WO2019075326A1 - Manchon d'orifice hémostatique - Google Patents

Manchon d'orifice hémostatique Download PDF

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Publication number
WO2019075326A1
WO2019075326A1 PCT/US2018/055610 US2018055610W WO2019075326A1 WO 2019075326 A1 WO2019075326 A1 WO 2019075326A1 US 2018055610 W US2018055610 W US 2018055610W WO 2019075326 A1 WO2019075326 A1 WO 2019075326A1
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WO
WIPO (PCT)
Prior art keywords
trocar
trocar sleeve
hemostatic port
interior cavity
port cuff
Prior art date
Application number
PCT/US2018/055610
Other languages
English (en)
Inventor
Peter BAIK
Kathleen HALBROOK
Original Assignee
Generations International Asset Management Company Llc D/B/A International Private Bank
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Generations International Asset Management Company Llc D/B/A International Private Bank filed Critical Generations International Asset Management Company Llc D/B/A International Private Bank
Publication of WO2019075326A1 publication Critical patent/WO2019075326A1/fr

Links

Classifications

    • 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
    • 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
    • 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
    • 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
    • A61B2017/3419—Sealing means between cannula and body
    • 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
    • A61B2017/3437—Cannulas with means for removing or absorbing fluid, e.g. wicks or absorbent pads

