# Patent

## Title
Percutaneous catheter with encapsulating receptacle

## Abstract

Once the ligament is implanted within a patient, the ligament will be subject to tissue ingrowth as discussed above, thereby strengthening the ligament and also the anchoring of the ligament to the bones.

## Background
## Claims

1. A tool for extracting a cylindrical bone plug from a bone in which an annular channel has been formed to define the periphery of said bone plug, said tool being adapted to sever the base of said plug from the bone to enable complete separation of the plug from the bone, the tool comprising: open-ended cylinder adapted to receive the bone plug; extending from said other end; bone with the bone plug being receivable within the open-ended cylinder, said slot defining an arcuate void region of the annular space in the bone; the tool which is diametrically opposed to the longitudinal slot whereby said indicia marks an area to be struck.

2. A bone plug extractor tool as defined in claim 1, wherein the angle circumscribed by said slot is between about 30.degree. and less than 180.degree. .

3. A bone plug extractor tool as defined in claim 1, wherein the angle circumscribed by said slot is from about 70.degree. to about 90.degree. .

4. A bone plug extractor tool as defined in claim 1, wherein the indicia comprises a flattened bearing surface, said flattened bearing surface defining a strikable surface.

5. A bone plug extension tool as defined in claim 1, in combination with a set of tools for use in the surgical replacement of prosthetic ligaments comprising a clamp with a guide for locating the axis along which a bore is required for fixation of a ligament, a reamer cooperable with the clamp for removing an annulus of bone dust, said plug extractor in accordance with claim 1, having the same outside diameter as the reamer, and a cylindrical drill bit guide of the same outside diameter as the reamer and bone plug extractor.

6. A tool for extracting a cylindrical bone plug from a bone in which an annular channel has been formed to define the periphery of said bone plug, said tool being adapted to sever the base of said plug from the bone to enable complete separation of the plug from the bone, the tool comprising: open-ended cylinder at the extreme of said other end adapted to receive the bone plug; extending from said other end; and bone with the bone plug being receivable within the open-ended cylinder, said slot defining an arcuate void region of the annular space in the bone.

7. A tool as defined in claim 6, wherein the angle circumscribed by said slot is between about 30.degree. and less than 180.degree..

8. A tool as defined in claim 6, wherein the angle circumscribed by said slot is from about 70.degree. to about 90.degree..

9. A tool as defined in claim 6, further comprising: diametrically opposed to the longitudinal slot.

10. A tool as defined in claim 6, wherein the indicia comprises a flattened bearing surface, said flattened bearing surface defining a strikable surface.

11. A tool as defined in claim 6 in combination with a set of tools for use in the surgical replacement of prosthetic ligaments comprising a clamp with a guide for locating the axis along which a bore is required for fixation of a ligament, a reamer cooperable with the clamp for removing an annulus of bone dust, a said tool as defined in claim 6, having the same outside diameter as the reamer, and a cylindrical drill bit guide of the same outside diameter as the reamer and said tool as defined in claim 6.