US20040059297A1 - Trocar seal system - Google Patents
Trocar seal system Download PDFInfo
- Publication number
- US20040059297A1 US20040059297A1 US10/670,032 US67003203A US2004059297A1 US 20040059297 A1 US20040059297 A1 US 20040059297A1 US 67003203 A US67003203 A US 67003203A US 2004059297 A1 US2004059297 A1 US 2004059297A1
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- US
- United States
- Prior art keywords
- seal
- surgical instrument
- seal member
- aperture
- seal assembly
- 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
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Classifications
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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
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/0293—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors with ring member to support retractor elements
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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
- A61B17/34—Trocars; Puncturing needles
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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
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/0218—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors for minimally invasive surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
- A61B17/3423—Access ports, e.g. toroid shape introducers for instruments or hands
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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
- A61B17/34—Trocars; Puncturing needles
- A61B17/3462—Trocars; Puncturing needles with means for changing the diameter or the orientation of the entrance port of the cannula, e.g. for use with different-sized instruments, reduction ports, adapter seals
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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
- A61B17/34—Trocars; Puncturing needles
- A61B17/3498—Valves therefor, e.g. flapper valves, slide valves
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- 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
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
- A61M39/06—Haemostasis valves, i.e. gaskets sealing around a needle, catheter or the like, closing on removal thereof
-
- 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
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
- A61M39/06—Haemostasis valves, i.e. gaskets sealing around a needle, catheter or the like, closing on removal thereof
- A61M2039/0626—Haemostasis valves, i.e. gaskets sealing around a needle, catheter or the like, closing on removal thereof used with other surgical instruments, e.g. endoscope, trocar
-
- 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
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
- A61M39/06—Haemostasis valves, i.e. gaskets sealing around a needle, catheter or the like, closing on removal thereof
- A61M2039/0673—Haemostasis valves, i.e. gaskets sealing around a needle, catheter or the like, closing on removal thereof comprising means actively pressing on the device passing through the seal, e.g. inflatable seals, diaphragms, clamps
-
- 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
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
- A61M39/06—Haemostasis valves, i.e. gaskets sealing around a needle, catheter or the like, closing on removal thereof
- A61M2039/0686—Haemostasis valves, i.e. gaskets sealing around a needle, catheter or the like, closing on removal thereof comprising more than one seal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/877—With flow control means for branched passages
- Y10T137/87788—With valve or movable deflector at junction
- Y10T137/87804—Valve or deflector is tubular passageway
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
- Y10T156/1056—Perforating lamina
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
- Y10T156/1056—Perforating lamina
- Y10T156/1057—Subsequent to assembly of laminae
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
- Y10T156/1062—Prior to assembly
- Y10T156/1074—Separate cutting of separate sheets or webs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
- Y10T156/1062—Prior to assembly
- Y10T156/1075—Prior to assembly of plural laminae from single stock and assembling to each other or to additional lamina
Abstract
Description
- 1. Technical Field
- The present disclosure relates to seal systems of the type adapted to allow the introduction of a surgical instrument into a patient's body. In particular, the disclosure relates to a seal system to be used in combination with a cannula assembly where the cannula assembly is intended for insertion into a patient's body and an instrument is inserted into the patient's body through the cannula.
- 2. Background Of Related Art
- Laparoscopic procedures are performed in the interior of the abdomen through a small incision, e.g., through narrow endoscopic tubes or cannulas inserted through a is small entrance incision in the skin. Minimally invasive procedures are performed elsewhere in the body, e.g., in the chest, and are often generally referred to as “endoscopic” procedures. Minimally invasive or endoscopic procedures generally require that any instrumentation inserted into the body be sealed, i.e. provisions must be made to ensure that gases do not enter or exit the body through the endoscopic incision as, for example, in surgical procedures in which the surgical region is insufflated. Moreover, endoscopic procedures often require the surgeon to act on organs, tissues, and vessels far removed from the incision, thereby requiring that any instruments used in such procedures be relatively long and narrow.
