-31 | 2010-04-06 | Spiration, Inc. | Articulable Anchor |
US10137015B2 (en) * | 2006-10-18 | 2018-11-27 | Inspiremd Ltd. | Knitted stent jackets |
US20100324664A1 (en) * | 2006-10-18 | 2010-12-23 | Asher Holzer | Bifurcated Stent Assemblies |
EP2083902B1 (en) * | 2006-10-18 | 2017-08-30 | Inspiremd Ltd. | Filter assemblies |
CN101578078B (en) | 2006-11-22 | 2013-01-02 | 印斯拜尔Md有限公司 | Optimized stent jacket |
WO2008109822A2 (en) * | 2007-03-07 | 2008-09-12 | University Of South Florida | Device for percutaneously creating a fetal iatrogenic gastroschisis |
US8100959B2 (en) * | 2007-03-09 | 2012-01-24 | Pulmonx Corporation | Loading device for a pulmonary implant |
US8764816B2 (en) * | 2007-05-07 | 2014-07-01 | W. L. Gore & Associates, Inc. | Stent delivery and deployment system |
US8043301B2 (en) | 2007-10-12 | 2011-10-25 | Spiration, Inc. | Valve loader method, system, and apparatus |
EP2641572B1 (en) | 2007-10-12 | 2019-07-24 | Spiration Inc. | Valve loader method, system, and apparatus |
CA2701576C (en) | 2007-10-17 | 2016-06-21 | Angiomed Gmbh & Co. Medizintechnik Kg | Delivery system for a self-expanding device for placement in a bodily lumen |
WO2009052432A2 (en) | 2007-10-19 | 2009-04-23 | Coherex Medical, Inc. | Medical device for modification of left atrial appendange and related systems and methods |
US8663320B2 (en) * | 2007-12-04 | 2014-03-04 | Cook Medical Technologies Llc | Storage and loading system for implantable medical devices |
CA2703922A1 (en) | 2007-12-04 | 2009-06-11 | Cook Incorporated | Tapered loading system for implantable medical devices. |
EP2242455A1 (en) * | 2007-12-28 | 2010-10-27 | Boston Scientific Scimed, Inc. | Prosthesis loading delivery and deployment apparatus |
US8221494B2 (en) | 2008-02-22 | 2012-07-17 | Endologix, Inc. | Apparatus and method of placement of a graft or graft system |
EP2494943B1 (en) * | 2008-04-09 | 2017-05-17 | Cook Medical Technologies LLC | Loading apparatus and method for expandable intraluminal medical devices |
US8236040B2 (en) | 2008-04-11 | 2012-08-07 | Endologix, Inc. | Bifurcated graft deployment systems and methods |
US9687370B2 (en) | 2008-05-09 | 2017-06-27 | C.R. Bard, Inc. | Method of loading a stent into a sheath |
GB0815339D0 (en) | 2008-08-21 | 2008-10-01 | Angiomed Ag | Method of loading a stent into a sheath |
US20100036361A1 (en) * | 2008-06-20 | 2010-02-11 | Pulmonx | System and method for delivering multiple implants into lung passageways |
EP2293838B1 (en) | 2008-07-01 | 2012-08-08 | Endologix, Inc. | Catheter system |
CH699079A1 (en) * | 2008-07-04 | 2010-01-15 | Arik Zucker | Arrangement consisting of a stent and a package. |
GB0823716D0 (en) | 2008-12-31 | 2009-02-04 | Angiomed Ag | Stent delivery device with rolling stent retaining sheath |
WO2010081033A1 (en) | 2009-01-08 | 2010-07-15 | Coherex Medical, Inc. | Medical device for modification of left atrial appendage and related systems and methods |
EP2429452B1 (en) | 2009-04-28 | 2020-01-15 | Endologix, Inc. | Endoluminal prosthesis system |
US10631969B2 (en) | 2009-06-17 | 2020-04-28 | Coherex Medical, Inc. | Medical device for modification of left atrial appendage and related systems and methods |
CA2958338C (en) | 2009-06-17 | 2019-04-16 | Coherex Medical, Inc. | Medical device for modification of left atrial appendage and related systems and methods |
US9351716B2 (en) * | 2009-06-17 | 2016-05-31 | Coherex Medical, Inc. | Medical device and delivery system for modification of left atrial appendage and methods thereof |
US10064628B2 (en) | 2009-06-17 | 2018-09-04 | Coherex Medical, Inc. | Medical device for modification of left atrial appendage and related systems and methods |
US9649115B2 (en) | 2009-06-17 | 2017-05-16 | Coherex Medical, Inc. | Medical device for modification of left atrial appendage and related systems and methods |
WO2011022658A1 (en) | 2009-08-20 | 2011-02-24 | Cook Incorporated | Loading apparatus and system for expandable intraluminal medical devices |
