Balloon trocar

• US 8,939,946 B2
• Filed: 04/03/2012
• Issued: 01/27/2015
• Est. Priority Date: 03/13/2006
• Status: Active Grant

• Current Assignee: Applied Medical Resources Corporation (Applied Medical Corporation)
• Original Assignee: Applied Medical Resources Corporation (Applied Medical Corporation)
• Inventors: Albrecht, Jeremy J., Au, Gigi, Nguyen, Eric, Gadberry, Donald L., Brustad, John R., Johnson, Gary M., Hart, Charles C.
• Primary Examiner(s): Vu, Quynh-Nhu H
• Assistant Examiner(s): Zhang, Jenna
• Application Number:
  US13/438,566
• Publication Number:
  US 20120190930A1
• Time in Patent Office: 1,029 Days
• Field of Search: 604/164.03, 604/164.04, 604/164.07, 60416409-16411, 60416501-16601
• US Class Current: 604/264
• CPC Class Codes: A61B 17/0218 for minimally invasive surgery A61B17/0281, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/3415 for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters A61B17/3417 takes precedence; body piercing catheter guide needles A61M25/06
• CPC Class Codes: A61B 17/3417 Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating syringe needles A61M5/32; dilators A61M29/00
• CPC Class Codes: A61B 17/3421 Cannulas
• CPC Class Codes: A61B 17/3423 Access ports, e.g. toroid shape introducers for instruments or hands access sites for liquids A61M39/0247
• CPC Class Codes: A61B 17/3498 Valves therefor, e.g. flapper valves, slide valves haemostasis valves A61M39/06; check valves A61M39/24
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/00557 inflatable A61B2017/22051 takes precedence
• CPC Class Codes: A61B 2017/22051 with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation A61B2017/22048, A61B2017/3486 take precedence
• CPC Class Codes: A61B 2017/3419 Sealing means between cannula and body
• CPC Class Codes: A61B 2017/3433 with different outer diameters of the cannula
• CPC Class Codes: A61B 2017/3445 used as instrument channel for multiple instruments catheters A61B2017/22072
• CPC Class Codes: A61B 2017/347 Locking means, e.g. for locking instrument in cannula
• CPC Class Codes: A61B 2017/3486 Balloon
• CPC Class Codes: A61B 2017/3488 Fixation to inner organ or inner body tissue
• CPC Class Codes: A61B 2017/349 Trocar with thread on outside
• CPC Class Codes: A61J 15/0053 Means for fixing the tube outside of the body, e.g. by a special shape, by fixing it to the skin holding devices, e.g. on the body A61M25/02, mouthpieces for tracheal tubes A61M16/0488; transcutaneous access sites A61M39/0247
• CPC Class Codes: A61M 2039/0261 Means for anchoring port to the body, or ports having a special shape or being made of a specific material to allow easy implantation/integration in the body
• CPC Class Codes: A61M 2039/0273 for introducing catheters into the body
• CPC Class Codes: A61M 2039/0279 for introducing medical instruments into the body, e.g. endoscope, surgical tools
• CPC Class Codes: A61M 2039/0294 : having a specific shape matching the shape of a tool to be inserted therein, e.g. for easy introduction, for sealing purposes, guide
• CPC Class Codes: A61M 2039/062 : used with a catheter
• CPC Class Codes: A61M 2039/0626 : used with other surgical instruments, e.g. endoscope, trocar
• CPC Class Codes: A61M 2039/0686 : comprising more than one seal
• CPC Class Codes: A61M 25/04 : in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence
• CPC Class Codes: A61M 39/0247 : Semi-permanent or permanent transcutaneous or percutaneous access sites to the inside of the body peritoneal dialysis catheters A61M1/285; tracheostomy devices A61M16/0465; measuring pressure within the body A61B5/03; colostomy devices A61F5/445; gastrotomy feeding tubes A61J15/0015; means for fixing a feeding tube outside of the body A61J15/0053
• CPC Class Codes: A61M 39/06 : Haemostasis valves, i.e. gaskets sealing around a needle, catheter or the like, closing on removal thereof

Abstract

A balloon trocar includes a cannula assembly including a cannula and an outer sleeve fitting over the cannula. The distal end of the outer sleeve is proximal to the distal end of the cannula. A balloon is coupled to a distal portion of the sleeve and a distal portion of the cannula. The outer surface of the cannula includes a plurality of longitudinal channels for transmitting gas or fluid to the balloon. A bolster having a gel pad at its distal portion is slidably mounted to the cannula assembly and may be locked in a desired position. In use, the trocar is inserted into an incision through a body wall and into a body cavity. The balloon is inflated and the cannula assembly pulled proximally against the incision while the bolster is slid distally to the body wall and locked in place to seal the incision with the compressed balloon.

Claims

1. A cannula assembly, comprising:

a cannula including a substantially longitudinal tube having a proximal end, a distal end, an outer surface, an inner surface defining a lumen extending between the proximal end and the distal end, an annular groove on the outer surface of the cannula adjacent the distal end of the cannula, and a fluid conduit formed in the outer surface of the cannula, the fluid conduit extending longitudinally along the length of the cannula distally to a point proximal to the annular groove near the distal end of the cannula;

a sleeve including a substantially longitudinal tube having a proximal end, a distal end, a lumen extending between the proximal end and the distal end, the lumen of the sleeve being configured to accept the cannula, the proximal end of the sleeve sealingly engaging the outer surface of the cannula adjacent the proximal end of the cannula, and the distal end of the sleeve positioned proximal the annular groove of the cannula; and

a balloon extending from the distal end of the sleeve distally to cover the annular groove on the outer surface of the cannula, the balloon fixed in place to the annular groove, and the balloon comprised of a material that has a non-inflated configuration in which the balloon is folded onto the cannula and the sleeve and an inflated configuration having a relatively large profile.

