Carpal tunnel release apparatus and method

• US 6,019,774 A
• Filed: 12/10/1998
• Issued: 02/01/2000
• Est. Priority Date: 12/10/1998
• Status: Expired due to Term

• Current Assignee: Integra Lifesciences Corporation (Integra LifeSciences Holdings Corporation)
• Original Assignee: Kinetikos Medical, Inc. (Integra LifeSciences Holdings Corporation)
• Inventors: Weiss, Arnold Peter, Akelman, Edward, Collins, Michael S.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): HO, TAN-UYEN THI
• Application Number:
  US09/208,706
• Time in Patent Office: 418 Days
• Field of Search: 606/167, 606/168, 606/169, 606/170, 606/171, 30/294
• US Class Current: 606/167
• CPC Class Codes: A61B 17/320036 adapted for use within the carpal tunnel

Abstract

A carpal tunnel release apparatus and method including a surgical knife including an elongated handle having a forward portion and a rearward portion with the forward portion of the handle terminating in a cutting head. The cutting head has top edge and a bottom edge with the cutting head terminating in a substantially linear cutting edge extending from proximate the bottom edge of the cutting head toward the top edge of the cutting head. The cutting edge intersects and forms an angle with an upper guide finger which is the only structure which projects forwardly past the plane of the cutting edge and which at least partially forms the top edge of the cutting head. The guide apparatus includes an elongated bar defining one or more elongated grooves therein. A bottom portion of the forward portion of the knife is at least partially receivable within the groove of the guide member such that lateral movement of the forward portion is substantially restricted and such that the forward portion of the handle is slidably movable forward or backward while guided within the groove.

Claims

1. A surgical knife apparatus for performing carpal tunnel release surgery, said knife apparatus comprising:

(a) an elongated handle having a forward portion and a rearward portion with said forward portion of said handle terminating in a cutting head; and

(b) said cutting head having a top edge and a bottom edge, and said cutting head terminating in a substantially linear cutting edge extending from proximate said bottom edge of said cutting head toward said top edge of said cutting head, and said cutting edge intersecting and forming an angle with an upper guide finger which projects forwardly past said cutting edge and which at least partially forms said top edge of said cutting head.

2. The knife apparatus of claim 1 wherein said cutting edge and said guide finger form an angle of less then approximately ninety (90) degrees.

3. The knife apparatus of claim 1 wherein said guide finger and a terminal end of said bottom edge of said cutting head extends substantially identical distances distally.

4. The knife apparatus of claim 1 wherein a terminal end of said guide finger is rounded.

5. The knife apparatus of claim 1 wherein said rearward portion of said handle forms an angle of less than approximately one hundred eighty (180) degrees with said forward portion of said handle.

6. The knife apparatus of claim 5 wherein said rearward portion of said handle includes a grip.

7. A surgical knife and guide apparatus for performing carpal tunnel release surgery, said knife and guide apparatus comprising:

(a) an elongated handle having a forward portion and a rearward portion with said forward portion terminating in a cutting head;

(b) said cutting head of said handle having a top edge and a bottom edge, and said cutting head terminating in a substantially linear cutting edge extending from proximate said bottom edge of said cutting head toward said top edge of said cutting head, and said cutting edge intersecting and forming an angle with an upper guide finger which projects forwardly past said cutting edge and which at least partially forms said top edge of said cutting head; and

(c) an elongated guide member defining an elongated groove therein, with said forward portion of said handle being at least partially receivable within said groove of said guide member such that lateral movement of at least a portion of said forward portion is substantially restricted and such that said forward portion of said handle is slidably movable forward or backward within said groove.

8. The knife and guide apparatus of claim 7 wherein said cutting edge and said guide finger form an angle of less then approximately ninety (90) degrees.

9. The knife apparatus of claim 7 wherein said guide finger extends forwardly a distance substantially identical to a distance that said cutting edge extends forwardly.

10. The knife apparatus of claim 7 wherein a terminal end of said guide finger is rounded.

11. The knife apparatus of claim 7 wherein said rearward portion of said handle includes a gripping portion which forms an angle of less than approximately one hundred eighty (180) degrees with said forward portion of said handle portion.

12. A method of cutting a transverse carpal ligament, said method comprising the steps of:

(a) providing a surgical knife and guide apparatus comprising;

(i) an elongated handle having a forward portion and a rearward portion with said forward portion terminating in a cutting head;

(ii) said cutting head of said handle having a top edge and a bottom edge, and said cutting head terminating in a substantially linear cutting edge extending from proximate said bottom edge of said cutting head toward said top edge of said cutting head, and said cutting edge intersecting and forming an angle with an upper guide finger which projects forwardly past said cutting edge and which at least partially forms said top edge of said cutting head; and

(iii) an elongated guide member defining an elongated groove therein, with said forward portion of said handle being at least partially receivable within said groove of said guide member such that lateral movement of said forward portion is substantially restricted and such that said forward portion of said handle is slidably movable forward or backward within said groove;

(b) positioning said guide member adjacent a transverse carpal ligament with said groove of said guide member substantially facing said ligament;

(c) positioning said forward portion of said handle of said knife at least partially within said groove of said guide member; and

(d) cutting said ligament by advancing said handle of said knife forward to cut said ligament with said cutting edge while said forward portion of said handle remains at least partially received within said groove of said guide member.

13. The method of claim 12 wherein said guide finger advances above said ligament during the cutting step of paragraph (d).