Tendon harvesting system

Patent metadata

Field	Value
Publication number	US-12167861-B2
Application number	US-201917282953-A
Country	US
Kind code	B2
Filing date	Oct 3, 2019
Priority date	Oct 5, 2018
Publication date	Dec 17, 2024
Grant date	Dec 17, 2024

Abstract

A system for improving graft harvesting including a tendon harvesting instrument for producing a graft from a tendon. The instrument includes a handle, a shaft and a blade portion operatively coupled to the shaft. The blade portion defines a cutting edge that at least partially corresponds to the shape of a graft cross section of the graft. The blade portion is inserted into the tendon by axially rotating the instrument shaft. The blade portion may include a free end for piercing the tendon as the blade portion is rotated into the tendon. The harvesting instrument may also include amputating means for removing the end connection of the graft to the tendon, the amputating means including a means of changing an orientation of an end portion of the cutting edge.

First claim

The invention claimed is:

1. A tendon harvesting system for forming a tendon graft from a native tendon comprising:
a guide and a harvesting instrument, the guide defining an elongate body with a first end and a tapered second end, the tapered second end configured to extend subcutaneously and along a longitudinal axis of the native tendon, the guide also including;

an opening configured to receive the harvesting instrument therethrough and guide access to the native tendon;
wherein the harvesting instrument includes a shaft and a cutting portion, and the guide and the harvesting instrument are configured to cooperate and define a trajectory of the harvesting instrument along the native tendon longitudinal axis, the trajectory defining a first direction, and also define a depth of cut with the cutting portion into the native tendon, the depth of cut extending in a second direction angularly offset from the first direction and thereby form a uniform tendon graft thickness.

2. The tendon harvesting system of claim 1 wherein the guide includes a handle extending from the first end and configured to place the guide subcutaneously.

3. The tendon harvesting system of claim 1 wherein the opening defines a non-circular shape.

4. The tendon harvesting system of claim 1 wherein the guide is shaped in a “C” or “U”.

5. The tendon harvesting system of claim 1 wherein the guide is configured to retract a tissue that is adjacent the native tendon.

6. The tendon harvesting system of claim 1 wherein the guide is configured to flex.

7. The tendon harvesting system of claim 1 wherein the guide is a unibody.

8. The tendon harvesting system of claim 1 further comprising a transecting means, wherein the guide is configured to place the transecting means at the tapered end, to selectively transect an end of the tendon graft from the native tendon.

9. The tendon harvesting system of claim 1 wherein the harvesting instrument comprises two parallel blades, configured to form two lateral sides of the tendon graft simultaneously.

10. The tendon harvesting system of claim 9 , wherein the harvesting instrument comprises a surfing surface configured to surf an anterior surface of the native tendon, as the two parallel blades extend along and into the native tendon.

11. The tendon harvesting system of claim 1 wherein the harvesting instrument is configured to slide along the native tendon with the shaft sliding above the native tendon, while the cutting portion extends into and cuts along the native tendon.

12. A tendon harvesting system for forming a tendon graft from a native tendon comprising:
a harvesting instrument having a shaft and a blade, the shaft defining a longitudinal axis, and the blade extending at an angular offset away from the longitudinal axis; and
a guide defining an elongate body with a first end and a tapered second end including;
a reference surface extending between the first end and the tapered second end, configured to extend subcutaneously along a longitudinal axis of the native tendon; and
an opening through the guide configured to receive the blade of the harvesting instrument therethrough to guide access of the blade to the native tendon; wherein the guide and the harvesting instrument are configured to cooperate and define both a pathway of the harvesting instrument along the native tendon and a depth of cut of the blade into the native tendon to form a uniform tendon graft thickness.

13. The tendon harvesting system of claim 12 further comprising a handle extending from the first end and configured to place the guide subcutaneously.

14. The tendon harvesting system of claim 12 wherein the opening defines a non-circular shape.

15. The tendon harvesting system of claim 12 wherein the guide is shaped in a “C” or “U”.

16. The tendon harvesting system of claim 12 wherein the guide is a flexible unibody.

17. The tendon harvesting system of claim 12 further comprising a truncating blade, and wherein the opening is also configured to guide a location of the truncating blade towards the tapered end to selectively terminate an end of the tendon graft from the native tendon.

18. The tendon harvesting system of claim 12 wherein the harvesting instrument comprises two parallel blades disposed at the end of the shaft and away from the shaft longitudinal axis, configured to form two lateral sides of the tendon graft simultaneously.

19. The tendon harvesting system of claim 18 wherein the harvesting instrument comprises a surfing surface configured to surf an anterior surface of the native tendon, as the two parallel blades extend along and into the native tendon.

20. The tendon harvesting system of claim 12 wherein the harvesting instrument is configured to be inserted through the guide opening to place the blade on an exterior surface of the native tendon and then rotate the harvesting instrument to place the blade into the native tendon.

Assignees

• Smith & Nephew Inc
• Smith & Nephew Orthopaedics Ag
• Smith & Nephew Asia Pacific Pte Ltd

Inventors

• Jones Dean
• Torrie Paul Alexander

Classifications

• A61B17/1637

  Hollow drills or saws producing a curved cut, e.g. cylindrical (A61B10/025, A61B17/1695 take precedence) · CPC title

• A61F2/4644

  Preparation of bone graft, bone plugs or bone dowels, e.g. grinding or milling bone material (bone material A61F2/28; disintegrating or milling devices B02C) · CPC title

• A61F2/08

  Muscles; Tendons; Ligaments · CPC title

• A61B17/1764 Primary

  for the knee · CPC title

• A61B17/1635 Primary

  for grafts, harvesting or transplants · CPC title