GB0921238D0 (en) | 2009-12-03 | 2010-01-20 | Angiomed Ag | Stent device delivery system and method of making such |
GB0921240D0 (en) | 2009-12-03 | 2010-01-20 | Angiomed Ag | Stent device delivery system and method of making such |
GB0921236D0 (en) | 2009-12-03 | 2010-01-20 | Angiomed Ag | Stent device delivery system and method of making such |
GB0921237D0 (en) | 2009-12-03 | 2010-01-20 | Angiomed Ag | Stent device delivery system and method of making such |
EP2635241B1 (en) | 2010-11-02 | 2019-02-20 | Endologix, Inc. | Apparatus for placement of a graft or graft system |
GB201020373D0 (en) | 2010-12-01 | 2011-01-12 | Angiomed Ag | Device to release a self-expanding implant |
US8808350B2 (en) | 2011-03-01 | 2014-08-19 | Endologix, Inc. | Catheter system and methods of using same |
US8795241B2 (en) | 2011-05-13 | 2014-08-05 | Spiration, Inc. | Deployment catheter |
EP4324409A3 (en) | 2011-11-01 | 2024-03-13 | Coherex Medical, Inc. | Medical device for modification of left atrial appendage and related systems and methods |
WO2013120082A1 (en) | 2012-02-10 | 2013-08-15 | Kassab Ghassan S | Methods and uses of biological tissues for various stent and other medical applications |
EP2953580A2 (en) | 2013-02-11 | 2015-12-16 | Cook Medical Technologies LLC | Expandable support frame and medical device |
US9351860B2 (en) | 2013-03-14 | 2016-05-31 | Cook Medical Technologies Llc | Loading tool for capturing stent points |
JP2018524025A (en) | 2015-06-30 | 2018-08-30 | エンドロジックス、インク | Lock assembly for coupling guidewire to delivery system |
JP6558141B2 (en) * | 2015-08-20 | 2019-08-14 | 日本ゼオン株式会社 | Method for manufacturing stent delivery catheter and method for moving self-expandable stent between tubes |
CN109152634A (en) | 2016-05-09 | 2019-01-04 | 扩凡科技有限公司 | For storing and loading the facility of Self-expanded stent class device |
WO2018125802A1 (en) | 2016-12-29 | 2018-07-05 | Boston Scientific Scimed, Inc. | Method for loading a stent into a delivery device |
AU2018427566B2 (en) * | 2018-06-14 | 2022-07-28 | W. L. Gore & Associates, Inc. | Systems and methods for on-device constraining mechanism construction |
US20210259836A1 (en) | 2018-07-06 | 2021-08-26 | Cook Medical Technologies Llc | Storage devices, loading devices, delivery systems, kits, and associated methods |
US11369355B2 (en) | 2019-06-17 | 2022-06-28 | Coherex Medical, Inc. | Medical device and system for occluding a tissue opening and method thereof |
US11812969B2 (en) | 2020-12-03 | 2023-11-14 | Coherex Medical, Inc. | Medical device and system for occluding a tissue opening and method thereof |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3540431A (en) * | 1968-04-04 | 1970-11-17 | Kazi Mobin Uddin | Collapsible filter for fluid flowing in closed passageway |
US4740207A (en) * | 1986-09-10 | 1988-04-26 | Kreamer Jeffry W | Intralumenal graft |
SU1711906A1 (en) * | 1988-01-11 | 1992-02-15 | 2-й Московский государственный медицинский институт им.Н.И.Пирогова | Intravenous filter and device for its implantation |
JP2961287B2 (en) * | 1991-10-18 | 1999-10-12 | グンゼ株式会社 | Biological duct dilator, method for producing the same, and stent |
US5649950A (en) * | 1992-01-22 | 1997-07-22 | C. R. Bard | System for the percutaneous transluminal front-end loading delivery and retrieval of a prosthetic occluder |
US5382260A (en) * | 1992-10-30 | 1995-01-17 | Interventional Therapeutics Corp. | Embolization device and apparatus including an introducer cartridge and method for delivering the same |
US5437083A (en) * | 1993-05-24 | 1995-08-01 | Advanced Cardiovascular Systems, Inc. | Stent-loading mechanism |
EP0657147B1 (en) * | 1993-11-04 | 1999-08-04 | C.R. Bard, Inc. | Non-migrating vascular prosthesis |
US5683451A (en) * | 1994-06-08 | 1997-11-04 | Cardiovascular Concepts, Inc. | Apparatus and methods for deployment release of intraluminal prostheses |
