SURGICAL RASPING SYSTEMS AND MEHTODS

• US 20110071527A1
• Filed: 04/22/2010
• Published: 03/24/2011
• Est. Priority Date: 09/24/2009
• Status: Active Grant

• Current Assignee: Keith J. Nelson, Medicinelodge, Inc (Nelso Antolotti)
• Original Assignee: Medicinelodge, Inc (Nelso Antolotti)
• Inventors: Nelson, Keith, Hansen, Nathan D., Sinnott, M. Mary
• Granted Patent: US 8,617,164 B2
• Time in Patent Office: Days
• US Class Current: 606/85
• CPC Class Codes: A61B 17/162 Chucks or tool parts which are to be held in a chuck
• CPC Class Codes: A61B 17/1624 Drive mechanisms therefor
• CPC Class Codes: A61B 17/1628 Motors; Power supplies
• CPC Class Codes: A61B 17/1659 Surgical rasps, files, planes, or scrapers
• CPC Class Codes: A61B 17/32002 with continuously rotating, oscillating or reciprocating cutting instruments
• CPC Class Codes: A61B 2017/320028 with reciprocating movements

Abstract

A surgical rasping system functional in multiple orthopedic applications, including but not limited to shoulder, knee, hip, wrist, ankle, spinal, or other joint procedures. The system comprises a rasping head which may be low profile and offer a flat cutting/rasping surface, and is configured to be driven by an attached hub that translates a rotational movement into a reciprocating motion. Suction for removal of bone fragments or other tissues is provided through an opening spaced apart from or adjacent to the rasping surface.

Claims

1. A tissue removal device for being driven by a powered rotary handpiece, comprising:

a rotary hub having a distal end and a proximal end;

a tissue removal member having a distal end comprising a tissue removal surface and a proximal end, the tissue removal member proximal end coupled in sliding contact with the rotary hub; and

a motion conversion mechanism;

wherein when the rotary hub is rotated about an axis, the motion conversion mechanism urges motion of the tissue removal member along the axis, wherein the motion consists of reciprocating translation between a first retracted position and a second extended position.

2. The tissue removal device of claim 1, further comprising:

a housing disposed around a portion of the tissue removal member and a portion of the rotary hub, the housing having a proximal end, a distal end and a proximally facing cam surface;

wherein the rotary hub distal end terminates in a distal end face, the distal end face comprising a cam follower surface, wherein the motion conversion mechanism comprises the housing cam surface and the cam follower surface.

3. The tissue removal device of claim 2, wherein the housing cam surface is distal to the proximal end of the tissue removal member.

4. The tissue removal device of claim 2, wherein the cam surface comprises an annular surface having at least two identically shaped protrusions, wherein the cam follower surface has a shape complementary to the cam surface.

5. The tissue removal device of claim 1, wherein the tissue removal surface comprises a plurality of teeth, each tooth having a cutting edge, wherein the cutting edges are unidirectionally oriented.

6. The tissue removal device of claim 1, wherein the tissue removal member proximal end is distal to the rotary hub distal end.

7. The tissue removal device of claim 1, further comprising:

a spring, wherein the spring biases the tissue removal member distally toward the extended position, and wherein the rotary hub urges the tissue removal member proximally toward the retracted position.

8. The tissue removal device of claim 1, wherein the tissue removal member is coaxial with the rotary hub.

9. The tissue removal device of claim 1, further comprising:

a keyway, wherein the tissue removal member cooperates with the keyway to prohibit rotary motion of the tissue removal member.

10. A tissue removal device for being driven by a powered handpiece, comprising:

a tissue removal member having a distal end, a proximal end, and a shaft extending therebetween along a longitudinal axis;

a housing comprising a bore extending longitudinally therethrough;

a sleeve member having a distal end and a proximal end, the sleeve member fixed to the housing in coaxial alignment with the bore, the tissue removal member extending through the bore and the sleeve member;

a motion mechanism;

wherein when the motion mechanism is connected to the powered handpiece, the motion mechanism urges motion of the tissue removal member along the axis, wherein the motion consists of reciprocating translation between a first retracted position and a second extended position along a solitary axis.

11. The tissue removal device of claim 10, wherein the motion mechanism comprises a drive shaft, the drive shaft coupled directly to the tissue removal member.

12. The tissue removal device of claim 10, wherein the sleeve member is rigid.

13. The tissue removal device of claim 10, wherein the tissue removal member distal end comprises a tissue removal surface having a length extending along the longitudinal axis, and a width transverse to the length, wherein the tissue removal surface is convex across its width.

14. The tissue removal device of claim 13, further comprising:

a plurality of teeth formed on the tissue removal surface, each tooth having a cutting edge, wherein the cutting edges are unidirectionally oriented.

15. The tissue removal device of claim 13, wherein the tissue removal surface is disposed distal to the distal end of the sleeve member when the tissue removal member is in the first retracted position and when the tissue removal member is in the second extended position.

16. The tissue removal device of claim 10, wherein the motion mechanism comprises a rotary hub having a distal end and a proximal end;

wherein when the rotary hub is rotated about the axis, the motion mechanism urges the motion of the tissue removal member along the axis, wherein the motion consists of the reciprocating translation between the first retracted position and the second extended position.

17. A tissue removal device for being driven by a powered handpiece, comprising:

a tissue removal member having a distal end, a proximal end, and a shaft extending therebetween along a longitudinal axis, the tissue removal member having a tissue removal surface adjacent the distal end,

a suction pathway extending from a distal opening to a proximal opening, the distal opening spaced apart from the tissue removal surface;

a housing comprising a bore extending longitudinally therethrough, a portion of the shaft extending through the housing, a portion of the suction pathway extending through the housing;

a motion mechanism;

wherein when the motion mechanism is connected to the powered handpiece, the motion mechanism urges motion of the tissue removal member along the axis wherein the motion consists of reciprocating translation between a first retracted position and a second extended position.

18. The tissue removal device of claim 17, wherein the suction pathway is coaxial with the shaft.

19. The tissue removal device of claim 17, wherein the shaft comprises a lumen extending between a distal end and a proximal end of the shaft, the shaft lumen defining a portion of the suction pathway.

20. The tissue removal device of claim 17, further comprising:

a sleeve member having a distal end and a proximal end, the sleeve member fixed to the housing in coaxial alignment with the bore, the tissue removal member extending through the bore and the sleeve member.

21. The tissue removal device of claim 17, wherein the suction pathway distal opening is proximal to the tissue removal surface.

22. The tissue removal device of claim 17, further comprising:

a plurality of teeth formed on the tissue removal surface, each tooth having a cutting edge, wherein the cutting edges are oriented toward the suction pathway distal opening.

23. The tissue removal device of claim 22, wherein the teeth are oriented to cut when the tissue removal mechanism translates toward the first retracted position.

24. The tissue removal device of claim 17, wherein the motion mechanism comprises a drive shaft, the drive shaft coupled directly to the tissue removal member.