- For such procedures, the introduction of a tube into certain anatomical cavities such as the abdominal cavity is usually accomplished by use of a system incorporating a trocar and cannula assembly. A cannula assembly is formed of a cannula attached to a cannula housing which generally includes seal assembly adapted to maintain a seal across the opening of the seal assembly both with and without an instrument inserted therethrough. Since the cannula is in direct communication with the internal portion of the seal assembly, insertion of the cannula into an opening in the patient's body so as to reach the inner abdominal cavity should be adapted to maintain a fluid tight interface between the abdominal cavity and the outside atmosphere.
- Since minimally invasive surgical procedures in the abdominal cavity of the body generally require insufflating gases to raise the cavity wall away from vital organs, the procedure is usually initiated by use of a Verres needle through which a gas is introduced into the body cavity. The gas provides a slight pressure which raises the wall surface of the peritoneum away from the vital organs thereby providing an adequate region in which to operate. Thereafter, a trocar assembly which includes a cannula and a trocar or obturator is inserted within the cannula to puncture the peritoneum, i.e. the inner lining of the abdominal cavity wall. The obturator is removed and laparoscopic or endoscopic surgical instruments may then be inserted through the cannula to perform surgery within the abdominal cavity. The cannula may also be utilized for introducing tubes into the body as for drainage purposes, for specimen removal, for diagnostic evaluations, or the like.
- In view of the need to maintain the atmospheric integrity of the inner area of the cavity, a seal assembly for a cannula which permits introduction of an obturator and a wide range of surgical instruments and which maintains the atmospheric integrity of the inner area of the cavity is desirable. Generally, in the context of insufflatory, minimally invasive surgical procedures, cannula assemblies include structure(s) that satisfy two sealing requirements. The first requirement is to provide a substantially fluid tight seal when an instrument is not present in the cannula. The second requirement is to provide a substantially fluid tight seal when an instrument is being introduced into or already is present in the cannula. In this regard, there have been a number of attempts in the prior art to provide such sealing requirements.
- U.S. Pat. No. 4,655,752 to Honkanen et al. teaches a cannula including a housing and first and second seal members. The first seal member is conically tapered toward the bottom of the housing and has a circular opening in its center, while the second seal is conically tapered and cup shaped. The second seal includes at least one slit to allow for the passage of instruments.
- U.S. Pat. No. 4,929,235 to Merry et al. teaches a self-sealing catheter introducer having a sealing mechanism to prevent blood or fluid leakage. The sealing mechanism includes a planar sealing element having a slit and a conical sealing element. The sealing elements are each adapted to surround a tube.
- U.S. Pat. Nos. 4,874,377 and 5,064,416 to Newgard et al. relate to a self-occluding intravascular cannula assembly in which an elastomeric valving member is positioned transversely to a housing and is peripherally compressed to cause displacement, distortion and/or rheological flow of the elastomeric material. A frustoconical dilator projection cooperates with the elastomeric valving member in moving the valving member to a non-occluding position.
- U.S. Pat. No. 5,300,033 to Miller suggests a valve construction including an elastic body having a cylindrical wall with first and second walls formed integrally with the cylindrical wall. The second wall includes a slit to permit passage of a surgical instrument and first and second leaflets which define the slit. The leaflets are thicker in cross section to provide an additional closing force at the slit.
- A disadvantage of several known seal systems for cannulas concerns the difficulty encountered in inserting and advancing the surgical instrument through the seal unit. In particular, since known elastomeric seal members are designed to form and maintain a fluid tight seal about the instrument, the aperture or slit within the seal through which the instrument is passed is of relatively small or narrow dimension. Further, portions of the seal member defining the aperture are generally thick in cross-section to provide a sufficient closing force of the seal about the instrument. see, e.g., U.S. Pat. No. 5,300,033. As a consequence of these design considerations, the level of force needed to insert and advance the instrument through the seal aperture is increased, thereby requiring awkward maneuvering on the surgeon's behalf to appropriately position the instrument for the desired surgery. Moreover, known seal systems are generally ineffectual in accommodating instruments of differing diameter while maintaining acceptable insertion forces and facilitating the range of desired surgical manipulations, e.g., angular instrument movements and specimen removal.
