Trocar obturator with cutting edges

• US 20070066988A1
• Filed: 09/22/2005
• Published: 03/22/2007
• Est. Priority Date: 09/22/2005
• Status: Abandoned Application

• Current Assignee: Ethicon Endo-Surgery, Inc. (Johnson & Johnson)
• Original Assignee: Ethicon Endo-Surgery, Inc. (Johnson & Johnson)
• Inventors: Datta, Keshava, Cronin, Michael, Gilker, Thomas
• Application Number:
  US11/232,226
• Publication Number:
  US 20070066988A1
• Time in Patent Office: Days
• US Class Current: 606/185
• 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 2017/3454 Details of tips

Abstract

A trocar obturator includes a shaft having a proximal end and a distal end. The trocar obturator also includes a tip positioned at the distal end of the shaft, the tip including a distally extending blade structure adapted to reduce penetration forces required during insertion of the trocar obturator. The blade structure includes a first cutting edge and a second cutting edge.

Claims

1. A trocar obturator, comprising:

a shaft having a proximal end and a distal end;

a tip positioned at the distal end of the shaft, the tip including a distally extending blade structure adapted to reduce penetration forces required during insertion of the trocar obturator;

the blade structure includes a first cutting edge and a second cutting edge.

2. The trocar obturator according to claim 1, wherein the first and second cutting edges are offset.

3. The trocar obturator according to claim 1, wherein a secondary flat point angle is positioned between the first and second cutting edges.

4. The trocar obturator according to claim 1, wherein the first and second cutting edges respectively include a negative cutting angle

5. The trocar obturator according to claim 4, wherein the first and second cutting edges range from −

60° and

0°

.

6. The trocar obturator according to claim 5, wherein the first and second cutting edges range from −

45° and

−

30°

.

7. The trocar obturator according to claim 1, wherein the first and second cutting edges respectively include a positive cutting angle.

8. The trocar obturator according to claim 7, wherein the first and second cutting edges range from 0°

to 70°

.

9. The trocar obturator according to claim 8, wherein the first and second cutting edges range from 0°

to 60°

.

10. The trocar obturator according to claim 1, wherein the tip has a generally conical construction.

11. The trocar obturator according to claim 1, wherein the tip has a cone angle of approximately 30°

to approximately 150°

.

12. A trocar assembly, comprising:

a trocar sleeve and a trocar obturator shaped and dimensioned for movement within the trocar sleeve;

the trocar obturator includes a shaft having a proximal end and a distal end, a tip positioned at the distal end of the shaft, the tip including a distally extending blade structure adapted to reduce penetration forces required during insertion of the trocar obturator, and the blade structure includes a first cutting edge and a second cutting edge.

13. The trocar assembly according to claim 12, wherein the first and second cutting edges are offset.

14. The trocar assembly according to claim 12, wherein a secondary flat point angle is positioned between the first and second cutting edges.

15. The trocar assembly according to claim 12, wherein the first and second cutting edges respectively include a negative cutting angle

16. The trocar assembly according to claim 15, wherein the first and second cutting edges range from −

60′ and

0°

.

17. The trocar assembly according to claim 12, wherein the first and second cutting edges respectively include a positive cutting angle.

18. The trocar assembly according to claim 17, wherein the first and second cutting edges range from 0°

to 70°

.

19. The trocar assembly according to claim 12, wherein the tip has a generally conical construction.

20. The trocar assembly according to claim 12, wherein the tip has a cone angle of approximately 30°

to approximately 150°

.