US5693089A (en) * | 1995-04-12 | 1997-12-02 | Inoue; Kanji | Method of collapsing an implantable appliance |
US5626604A (en) * | 1995-12-05 | 1997-05-06 | Cordis Corporation | Hand held stent crimping device |
US5693066A (en) * | 1995-12-21 | 1997-12-02 | Medtronic, Inc. | Stent mounting and transfer device and method |
US5749921A (en) * | 1996-02-20 | 1998-05-12 | Medtronic, Inc. | Apparatus and methods for compression of endoluminal prostheses |
US5672169A (en) * | 1996-04-10 | 1997-09-30 | Medtronic, Inc. | Stent mounting device |
US5630830A (en) * | 1996-04-10 | 1997-05-20 | Medtronic, Inc. | Device and method for mounting stents on delivery systems |
US5800517A (en) * | 1996-08-19 | 1998-09-01 | Scimed Life Systems, Inc. | Stent delivery system with storage sleeve |
US5725519A (en) * | 1996-09-30 | 1998-03-10 | Medtronic Instent Israel Ltd. | Stent loading device for a balloon catheter |
US6447540B1 (en) * | 1996-11-15 | 2002-09-10 | Cook Incorporated | Stent deployment device including splittable sleeve containing the stent |
US5810873A (en) * | 1997-07-15 | 1998-09-22 | Advanced Cardiovascular Systems, Inc. | Stent crimping tool and method of use |
-
1999
- 1999-05-12 US US09/310,763 patent/US6096027A/en not_active Expired - Lifetime
- 1999-09-30 JP JP2000571852A patent/JP2002525167A/en active Pending
- 1999-09-30 DE DE69933881T patent/DE69933881T2/en not_active Expired - Lifetime
- 1999-09-30 EP EP99948525A patent/EP1117349B1/en not_active Expired - Lifetime
- 1999-09-30 CA CA002345738A patent/CA2345738A1/en not_active Abandoned
- 1999-09-30 MX MXPA01003282A patent/MXPA01003282A/en active IP Right Grant
- 1999-09-30 WO PCT/US1999/022812 patent/WO2000018329A1/en active IP Right Grant
- 1999-09-30 ES ES99948525T patent/ES2274641T3/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2002525167A (en) | 2002-08-13 |
DE69933881T2 (en) | 2007-05-31 |
MXPA01003282A (en) | 2002-07-02 |
WO2000018329A1 (en) | 2000-04-06 |
EP1117349A1 (en) | 2001-07-25 |
EP1117349B1 (en) | 2006-11-02 |
ES2274641T3 (en) | 2007-05-16 |
US6096027A (en) | 2000-08-01 |
DE69933881D1 (en) | 2006-12-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6096027A (en) | Bag enclosed stent loading apparatus | |
US6613067B1 (en) | Balloon protector | |
EP0409929B1 (en) | Stent delivery system | |
US6475244B2 (en) | Tunneling device | |
US7169172B2 (en) | Method and apparatus for caged stent delivery | |
US5725519A (en) | Stent loading device for a balloon catheter | |
US8177832B2 (en) | Endoluminal expansion system | |
US5334208A (en) | Method for retrieving stents | |
US20170028170A1 (en) | Guide catheter extension device and methods of use for cardiology procedures | |
US20070078504A1 (en) | Device for placing a vascular implant | |
EP2265224B1 (en) | Loading apparatus and method for expandable intraluminal medical devices | |
US20110208284A1 (en) | Protective sleeve for a medical device, system comprising a protective sleeve and a medical device, and a method for the production thereof | |
US7628795B2 (en) | Tunneling device for use with a graft | |
EP0820259A1 (en) | Rolling membrane stent delivery device | |
JP2007125391A (en) | Method for preparing and employing implant delivery apparatus | |
WO2006071245A1 (en) | Medical devices including metallic films and methods for loading and deploying same | |
US8066756B2 (en) | Containment sleeve and deployment device | |
US20100331878A1 (en) | Method and device for removing a balloon from a body cavity | |
US7108682B2 (en) | Device for protecting a distal portion of a catheter system during shipment and storage | |
US20080086209A1 (en) | Breast augmentation procedure | |
US20020198560A1 (en) | Flush tool and method for flushing air from catheters | |
AU8703698A (en) | A stent insertion tool for use with a catheter sheath introducer | |
MXPA98000980A (en) | Apparatus and method for mounting an endoprotesis on a cate |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FZDE | Discontinued |