- Accordingly, the present disclosure obviates the disadvantages of the prior art by providing a seal unit or assembly for a cannula assembly, which is capable of forming and maintaining a tight seal about instruments of varying diameters inserted through the cannula and which incorporates structure to enhance and facilitate passage of the instrument through the seal unit.
- The present disclosure provides a seal assembly for reception of an elongated surgical instrument, which comprises a body having at least one opening configured and dimensioned to permit entry of an elongated surgical instrument and defining a central longitudinal axis; a seal member formed of a resilient material and defining an aperture therein, the aperture being configured and dimensioned such that insertion of the surgical instrument into the aperture causes the resilient material defining the aperture to resiliently contact the outer surface of the surgical instrument in a substantially fluid tight manner; and a fabric layer juxtaposed relative to the resilient material.
- The seal assembly may further include a coating applied to the seal member to reduce friction between the seal member and surgical instrumentation inserted therein. The coating is preferably a hydrocyclosiloxane membrane prepared by plasma polymerization process.
- In one aspect of the presently disclosed seal assembly a ring member is secured to the seal member and includes a dampening element disposed between a surface of the ring member and a surface of the body.
- Various embodiments are described herein below with reference to the drawings wherein:
- FIG. 1 is a perspective view of one embodiment of a seal assembly constructed in accordance with the present disclosure;
- FIG. 2 is a perspective view with parts separated showing the various structural components of the seal assembly embodiment of FIG. 1;
- FIG. 3 is a perspective view of a fabric portion for incorporation into the seal element of the embodiment of FIG. 1;
- FIG. 4 is a cross-sectional view taken along section line4-4 of FIG. 3;
- FIG. 5 is a perspective view of a fully formed seal member for the seal assembly of FIG. 1;
- FIG. 6 is a cross-sectional view taken along section line6-6 of FIG. 5;
- FIG. 6A is an alternative embodiment of the seal element of FIG. 6;
- FIG. 7 is a cross-sectional view of the seal assembly of FIG. 1;
- FIG. 8 is a perspective view of a trocar assembly having the seal assembly of FIG. 1 removably installed thereon;
- FIG. 9 is a partial cross-sectional view showing the seal body housing taken along section line9-9 of FIG. 8;
- FIG. 10 is an alternative embodiment of the seal assembly of the present disclosure;
- FIG. 11 is a cross-sectional view of a further embodiment of the seal assembly constructed in accordance with the present disclosure;
- FIG. 12 is a perspective view of the seal assembly of FIG. 11;
- FIG. 13 is a perspective view with parts separated of the seal assembly embodiment of FIG. 11;
- FIG. 14 is a cross-sectional view of a further embodiment of the seal assembly constructed in accordance with the present disclosure; and
- FIG. 15 is a perspective view of the seal member of the seal assembly of FIG. 14.
- Referring now in detail to the drawing figures in which like reference numerals identify similar or identical elements, a first embodiment of the seal assembly of the present disclosure is illustrated in FIGS.1-9, and is designated generally as
seal assembly 100. - The presently disclosed seal assembly embodiments contemplate the introduction of various types of surgical instruments adapted for insertion through an elongated trocar assembly. Examples of such instruments include clip appliers, graspers, dissectors, retractors, staplers, laser fibers, photographic devices, endoscopes and laparoscopes, tubes, and the like. Such instruments are collectively referred to herein as “instruments”.
