OBTURATOR TIPS

• US 20080300617A1
• Filed: 05/29/2008
• Published: 12/04/2008
• Est. Priority Date: 06/01/2007
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: Smith, Robert C.
• Granted Patent: US 9,028,521 B2
• Time in Patent Office: Days
• US Class Current: 606/191
• 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 2017/3456 blunt
• CPC Class Codes: A61B 2017/346 with wings

Abstract

The present disclosure is directed towards a surgical dilating instrument for use in conjunction with a surgical portal device. The surgical dilating instrument disclosed herein includes an inventive dilating tip with a substantially polygonal cross-section that incorporates one or more raised atraumatic edge members.

Claims

1. A surgical instrument for use with a surgical portal apparatus comprising:

an elongate shaft having proximal and distal ends and defining a longitudinal axis; and

a dilating member disposed at the distal end of the elongate shaft, the dilating member having an outer surface that includes at least one atraumatic edge member, the at least one atraumatic edge member extending outwardly from the outer surface and proximally from a tip of the dilating member, wherein the dilating member has a substantially polygonal cross-section.

2. The surgical instrument of claim 1, wherein the substantially polygonal cross-section is substantially triangular.

3. The surgical instrument of claim 1, wherein the substantially polygonal cross-section includes at least two sides that are in substantially parallel relation.

4. The surgical instrument of claim 3, wherein the at least two sides include a first set of sides and at least one additional set of sides.

5. The surgical instrument of claim 4, wherein the first set of sides and the at least one additional set of sides define a plurality of vertices.

6. The surgical instrument of claim 5, wherein the plurality of vertices includes at least one vertex that is less than 90°

.

7. The surgical instrument of claim 5, wherein the plurality of vertices includes at least one vertex that is equal to 90°

.

8. The surgical instrument of claim 4, wherein the at least one additional set of sides comprises a second set of sides.

9. The surgical instrument of claim 5, wherein the plurality of vertices are substantially angular in configuration.

10. The surgical instrument of claim 5, wherein the plurality of vertices are substantially rounded in configuration.

11. The surgical instrument of claim 1, wherein the elongate shaft defines a centerpoint.

12. The surgical instrument of claim 11, wherein the tip of the dilating member is substantially aligned with the centerpoint.

13. The surgical instrument of claim 11, wherein the tip of the dilating member is substantially offset with respect to the centerpoint.

14. The surgical instrument of claim 1, wherein the at least one edge member extends at least partially along the elongate shaft.

15. The surgical instrument of claim 1, wherein the dilating member has a substantially tapered profile.

16. The surgical instrument of claim 1, wherein the tip of the dilating member is substantially blunt.