Definitions

  • the present description relates in general to surgical tools and methods, and more particularly to, for example, without limitation, hemostatic port cuffs.
  • Laparoscopic, thoracoscopic and robotic procedures require the placement of surgical ports, or trocars, to facilitate the introduction of medical tools into the patient.
  • These trocars may migrate after placement, which impedes the ability of the medical tools to reach the appropriate anatomical structures.
  • bleeding occurs around the insertion site. This bleeding can obscure the view of the area to be operated on, deplete the patient of necessary blood, and result in complications related to acute blood loss.
  • the description provided in the background section should not be assumed to be prior art merely because it is mentioned in or associated with the background section.
  • the background section may include information that describes one or more aspects of the subject technology.
  • a hemostatic port cuff in accordance with various aspects of the disclosure, includes a trocar sleeve with a distal end and a proximal end, an inner surface configured to interface with a shaft of a trocar and defining a central opening, and an interior cavity.
  • the hemostatic port cuff further includes inflation tubing with a distal end and a proximal end. The distal end of the inflation tubing is connected to the proximal end of the trocar sleeve and fluidly coupled to the interior cavity.
  • a hemostatic port cuff in accordance with other aspects of the disclosure, includes a trocar sleeve having an interior cavity and a central opening configured to receive a shaft of a trocar.
  • the hemostatic port cuff further includes inflation tubing attached to a first end of the trocar sleeve and fluidly coupled to the interior cavity.
  • the hemostatic port cuff further includes at least one wing extending from a second end of the trocar sleeve.
  • a hemostatic port cuff in accordance with other aspects of the disclosure, includes a trocar sleeve having an interior cavity and a central opening configured to receive a shaft of a trocar.
  • the hemostatic port cuff further includes inflation tubing attached to a first end of the trocar sleeve and fluidly coupled to the interior cavity.
  • the hemostatic port cuff further includes a pressure release valve on the trocar sleeve and coupled to the interior cavity.
  • FIG. 1 illustrates a side view of a trocar, in accordance with various aspects of the disclosure.
  • FIG. 2 illustrates a side view of the trocar of FIG. 1 inserted through the skin of a patient.
  • FIG 3 illustrates a perspective view of a hemostatic port cuff, in accordance with various aspects of the disclosure.
  • FIG 4 illustrates a perspective view of a hemostatic port cuff disposed on the shaft of a trocar, in accordance with various aspects of the disclosure.
  • FIG. 5 illustrates a portion of a hemostatic port cuff that includes wings, in accordance with various aspects of the disclosure.
  • FIG. 6 illustrates a trocar having a hemostatic port cuff inserted through the skin of a patient, in accordance with various aspects of the disclosure.
  • FIG. 7 illustrates a cross-sectional view of a hemostatic port cuff having features that facilitate application to a shaft of a trocar, in accordance with various aspects of the disclosure.
  • not all of the depicted components in each figure may be required, and one or more implementations may include additional components not shown in a figure. Variations in the arrangement and type of the components may be made without departing from the scope of the subject disclosure. Additional components, different components, or fewer components may be utilized within the scope of the subject disclosure.
  • a hemostatic port cuff that helps to address at least some or all of these needs.
  • the hemostatic port cuff is configured to surround a portion of a trocar that is to be inserted through an incision in the skin and subcutaneous tissue of a patient with an inflatable sleeve (sometimes referred to herein as a trocar sleeve).
  • the trocar sleeve includes an interior cavity that is inflatable to expand the sleeve to stabilize the trocar placement with respect to the incision and place pressure onto the incision to minimize bleeding and clot formation.
  • FIG. 1 shows a side view of a trocar that may be used with a hemostatic port cuff in accordance with aspects of the invention.
  • trocar 100 includes a tip 02 such as a bladed tip, a shaft 104 extending between tip 102 and a handle 106, and one or more access points such as access ports 108 and 112.
  • Shaft 104 may include an internal lumen through which other medical tools can be extended.
  • a medical tool such as a cutting tool, a grasping tool, or a suturing or stapling tool can be inserted, via an access point such as access point 1 12, into the internal lumen of shaft 104 and out through an exit port.
  • an inner member 1 10 of trocar 100 that is attached to tip 102 and extends through the internal lumen of shaft 104 can be removed to allow access for medical tools through port 1 12 and the internal lumen of shaft 104 (e.g., through an opening at the location of tip 102 when tip 102 is removed).
  • Port 108 may be a fluid port that allows fluid and/or gas to flow through the internal lumen of the shaft 104.
  • tissue 200 may include the patient's skin and subcutaneous tissue including layers of fat, fascia, muscle, and peritoneum under the patient's skin.
  • Tip 102 may be a sharp or bladed tip that creates incision 206 in tissue 200 as trocar 100 is pushed into tissue 200 (e.g., using handle 106).
  • tip 102 and a portion of shaft 104 have been inserted through tissue 200 into an internal volume 204 of the patient, a portion of shaft 04 is in contact with tissue 200 at incision 206, and a remaining portion of shaft 104 is disposed externally to tissue 200 (e.g., in the external environment 202 of the patient).
  • inner member 110 of trocar 100 that is disposed within shaft 104 and attached to tip 102 can be removed so that other medical tools can be inserted, via the internal lumen in shaft 104, through tissue 200 into internal volume 204 of the patient. Fluid and/or gas from internal volume 204 can be removed via the internal lumen of shaft 104 and port 108.
  • trocar 100 is provided without a hemostatic port cuff.
  • the outer surface 210 of trocar 100 directly contacts tissue 200 at incision 206.
  • trocar 100 may migrate relative to incision 206 (which can impede the ability of the medical tools inserted therethrough to reach the appropriate anatomical structures) and/or bleeding that occurs around the incision 206 at the location of contact with shaft 04 can obscure the view of the area to be operated on, deplete the patient of blood, and/or result in complications related to acute blood loss.
  • trocar 100 may be provided with a hemostatic port cuff configured to be placed onto the portion of the trocar body that will traverse the patient skin and subcutaneous tissue.
  • a perspective view of an example hemostatic port cuff is shown in FIG. 3.