- Referring to FIG. 2,
seal assembly 100 includes aseal member 118 disposed within the seal assembly body orhousing components housing component 116.Seal member 118 has a circular array of holes formed therethrough around the periphery of an inner section 118 b. - A two part ring assembly which includes
ring members seal member 118.Ring member 120 is disposed adjacent the distally facing surface ofseal member 118 andring member 122 is disposed on the proximally facing side ofseal member 118.Ring 120 is provided withholes 120 a and posts 120 b which are alternately disposed around the ring and are aligned with holes 118 a onseal member 118.Ring 122 is provided with posts 122 a and holes 122 b which mate withholes 120 a and posts 120 b ofring member 120, respectively by snap fitting together thereby surrounding inner section 118 b. Althoughrings - A
seal clamp 124 is provided within thehousing component seal member 118 within seal assembly 100 (as best shown in FIG. 7).Seal clamp 124 is provided with four projectingposts 124 a which fit within openings (FIG. 7) formed on the proximal side oflower housing 116.Seal clamp 124 also serves to secure a proximal flange of alower seal 126 which is provided at the distal end oflower housing member 116.Lower seal 126 assists in the securement ofseal assembly 100 tocannula assembly 110. - Referring now to FIGS.3-6,
seal member 118 includes a fabric disc-shapedportion 128 which is preferably disposed on both the proximal and distal sides of inner section 118 b ofseal member 118. Alternatively,fabric section 128 may be disposed on just one of either the proximally facing surface or the distally facing surface of inner portion 118 b, as desired.Fabric portion 128 may be of any suitable fabric, for example, a SPANDEX material containing 20% LYCRA available from Milliken. - In one method of forming the
composite seal member 118 with fabric portion 128 a raw, i.e., uncured polyisoprene plug is first compressed into a flat state, e.g., a flat sheet of polyisoprene. A single layer of fabric is positioned on top of the flattened polyisoprene sheet and compressed into the uncured rubber by any suitable compression process such as, for example, calendering. If it is desired to have fabric on both sides ofseal member 118, this process is repeated on the other side of the polyisoprene sheet. The fabric polyisoprene composite is die cut into circular slugs having an outer diameter and an inner diameter which forms a central aperture. The slugs are placed in a hot compression mold to cure the polyisoprene. This step also serves to extrude the outer portions ofseal member 118 which extend outwardly from inner section 118 b. - During the above-described process the bleed-through of the polyisoprene material into and/or through the fabric layers is regulated by the density of the fabric selected. A greater degree of bleed-through of polyisoprene provides greater resistance to fraying of the fabric upon repeated insertion of instruments through the seal. However, too much bleed-through of the polyisoprene through the fabric will increase friction forces upon instruments being inserted through
seal member 118. - Referring to FIG. 6A, an alternative embodiment of
seal member 118 is shown asseal member 418.Seal member 418 is the same asseal member 118 in most aspects except that inner section 418 b is formed to have fabric layer 428 enveloped between upper andlower polyisoprene layers 418 c and 418 d. - In order to reduce friction between instruments and the seal member,
e.g. seal member 118 orseal member 418, as instruments are inserted throughseal assembly 100, a coating may be applied to the seal member. One coating which has been found particularly effective is a hydrocyclosiloxane membrane prepared by plasma polymerization process. Such a coating is available from Innerdyne, Inc. of Salt Lake City, Utah, U.S.A., and is disclosed in U.S. Pat. No. 5,463,010 which issued to Hu et al. on Oct. 31, 1995, the entire contents of which are hereby incorporated by reference. - Referring to FIGS. 7 and 8,
seal assembly 100 is used in combination with a conventional trocar assembly which includes acannula assembly 110 and atrocar obturator 112. Examples of trocar assemblies in which the present seal assembly may be utilized are disclosed in U.S. Pat. No. 5,603,702 which issued on Feb. 18, 1997 to Smith et al. and U.S. application Ser. No. 08/546,009 filed Oct. 20, 1995 by Smith et al., the entire contents of each of these disclosures are hereby incorporated by reference. -
