Surgical access device and manufacture thereof

• US 20050192608A1
• Filed: 10/15/2004
• Published: 09/01/2005
• Est. Priority Date: 10/17/2003
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: Moreno, Miguel, Gresham, Richard D., Wenchell, Thomas
• Granted Patent: US 7,892,170 B2
• Time in Patent Office: Days
• US Class Current: 606/167
• 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 17/3431 being collapsible, e.g. made of thin flexible material A61B17/3423 takes precedence
• CPC Class Codes: A61B 17/3439 with means for changing the inner diameter of the cannula, e.g. expandable A61B17/3423, A61B17/3431 take precedence; catheters A61M25/0662
• CPC Class Codes: A61B 17/3462 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 expandable cannulas A61B17/3417
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/347 Locking means, e.g. for locking instrument in cannula
• CPC Class Codes: A61B 2017/349 Trocar with thread on outside
• CPC Class Codes: A61B 50/30 Containers specially adapted for packaging, protecting, dispensing, collecting or disposing of surgical or diagnostic appliances or instruments for wound clamps A61B17/10; for ligaturing clips A61B17/122; packages or dispensers for surgical gloves or finger-stalls A61B42/40

Abstract

A surgical access system includes a tubular member defining a longitudinal axis and having an axial lumen. The tubular member includes a braided material adapted to expand from a first initial condition having a first cross-sectional dimension to a second expanded condition having a second-cross sectional dimension greater than the first cross-sectional dimension. The tubular member defines an oblique end surface. An access housing is mounted to the tubular member. The access housing is dimensioned for engagement by the user. A process for manufacturing a surgical access device is also disclosed.

Claims

1. A surgical access system, which comprises:

a tubular member defining a longitudinal axis and having an axial lumen, the tubular member comprising a braided material adapted to expand from a first initial condition having a first cross-sectional dimension to a second expanded condition having a second-cross sectional dimension greater than the first cross-sectional dimension, the tubular member having a proximal end and a distal end, the distal end defining an oblique end surface; and

a housing mounted to the proximal end of the tubular member.

2. The surgical access system according to claim 1 wherein the tubular member includes a mounting element mounted within an internal area of the tubular member, the mounting element facilitating attachment of the tubular member to the access housing.

3. The surgical access system according to claim 2 wherein the mounting element is dimensioned to frictionally engage an internal wall portion of the tubular member.

4. The surgical access system according to claim 3 wherein the access housing includes a base and a cover mountable to the base, the base receiving a proximal end of the tubular member.

5. The surgical access system according to claim 4 wherein the mounting element is received between the base and the cover, for securing the tubular member to the housing.

6. The surgical access system according to claim 5 wherein the mounting element is engageable with a locking shelf of the base.

7. The surgical access system according to claim 4 wherein the access housing includes a seal element mounted within the base, the seal element defining an aperture for sealed reception of an elongate object.

8. The surgical access system according to claim 1 including a dilator member, the dilator member adapted for insertion within the tubular member to expand the tubular member between the first and second conditions.

9. The surgical access system according to claim 8 wherein the dilator member is a cannula.

10. The surgical access system according to claim 9 wherein the cannula includes an external threaded portion, the external threaded portion engageable with corresponding internal structure of the housing whereby rotation of the cannula causes advancement thereof in a distal direction due to cooperative engagement of the external threading portion and the internal structure.

11. A process for manufacturing a surgical access device, comprising the steps of:

providing a tubular member defining a longitudinal axis and having an axial lumen, the tubular member adapted to expand from a first initial condition having a first cross-sectional dimension to a second expanded condition having a second-cross sectional dimension greater than the first cross-sectional dimension;

creating a flared end portion of the tubular member;

mounting a mounting element to the flared end portion of the tubular member; and

securing the mounting element to a housing;

12. The process according to claim 11, wherein the housing comprises a hub and a base, and the step of securing the mounting element includes positioning the mounting element between the hub and base.

13. The process according to claim 12 wherein the step of providing a tubular member includes positioning an elastomer layer over a tubular braid.

14. The process according to claim 12 wherein the step of mounting the mounting element includes the step of positioning the mounting element onto a mandrel and advancing the tubular member onto the mandrel whereby the flared end portion engages the mounting element.

15. The process according to claim 12 wherein the step of securing the mounting element includes attaching a cover between the hub and base.

16. The process according to claim 12 including the step of mounting a seal element adjacent the hub, the seal element having an aperture for receiving a surgical object and forming a substantial sealed relation therewith.

17. The process according to claim 16 further including the step of securing a cover to one of the base and the hub, to secure the seal element in the housing.

18. The process according to claim 17 wherein the step of securing the cover includes mounting the cover to the base.

19. The process according claim 11 including the step of positioning a flexible sheathing about the tubular member.

20. The process according to claim 19 including the step of securing the flexible sheathing to the tubular member.

21. The process according to claim 11 further comprising the step of providing an elastomer layer with a flared end portion.

22. The process according to claim 21 wherein the step of providing includes an extrusion process.

23. The process according to claim 11 further comprising the step of forming an oblique end surface relative to the longitudinal axis on the tubular member.

24. A surgical access system, which comprises:

a tubular member defining a longitudinal axis and having an axial lumen, the tubular member comprising a braided material adapted to expand from a first initial condition having a first cross-sectional dimension to a second expanded condition having a second-cross sectional dimension greater than the first cross-sectional dimension, the tubular member having a proximal end and a distal end;

a housing mounted to the proximal end of the tubular member; and

a cannula positionable within the tubular member, the cannula including an external threaded portion, the external threaded portion engageable with corresponding internal structure of the housing whereby rotation of the cannula causes advancement thereof in a distal direction due to cooperative engagement of the external threading portion and the internal structure, the cannula dimensioned to radially expand the tubular member to assume the second expanded condition.

25. The surgical access system according to claim 24 wherein the internal structure of the housing includes an internal flange.