  • hemostatic port cuff 300 may include a trocar sleeve 302.
  • Trocar sleeve 302 has a distal end, a proximal end and an inner surface 316.
  • Inner surface 316 defines a central opening 314 configured to receive shaft 104 of trocar 100 (e.g., such that inner surface 316 is disposed in contact (e.g., interfaces) with outer surface 210 of shaft 104).
  • Trocar sleeve 302 may be formed from an inner layer 306 and an outer layer 308 that are separated by an interior cavity 304.
  • trocar sleeve 302 may be formed from an inner layer 306 and an outer layer 308, which are sealed together (e.g., at the proximal and distal ends) in an airtight manner to create a pocket in between the inner layer and outer layer that forms interior cavity 304.
  • Interior cavity 304 may be fluidly coupled to inflation tubing 310 that has a distal end and a proximal end, such that the distal end of the inflation tubing 310 is connected to the proximal end of the trocar sleeve 302 as shown in FIG. 3.
  • a pressure release valve 312 may also be provided that is attached to the trocar sleeve and fluidly coupled to interior cavity 304.
  • FIG. 4 shows how a portion of shaft 104 of trocar 100 can be inserted into the central opemng 314 of trocar sleeve 302 such that a portion of the outer surface 210 is attached (e.g., via an adhesive, a pressure fit, friction fit, or other attachment or engagement mechanism) to the interior surface of trocar sleeve 302 in the central opening.
  • hemostatic port cuff 300 includes a trocar sleeve 302 with an inner surface 316, which contacts a trocar (in use) and defines central opening 314, and an external surface 317, which contacts a surgical incision (in use).
  • FIG. 4 also shows how inflation tubing 310 may have an interfacing member such as a luer lock 400 connected to the proximal end of the inflation tubing.
  • inflation tubing 310 terminates in luer lock 400 for easy connection or coupling of interior cavity 304 to other devices such as sources of gas or fluid for inflation of trocar sleeve 302.
  • trocar sleeve 302 is inflated like a balloon by adding fluid or gas to the interior cavity 304 through inflation tubing 310 (e.g., by injecting air or another gas or a fluid from a syringe or other source that is coupled to luer lock 400 into the internal cavity inside the sleeve).
  • Outer layer 308 (and/or inner layer 306) can be formed from a flexible or expandable material (e.g., a polymeric biocompatible flexible and/or expandable material such as polyurethane or polyvinyl chloride, a silicone flexible and/or expandable material, or another flexible or expandable material that is biocompatible as would be known to one of ordinary skill in the art).
  • the flexible or expandable material of at least outer layer 308 expands responsive to the introduction of gas or fluid into the internal cavity to cause inflation of trocar sleeve 302 responsive to the introduction of the fluid or gas into the interior cavity 304.
  • outer surface 317 of outer layer 308 is configured to press against an incision 206 in a patient responsive to the expansion.
  • Inner surface 316 may, in some implementations, be provided with an adhesive such as a biocompatible adhesive (e.g., an adhesive including cyanoacrylates, a UV-curable adhesive, or another biocompatible adhesive as would be known to one of ordinary skill in the art) for attaching inner surface 316 to outer surface 210 of shaft 104.
  • a biocompatible adhesive e.g., an adhesive including cyanoacrylates, a UV-curable adhesive, or another biocompatible adhesive as would be known to one of ordinary skill in the art
  • Inner layer 306 may be an elastic layer or may have an attached elastic layer that provides a friction fit of trocar sleeve 302 around shaft 104, without, or in combination with, the adhesive.
  • trocar sleeve 302 may also be provided with one or more wings 402 that are attached to the trocar sleeve at the distal end thereof. As shown, each wing 402 extends away from the distal end of the trocar sleeve at an angle that is non-parallel with the central axis of central opening 314. Wings 402 may be formed from a biocompatible material that is rigid enough to divert fluid from the incision site 206 as would be known to one of ordinary skill in the art. In some implementations, hemostatic port cuff 300 is provided with one large wing that extends from the distal end of the trocar sleeve and which diverts fluid away from the distal opening of the trocar.
  • Wings 402 may be attached to the distal end of trocar sleeve 402 by adhesive or mechanical attachment, or by being integrally formed extensions of the material of outer layer 308 or inner layer 306 of the sleeve. For example, a single wing that runs around the entire circumference of central opening 314 may be provided. In other implementations, hemostatic port cuff 300 is provided with two or more relatively smaller wings 402, as shown in FIG. 4, to divert fluid from the incision site 206.
  • FIG. 5 shows another perspective view of the distal end 500 of trocar sleeve 302 in an implementation in which several wings 402 are attached to the distal end 500 of the trocar sleeve 302 at a plurality of locations that are angularly disposed around the central opening 314.
  • Wings 402 extend from the distal end 500 of trocar sleeve 302 so that, in use, wings 402 are disposed interior to a patient's skin when the trocar 100 with the trocar sleeve is inserted through the patient's skin and the interior cavity 304 is inflated with a fluid or gas. in this configuration, wings 402 are arranged to divert bodily fluids away from medical tools inserted through the trocar.
  • trocar sleeve 302 is inflated as illustrated in FIG. 6.
  • the inflation of trocar sleeve 302 e.g., by injection of gas or fluid into interior cavity 304) enables the sleeve to expand.
  • This pressure can help prevent leakage (e.g., escaping of carbon dioxide, air, and/or fluid from withm volume 204), can help prevent bleeding from incision 206, and/or can help prevent movement of trocar 100 relati ve to the incision.
  • This pressure can also help establish hemostasis at the skm, subcutaneous, and/or muscular layers of the patient's tissue. This pressure can also prevent slippage or travel of the trocar relative to the patient.
  • the distal end 500 of trocar sleeve 302 (and a portion of shaft 104 on which the sleeve is disposed) is disposed within internal volume 204 of the patient, internal to tissue 200.
  • trocar sleeve 302 extends through and maintains contact with tissue 200, and another portion of trocar sleeve 302 is disposed externally to tissue 200 and internal volume 204 (e.g., in the external environment 202 of the patient).
  • medical tools as described herein can be passed through shaft 104 and the central opening 314 of trocar sleeve 302 into and out of the patient.
  • Pressure release valve 312 may be disposed on the portion of trocar sleeve 302 that is external to the patient as shown in FIG. 6 or may be disposed elsewhere on trocar sleeve 302. Pressure release valve 312 may have a cracking pressure that ensures that the pressure within interior cavity 304 and/or applied by the outer surface 317 to tissue 200 does not exceed the threshold at which patient tissue is damaged. For example, pressure release valve may have a cracking pressure of between 10 mmHg and 50 mmHg (e.g., about 30 mmHg).