Seal assembly 100, either alone or in combination with a seal unit/seal assembly internal tocannula assembly 110, provides a substantial seal between a body cavity of a patient and the outside atmosphere both during and subsequent to insertion of an instrument through the cannula. In this manner, insufflation gases are prevented from escaping through the trocar assembly to the outside environment.Seal assembly 100 is capable of accommodating instruments of varying diameter, e.g., from about 5 mm to about 12 mm, while providing a fluid tight seal with the outer diameter of each instrument. The versatility of the presently disclosed seal assembly embodiments greatly facilitate endoscopic surgery, wherein a variety of instruments having different diameters are often needed during a single surgical procedure. -
Seal assembly 100 is preferably detachably mountable to the proximal end ofcannula assembly 110. Thus, the surgeon can remove theseal assembly 100 from thecannula assembly 110 at any time during the surgical procedure and, similarly, mount theseal assembly 100 to the cannula when desired in order to provide a sealing engagement with an instrument to be inserted through the cannula. In addition,seal assembly 100 may be readily adapted for mounting to conventional cannulas of differing structures. The detachability ofseal assembly 100 fromcannula assembly 110 facilitates specimen removal throughcannula assembly 110.Seal assembly 100 includes a housing which is formed by the snap fitting together ofend cap 114 andlower housing member 116. Preferably the housing components ofseal assembly 100 are formed of a polycarbonate material such as ABS available from the General Electric Company. - FIG. 9 shows an instrument having a
shaft 130 inserted throughseal assembly 100 and a duck bill valve or “zero”seal valve 132 which prevents the escape of insufflation gases in the absence of an instrument in the trocar assembly. As shown in FIG. 9,seal member 118 provides a seal about the periphery ofshaft 130. - Referring to FIG. 10, an alternate embodiment of
seal assembly 100 is designated generally asseal assembly 150.Seal assembly 150 is the same asseal assembly 100 except that an innerplanar seal member 152 is disposed in the distal end ofseal assembly 100 to provide additional sealing capability for instruments having larger diameters.Seal element 152 has anaperture 154 which has a diameter larger than the diameter ofaperture 156 ofseal member 118. A further feature illustrated in FIG. 10 is a dampening member such aspad 158 which is secured to the proximal surface ofring 122 to dampen the sound created by the impact of the proximal surface ofring 122 with the inner distal facing surface ofhousing component 114. Other dampening member configurations are also contemplated. For example,ring 122 may be over-molded with material such as polyisoprene so as to envelope part or all of the ring thereby forming a bumper between the ring and the housing component. - Referring to FIGS.11-13, a further embodiment of a seal assembly generally designated as
seal assembly 200 is shown throughout the several views.Seal member 218 is configured in an hourglass shape and preferably includes thefabric portion 228 formed as part ofseal member 218 in a similar manner as described above. The friction reducing coating of a hydrocyclosiloxane membrane prepared by plasma polymerization process noted above may also be utilized to coat the surfaces ofseal member 218. - Referring now to FIGS. 14 and 15, a further embodiment of the seal assembly generally designated as
seal assembly 300 is shown.Seal member 318 is similar to sealmember 118 except that inner portion 318 b is formed in a conical shape with a wider opening directed towards a proximal end ofseal assembly 300 and a narrower opening directed towards distal end ofseal assembly 300. The friction reducing coating of a hydrocyclosiloxane membrane prepared by plasma polymerization process noted above may also be utilized to coat the surfaces ofseal member 318. - It will be understood that various modifications may be made to the embodiments shown herein. Therefore, the above description should not be construed as limiting, but merely as exemplifications of preferred embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the presently disclosed seal assemblies.
