Trocar cannula assembly with low profile insertion configuration and method of manufacture

• US 10,420,584 B2
• Filed: 11/10/2016
• Issued: 09/24/2019
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Applied Medical Resources Corporation (Applied Medical Corporation)
• Original Assignee: Applied Medical Resources Corporation (Applied Medical Corporation)
• Inventors: Pravong, Boun, Pravongviengkham, Kennii, Bolanos, Eduardo, Velasco, Joel B.
• Primary Examiner(s): Nguyen, Vi X
• Application Number:
  US15/348,618
• Publication Number:
  US 20170056066A1
• Time in Patent Office: 1,048 Days
• CPC Class Codes: A61B 17/34 Trocars; Puncturing needles pointed biopsy instruments A61B10/0233; devices for piercing the ear-lobes A44C7/001; seals or hemostasis valves A61M39/06
• 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 17/3423 Access ports, e.g. toroid shape introducers for instruments or hands access sites for liquids A61M39/0247
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/3425 for internal organs, e.g. heart ports
• CPC Class Codes: A61B 2017/3454 Details of tips
• CPC Class Codes: A61B 2017/3486 Balloon
• CPC Class Codes: A61B 2017/3492 against the outside of the body
• CPC Class Codes: A61B 2090/038 during shipment
• CPC Class Codes: A61M 2039/0255 for access to the gastric or digestive system
• 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 2039/0279 for introducing medical instruments into the body, e.g. endoscope, surgical tools
• CPC Class Codes: A61M 25/10184 Means for controlling or monitoring inflation or deflation
• CPC Class Codes: A61M 39/02 Access sites
• 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

Abstract

A cannula assembly having a retention member and a method of manufacture of the cannula assembly is provided. The cannula assembly includes a cannula and a sleeve disposed around the cannula from a proximal end to a distal end. The sleeve can include a balloon formed by a stretch blow molding process following local heating once advanced over the cannula. Once formed, the balloon can be conditioned to constrict against the cannula. A conditioning aid can be advanced over the balloon when it is still formable to constrict the balloon against the cannula.

Claims

1. A cannula assembly comprising:

a cannula having a proximal end, a distal end opposite the proximal end, and a lumen extending from the proximal end to the distal end along a longitudinal axis, the lumen configured to receive a surgical instrument therein, the cannula comprising;

a generally tubular cannula body having an exterior surface and a first outer diameter; and

an annular recess formed in the exterior surface of the cannula body adjacent the distal end of the cannula, the annular recess transverse to the longitudinal axis, the annular recess having a second outer diameter smaller than the first outer diameter of the cannula body, and the annular recess having a textured surface adapted to receive an adhesive; and

a sleeve having a proximal end and a distal end, the sleeve disposed around the cannula from adjacent the proximal end of the cannula to the annular recess, the sleeve comprising;

an elongate tubular body; and

a balloon positioned distal the elongate tubular body.

2. The cannula assembly of claim 1, further comprising a conditioning aid removably disposed around the balloon, the conditioning aid sized to compress the balloon proximally along the exterior surface of the generally tubular cannula body in a snug fit defining a low diameter insertion profile.

3. The cannula assembly of claim 2, wherein the conditioning aid comprises a hollow tubular member.

4. The cannula assembly of claim 3, wherein the conditioning aid comprises a smooth inner surface.

5. The cannula assembly of claim 2, wherein the conditioning aid is configured to prevent proximal movement along the cannula past the balloon.

6. The cannula assembly of claim 5, wherein the conditioning aid has a distal end with a first diameter and proximal end with a second diameter, the first diameter smaller than the second diameter.

7. The cannula assembly of claim 2, wherein the balloon is folded beneath the conditioning aid in a two-step folding process comprising a first distal fold and a second proximal fold.

8. The cannula assembly of claim 1, wherein the textured surface of the annular recess comprises an annular interface surface having a texture defined by a plurality of pits.

9. The cannula assembly of claim 1, wherein the textured surface of the annular recess comprises an annular interface surface having a texture defined by a plurality of grooves.

10. The cannula assembly of claim 1, wherein the sleeve further comprises a bonding segment distal the balloon, the bonding segment positioned within the annular recess.

11. The cannula assembly of claim 10, wherein the bonding segment is coupled to the annular recess by the adhesive.

12. The cannula assembly of claim 1, wherein the adhesive comprises a combination of cyanoacrylate adhesive and UV cure adhesive.

13. The cannula assembly of claim 1, wherein the adhesive is substantially within the annular recess.