  • This cracking pressure prevents a first pressure within the interior cavity 304 from generating a second pressure applied by an outer surface 317 of the trocar sleeve 302 to tissue 200 of a patient that exceeds a threshold at which the tissue 200 of the patient is damaged (e.g., the first pressure resulting from an introduction of a gas or a fluid into the interior cavity via the inflation tubmg 310).
  • Wings 402 may be foldable and/or deployable so that the wings are compact or pressed against the outer surface of outer layer 308 during insertion, and extend away from distal end 500 after insertion.
  • wings 402 may fold back against the outer surface of trocar sleeve 302 due to pressure from tissue 200 during insertion through the tissue, and then return to a natural projecting configuration once through tissue 200.
  • wings 402 may be fillable along with interior cavity 304 for deployment responsive to the fluid or gas injected therein, or may be attached to sleeve 302 in an arrangement in which the inflation of sleeve 302 causes deployment of wings 402 to a desired position (e.g., the position shown in FIG. 5).
  • trocar sleeve 302 can be deflated by extracting the fluid or gas from interior cavity 304 of the sleeve (e.g., by pulling air from the sleeve through the inflation tubing 310 using an empty syringe coupled to luer lock 400) to remove the pressure from incision 206 to facilitate extraction of trocar 100 and sleeve 302 from the patient.
  • trocar sleeve 302 is removable from shaft 104 and disposable, so that trocar 100 can be sterilized and reused with a new, sterile trocar sleeve 302 for each procedure.
  • trocar sleeve 302 may be provided for attachment to trocar 100 in a sterile wrapping and/or with wrapping or other features that facilitate attachment of the trocar sleeve to shaft 104.
  • FIG. 7 is a cross-sectional side view that shows how trocar sleeve 302 may, in some scenarios, be provided for installation with a removable cover 700 such as a plastic peelable cover over the adhesive coating on the inner surface the defines central opening 3 4.
  • cover 700 separates the adhesive coating on the inner surface that defines central opening 3 4 from shaft 104 while trocar sleeve 302 is slid onto shaft 104.
  • cover 700 can be removed (e.g., by peeling away a peel tab 701 at the distal end to allow cover 700 to be removed by a pull on tab 704 extending from the proximal end). Removal of cover 700 exposes the adhesive on the inner surface defining central opening 314 for contact with outer surface 210 of shaft 104 of trocar 100.
  • the adhesive may be, for example, a biocompatible pressure sensitive adhesive that attaches trocar sleeve 302 to shaft 104 (e.g., when an adhesive such as a glue on the sleeve is pressed onto the trocar to facilitate adherence).
  • the adhesive may be a permanent adhesive, or a temporary adhesive such as a solvent dissolvable adhesive that allows removal and disposal of hemostatic port cuff 300.
  • FIG. 7 also illustrates another element that may be provided for facilitating attachment of trocar sleeve 302 to shaft 104, which can be used along with, or in place of the adhesive described above.
  • trocar sleeve 302 may ⁇ be provided with an elastic layer 707.
  • Elastic layer 707 may form the inner layer 306 of sleeve 302, may be an additional layer attached to the inner layer in central opening 314 (e.g., with the adhesive on the elastic layer), and may extend along the entire length of central opening 314 or may be disposed at the proximal or distal end of the sleeve.
  • Elastic layer 707 may- provide an elastic sheath that provides additional pressure between trocar sleeve 302 and outer surface 210 of shaft 104 to hold the sleeve onto the trocar surface via pressure and/or friction (e.g., in addition to or instead of adhesive).
  • a reference to an element in the singular is not intended to mean one and only one unless specifically so stated, but rather one or more.
  • "a" module may refer to one or more modules. An element proceeded by "a,” “an,” “the,” or “said” does not, without further constraints, preclude the existence of additional same elements.
  • Headings and subheadings, if any, are used for convenience only and do not limit the invention.
  • the word exemplary , or "e.g.,” is used to mean serving as an example or illustration. To the extent that the term include, have, or the like is used, such term is intended to be inclusive in a manner similar to the term comprise as comprise is interpreted when employed as a transitional word in a claim. Relational terms such as first and second and the like may be used to distinguish one entity or action from another without necessarily requiring or implying any- actual such relationship or order between such entities or actions.
  • phrases such as an aspect, the aspect, another aspect, some aspects, one or more aspects, an implementation, the implementation, another implementation, some implementations, one or more implementations, an embodiment, the embodiment, another embodiment, some embodiments, one or more embodiments, a configuration, the configuration, another configuration, some configurations, one or more configurations, the subject technology, the disclosure, the present disclosure, other variations thereof and alike are for convenience and do not imply that a disclosure relating to such phrase(s) is essential to the subject technology or that such disclosure applies to all configurations of the subject technology.
  • a disclosure relating to such phrase(s) may apply to all configurations, or one or more configurations.
  • a disclosure relating to such phrase(s) may provide one or more examples.
  • a phrase such as an aspect or some aspects may refer to one or more aspects and vice versa, and this applies similarly to other of the foregoing phrases.
  • a phrase "at least one of preceding a series of items, with the terms “and” or “or” to separate any of the items, modifies the list as a whole, rather than each member of the list.
  • the phrase "at least one of does not require selection of at least one item; rather, the phrase allows a meaning that includes at least one of any one of the items, and/or at least one of any combination of the items, and/or at least one of each of the items.
  • each of the phrases “at least one of A, B, and C” or “at least one of A, B, or C” refers to only A, only B, or only C; any combination of A, B, and C; and/or at least one of each of A, B, and C.
  • a term coupled or the like may refer to being directly coupled. In another aspect a term coupled or the like may refer to being indirectly coupled.
  • top, bottom, front, rear, side, horizontal, vertical, proximal, distal, and the like refer to an arbitrary frame of reference, rather than to the ordinary gravitational frame of reference. Thus, such a term may extend upwardly, downwardly, diagonally, or horizontally in a gravitational frame of reference.