2. The cannula assembly of claim 1, wherein adhesive bonding couples the proximal end of the sleeve to the cannula.

3. The cannula assembly of claim 1, further comprising a seal positioned between the proximal end of the sleeve and the cannula to provide sealing engagement between the sleeve and the cannula.

4. The cannula assembly of claim 3, wherein the seal is an o-ring.

5. The cannula assembly of claim 1, wherein the fluid conduit comprises a plurality of channels on the outer surface of the cannula.

6. The cannula assembly of claim 5, wherein the plurality of channels on the outer surface of the cannula includes a plurality of substantially longitudinal grooves that are substantially parallel to a longitudinal axis of the cannula.

7. The cannula assembly of claim 1, wherein the balloon comprises a thermoplastic film material.

8. The cannula assembly of claim 1, wherein

the proximal end of the cannula includes a proximal portion having a first, larger circumference and the distal end of the cannula includes a distal portion having a second, smaller circumference;

and

the proximal end of the sleeve includes a proximal portion having a first, larger circumference and the distal end of the sleeve includes a distal portion having a second, smaller circumference.

9. The cannula assembly of claim 1, further comprising a snap fitting comprising at least one projection on the outer surface of the cannula and at least one notch on the inner surface of the sleeve for coupling the sleeve to the cannula.

10. The cannula assembly of claim 1, wherein the large profile of the inflated configuration of the balloon includes a substantially toroid shape.

11. A cannula assembly comprising:

a cannula having a proximal end, a distal end, an outer surface, an inner surface defining a lumen extending between the proximal end and the distal end, an annular groove on the outer surface of the cannula adjacent the distal end of the cannula, and a fluid conduit formed in the outer surface of the cannula, the fluid conduit extending longitudinally along the length of the cannula distally to a point proximal to the annular groove near the distal end of the cannula; and

a sleeve assembly comprising;

a sleeve portion having a proximal end, a distal end, and a lumen extending between the proximal end and the distal end, the lumen of the sleeve portion being configured to accept the cannula, the proximal end of the sleeve portion sealingly engaging the outer surface of the cannula adjacent the proximal end of the cannula, and the distal end of the sleeve portion positioned proximal the annular groove of the cannula; and

a balloon portion extending from the distal end of the sleeve distally to cover the annular groove on the outer surface of the cannula, the balloon portion fixed in place in the annular groove, and the balloon portion comprised of a non-distensible material.

12. The cannula assembly of claim 11, further comprising a seal positioned between the sleeve portion at the proximal end thereof and the cannula at the proximal end thereof.

13. The cannula assembly of claim 11, wherein the proximal end of the sleeve portion is adhesively bonded to the proximal end of the cannula.

14. The cannula assembly of claim 11, wherein the sleeve portion is formed of a polycarbonate material.

15. The cannula assembly of claim 11, wherein the sleeve portion comprises an annular groove formed therein near the distal end of the sleeve portion, and wherein a first end of the balloon portion is coupled to the annular groove of the sleeve portion and a second end of the balloon portion is fixed in place in the annular groove of the cannula.

16. The cannula assembly of claim 15, further comprising a first winding thread coupling the first end of the balloon portion to the annular groove of the sleeve portion and a second winding thread fixing the second end of the balloon portion in place in the annular groove of the cannula.

17. The cannula assembly of claim 11, wherein the balloon is substantially flush to the cannula and substantially flush to the sleeve.

18. A cannula assembly comprising:

a cannula having a proximal end, a distal end, an outer surface, an inner surface defining a lumen extending between the proximal end and the distal end, an annular groove on the outer surface of the cannula adjacent the distal end of the cannula, and a fluid conduit formed in the outer surface of the cannula, the fluid conduit extending longitudinally along the length of the cannula distally to a point proximal to the annular groove near the distal end of the cannula;

a sleeve assembly positioned around the outer surface of the cannula and extending along the cannula from adjacent the proximal end of the cannula to adjacent the distal end of the cannula, the sleeve assembly comprising;

a sleeve portion having a proximal end and a distal end, the proximal end of the sleeve sealingly engaging the outer surface of the cannula adjacent the proximal end of the cannula, and the distal end of the sleeve positioned proximal the annular groove of the cannula; and

a balloon portion extending from the distal end of the sleeve portion distally to cover the annular groove on the outer surface of the cannula, the balloon fixed in place in the annular groove; and

a bolster positioned around the sleeve portion and slidably adjustable along the sleeve portion proximal the balloon portion.

19. The cannula assembly of claim 18, wherein the balloon portion is comprised of a non-elastomeric material.

20. The cannula assembly of claim 19, wherein the balloon portion has an uninflated configuration such that the balloon portion is folded onto the sleeve portion and the cannula and an inflated configuration such that the balloon portion defines a toroidal profile.

21. The cannula assembly of claim 19, wherein the proximal end of the sleeve portion is bonded to the cannula.