Claims (4)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/670,032 US20040059297A1 (en) | 1997-05-02 | 2003-09-24 | Trocar seal system |
US10/718,195 US7896846B2 (en) | 1997-05-02 | 2003-11-20 | Trocar seal system |
US12/546,993 US8002934B2 (en) | 1997-05-02 | 2009-08-25 | Trocar seal system |
US12/546,968 US8192405B2 (en) | 1997-05-02 | 2009-08-25 | Trocar seal system |
US12/898,003 US8267898B2 (en) | 1997-05-02 | 2010-10-05 | Trocar seal system |
US13/403,008 US8702657B2 (en) | 1997-05-02 | 2012-02-23 | Trocar seal system |
US14/185,112 US20140171744A1 (en) | 1997-05-02 | 2014-02-20 | Trocar seal system |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
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US4541297P | 1997-05-02 | 1997-05-02 | |
PCT/US1998/008968 WO1998050093A1 (en) | 1997-05-02 | 1998-05-01 | Trocar seal system |
US52795500A | 2000-03-09 | 2000-03-09 | |
US10/165,373 US6702787B2 (en) | 1997-05-02 | 2002-06-06 | Trocar seal system |
US10/670,032 US20040059297A1 (en) | 1997-05-02 | 2003-09-24 | Trocar seal system |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/165,373 Continuation US6702787B2 (en) | 1997-05-02 | 2002-06-06 | Trocar seal system |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/718,195 Continuation US7896846B2 (en) | 1997-05-02 | 2003-11-20 | Trocar seal system |
Publications (1)
Publication Number | Publication Date |
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US20040059297A1 true US20040059297A1 (en) | 2004-03-25 |
Family
ID=21937731
Family Applications (8)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/165,373 Expired - Lifetime US6702787B2 (en) | 1997-05-02 | 2002-06-06 | Trocar seal system |
US10/670,032 Abandoned US20040059297A1 (en) | 1997-05-02 | 2003-09-24 | Trocar seal system |
US10/718,195 Expired - Fee Related US7896846B2 (en) | 1997-05-02 | 2003-11-20 | Trocar seal system |
US12/546,993 Expired - Fee Related US8002934B2 (en) | 1997-05-02 | 2009-08-25 | Trocar seal system |
US12/546,968 Expired - Fee Related US8192405B2 (en) | 1997-05-02 | 2009-08-25 | Trocar seal system |
US12/898,003 Expired - Fee Related US8267898B2 (en) | 1997-05-02 | 2010-10-05 | Trocar seal system |
US13/403,008 Expired - Fee Related US8702657B2 (en) | 1997-05-02 | 2012-02-23 | Trocar seal system |
US14/185,112 Abandoned US20140171744A1 (en) | 1997-05-02 | 2014-02-20 | Trocar seal system |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/165,373 Expired - Lifetime US6702787B2 (en) | 1997-05-02 | 2002-06-06 | Trocar seal system |
Family Applications After (6)
Application Number | Title | Priority Date | Filing Date |
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US10/718,195 Expired - Fee Related US7896846B2 (en) | 1997-05-02 | 2003-11-20 | Trocar seal system |
US12/546,993 Expired - Fee Related US8002934B2 (en) | 1997-05-02 | 2009-08-25 | Trocar seal system |
US12/546,968 Expired - Fee Related US8192405B2 (en) | 1997-05-02 | 2009-08-25 | Trocar seal system |
US12/898,003 Expired - Fee Related US8267898B2 (en) | 1997-05-02 | 2010-10-05 | Trocar seal system |
US13/403,008 Expired - Fee Related US8702657B2 (en) | 1997-05-02 | 2012-02-23 | Trocar seal system |
US14/185,112 Abandoned US20140171744A1 (en) | 1997-05-02 | 2014-02-20 | Trocar seal system |
Country Status (8)
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US (8) | US6702787B2 (en) |
EP (2) | EP1015048B1 (en) |
JP (3) | JP4647727B2 (en) |
AU (1) | AU7279798A (en) |
CA (1) | CA2289101C (en) |
DE (3) | DE69838231T2 (en) |
ES (3) | ES2287857T3 (en) |
WO (1) | WO1998050093A1 (en) |
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