Reciprocating rotary arthroscopic surgical instrument

• US 20030083684A1
• Filed: 10/26/2001
• Published: 05/01/2003
• Est. Priority Date: 10/26/2001
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Jezierski, Rafal, Cesarini, Peter M., Drucker, Karen, Cassidy, Roger R. Jr.
• Granted Patent: US 7,226,459 B2
• Time in Patent Office: Days
• US Class Current: 606/170
• CPC Class Codes: A61B 17/320016 Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes A61B10/0233, A61B17/29, A61B17/3207 take precedence
• CPC Class Codes: A61B 17/32002 with continuously rotating, oscillating or reciprocating cutting instruments
• CPC Class Codes: A61B 17/320758 with a rotating cutting instrument, e.g. motor driven A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002
• CPC Class Codes: A61B 18/148 having a short, rigid shaft for accessing the inner body transcutaneously, e.g. for neurosurgery or arthroscopy
• CPC Class Codes: A61B 2017/2913 cams or guiding means
• CPC Class Codes: A61B 2017/320028 with reciprocating movements
• CPC Class Codes: A61B 2017/320032 Details of the rotating or oscillating shaft, e.g. using a flexible shaft
• CPC Class Codes: A61B 2217/005 with suction drainage system

Abstract

A surgical instrument includes a cutting member with an implement for cutting tissue, and a drive coupled to the cutting member to simultaneously rotate and translate the cutting member in response to a force applied to the drive. A method of cutting tissue includes positioning an outer member such that tissue is located within the outer member, engaging the tissue with an inner member, and simultaneously rotating and translating the inner member to cut the tissue. A tangential cutting force is applied to the tissue with the inner member to mechanically cut the tissue. The inner member is mechanically driven to undergo simultaneous rotation and translation.

Claims

1. A surgical instrument, comprising:

a cutting member including an implement for cutting tissue; and

a drive coupled to the cutting member to simultaneously rotate and translate the cutting member in response to a force applied to the drive.

2. The instrument of claim 1, wherein the drive is configured such that the translation of the cutting member comprises reciprocation.

3. The instrument of claim 1, wherein the drive includes a drive member attached to the cutting member, the drive member including a helical groove.

4. The instrument of claim 3, wherein the drive includes a translation piece disposed in the groove such that rotary driving of the drive member results in simultaneous reciprocation of the drive member relative to the translation piece.

5. The instrument of claim 3, wherein the drive further comprises an inner drive hub coupled to the drive member, the inner drive hub defining a slot and the drive member includes a key received in the slot rotary coupling the drive member to the inner drive hub such that the drive member rotates with the inner drive hub while being free to translate relative to the inner drive hub.

6. The instrument of claim 3, wherein the helical groove comprises a left-hand threaded helical channel.

7. The instrument of claim 3, wherein the helical groove comprises a right-hand threaded helical channel.

8. The instrument of claim 3, wherein the helical groove comprises two helical channels, a first helical channel being a left-hand threaded helical channel and a second helical channel being a right-hand threaded helical channel.

9. The instrument of claim 3, wherein the cutting member is attached to the drive member to move rotatably and axially with the member.

10. The instrument of claim 1, wherein the implement comprises a chamfered cutting edge at a distal end of the cutting member.

11. The instrument of claim 10, wherein the chamfered edge of the inner member comprises a straight cutting edge.

12. The instrument of claim 10, wherein the chamfered edge comprises an angled cutting edge.

13. The instrument of claim 1 further comprising an outer tubular member, the cutting member being received within the outer member.

14. The instrument of claim 13, wherein the outer member includes a cutting window disposed proximate to a tip of the outer member.

15. The instrument of claim 14, wherein the cutting window comprises an opening in the outer member exposing the cutting member to tissue.

16. The instrument of claim 15, wherein the cutting window comprises a U-shaped proximal end and a saddle-shaped distal end.

17. The instrument of claim 15, wherein the saddle-shaped distal end of the cutting window includes a hook.

18. The instrument of claim 3, wherein the translation piece includes a follower received within the groove and a sealing cap over the follower, the follower being free to swivel relative to the sealing cap.

19. The instrument of claim 18, wherein the follower has an arched bridge shape.

20. The instrument of claim 3, wherein the translation piece is coupled to the drive member such that the translation piece is disposed in the helical groove and swivels to follow the helical groove as the drive member rotates.

21. A method of cutting tissue, comprising:

positioning an outer member such that tissue is located within the outer member;

engaging the tissue with an inner member received within the outer member; and

simultaneously rotating and translating the inner member to cut the tissue.

22. The method of claim 21, wherein the translating comprises reciprocating.

23. The method of claim 21, wherein the positioning the outer member comprises orienting the outer member tangentially to the tissue.

24. A method of cutting tissue, comprising:

providing a surgical instrument having an outer member and an inner member received within the outer member for movement relative to the outer member, and applying a tangential cutting force to the tissue with the inner member to mechanically cut the tissue.

25. A method of cutting tissue, comprising

applying a tangential cutting force to tissue with a member, and

mechanically driving the member to undergo simultaneous rotation and translation.

26. The method of claim 25, wherein the translation comprises reciprocation.