Retro guidewire reamer

Patent metadata

Field	Value
Publication number	US-10758252-B2
Application number	US-201816152483-A
Country	US
Kind code	B2
Filing date	Oct 5, 2018
Priority date	Mar 12, 2013
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

A retro guidewire reamer includes a cutting member, and a mechanism for moving the cutting member from a closed position to a deployed position in a single manual motion. Once a desired size of a bone tunnel is established, a surgeon uses the reamer to create a primary bone tunnel over a guidewire from the outside in. The surgeon retracts the guidewire, and activates the mechanism to deploy the cutting member within the bone joint to conform to the size of a tendon graft. The surgeon uses the deployed cutting member to create a counter bore through the bone in a retrograde manner. Once the counter bore is drilled, the surgeon activates the mechanism to close the cutting member, allowing the reamer to be withdrawn through the primary tunnel. The retro guidewire reamer can be used to provide more accurate bone tunnel placement during ligament reconstruction surgery.

First claim

What is claimed is:

1. A method of performing an arthroscopic surgical procedure, comprising:
disposing a surgical instrument including a cannulated shaft over a guidewire, the surgical instrument further including:
a cutting member movably disposed adjacent a distal end of the cannulated shaft, the cutting member being configured to move between a closed position where a central axis thereof is coincident with a longitudinal axis of the cannulated shaft, and a deployed position where the central axis of the cutting member is disposed at an angle to the longitudinal axis of the cannulated shaft; and
a drive bushing configured for axial movement along an outer surface of the cannulated shaft for moving the cutting member between the closed position and the open position;

while the cutting member is in the closed position, drilling a tunnel through bone over the guidewire in an antegrade manner;
using the drive bushing, moving the cutting member from the closed position to the deployed position; and
while the cutting member is in the deployed position:
engaging the cutting member with the guidewire to prevent movement of the cutting member from the deployed position; and
drilling, by the cutting member, a counter bore through the bone over the guidewire in a retrograde manner.

2. The method of claim 1 wherein the cutting member has a cannulated sidewall with sharpened edges at a forward circumferential end thereof, and wherein the drilling of the tunnel includes drilling the tunnel through the bone over the guidewire using the sharpened edges at the forward circumferential end of the cannulated sidewall of the cutting member.

3. The method of claim 1 wherein the cutting member has a cannulated sidewall with sharpened edges on an outside surface thereof, and wherein the drilling of the counter bore includes drilling the counter bore through the bone over the guidewire using the sharpened edges on the outside surface of the cannulated sidewall.

4. The method of claim 1 further comprising:
while the cutting member is in the closed position, retracting the guidewire within the cannulated shaft to allow the cutting member to move from the closed position where its central axis is coincident with the longitudinal axis of the cannulated shaft, to the deployed position where its central axis is disposed at the angle to the longitudinal axis of the cannulated shaft.

5. The method of claim 1 further comprising:
while the cutting member is in the deployed position, advancing the guidewire within the cannulated shaft to prevent movement of the cutting member from the deployed position during use.

6. The method of claim 1 wherein said drilling the tunnel through bone over the guidewire in an antegrade manner comprises drilling the tunnel with the distal end of the cannulated shaft, the distal end of the cannulated shaft comprising a drill bit.

7. The method of claim 1 further comprising securing the guidewire within the cannulated shaft with a locking mechanism, the locking mechanism being included in the drive bushing.

8. The method of claim 1 wherein the at least one cutting member defines a hole through the cutting member adapted to accommodate passage of the guidewire therethrough least while in the deployed position.

9. The method of claim 8 wherein the hole is configured to be engageable with a structural feature of the guidewire while in the deployed position.

Assignees

• Smith & Nephew Inc

Inventors

• Bourque Bernard J
• Callaghan David J
• Ferragamo Michael C

Classifications

• A61B17/1631 Primary

  Special drive shafts, e.g. flexible shafts (A61B17/1642, A61B17/164 take precedence) · CPC title

• A61B17/1633

  Sleeves, i.e. non-rotating parts surrounding the bit shaft, e.g. the sleeve forming a single unit with the bit shaft (A61B17/1644 takes precedence) · CPC title

• A61B17/1617

  with mobile or detachable parts · CPC title

• A61B17/1624

  Drive mechanisms therefor · CPC title

• A61B17/1697

  specially adapted for wire insertion · CPC title