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  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Pathology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

L'invention concerne un manchon d'orifice hémostatique pour un trocart qui empêche une fuite d'air, permet l'hémostase d'une incision, empêche une obstruction visuelle par drainage de fluide dans la cavité corporelle, et empêche le glissement du trocart. Le manchon d'orifice hémostatique comprend un manchon de trocart ayant une ouverture centrale configurée pour recevoir une tige du trocart. L'ouverture centrale est définie par une surface interne d'une couche interne du manchon de trocart. La couche interne est fixée à une couche externe pour définir une cavité interne qui peut être remplie pour gonfler le manchon de trocart pour exercer une pression au niveau de l'incision. Un tube de gonflage est couplé de manière fluidique à la cavité interne pour faciliter le gonflage du manchon.
PCT/US2018/055610 2017-10-13 2018-10-12 Manchon d'orifice hémostatique WO2019075326A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762572365P 2017-10-13 2017-10-13
US62/572,365 2017-10-13

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WO2019075326A1 true WO2019075326A1 (fr) 2019-04-18

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3683911A (en) * 1970-08-13 1972-08-15 Pelam Inc Protective seal for catheter
US5964781A (en) * 1995-05-19 1999-10-12 General Surgical Innovations, Inc. Skin seal with inflatable membrane
US20040111061A1 (en) * 2002-11-12 2004-06-10 Diana Curran Trocar having an inflatable cuff for maintaining an insufflated abdominal cavity during an open laparaoscopy procedure
US20120190933A1 (en) * 2011-01-24 2012-07-26 Tyco Healthcare Group Lp Inflatable access assembly
CA3003289A1 (fr) * 2015-10-29 2017-05-04 Convatec Technologies Inc. Systeme de soupape pour dispositifs gonflables

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3683911A (en) * 1970-08-13 1972-08-15 Pelam Inc Protective seal for catheter
US5964781A (en) * 1995-05-19 1999-10-12 General Surgical Innovations, Inc. Skin seal with inflatable membrane
US20040111061A1 (en) * 2002-11-12 2004-06-10 Diana Curran Trocar having an inflatable cuff for maintaining an insufflated abdominal cavity during an open laparaoscopy procedure
US20120190933A1 (en) * 2011-01-24 2012-07-26 Tyco Healthcare Group Lp Inflatable access assembly
CA3003289A1 (fr) * 2015-10-29 2017-05-04 Convatec Technologies Inc. Systeme de soupape pour dispositifs gonflables

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