Kit for implanting heat deformable fixation elements of different sizes

Patent metadata

Field	Value
Publication number	US-10405909-B2
Application number	US-201514708560-A
Country	US
Kind code	B2
Filing date	May 11, 2015
Priority date	Dec 20, 2010
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

A device for implanting heat deformable fixation elements of different sizes in a bone, comprises a hand piece extending from a proximal end to a distal end and including an internal optical waveguide connected to a laser source and open to the distal end of the hand piece and a light guiding tip extending from a proximal end to a distal end, the proximal end of the light guiding tip being removably mechanically and optically connectable to the distal end of the hand piece and the distal end of the light guiding tip being configured to permit removable attachment of a bone fixation element, the light guiding tip including an optical waveguide, wherein the light guiding tip is configured to control a total radiant energy Q transmitted from the laser source to the bone fixation element.

First claim

What is claimed is:

1. A method for implanting a bone fixation element in a bone, the bone fixation element being heat deformable, the method comprising:
positioning a hand piece and a light guiding tip attached to the hand piece so that the bone fixation element is positioned over a target portion of the bone, wherein the bone fixation element is removably attached to the light guiding tip;
activating a laser source of the hand piece for a time period so as to emit a radiant flux from the laser source, through a first internal optical waveguide of the hand piece, and further through a second optical waveguide of the light guiding tip, to the bone fixation element; and
automatically controlling a total radiant energy transmitted from the laser source to the bone fixation element based on a size of the bone fixation element such that the total radiant energy is sufficient to cause the bone fixation element to soften.

2. The method of claim 1 , wherein the automatically controlling step comprises softening the bone fixation element in response to the controlled total radiant energy applied from the laser source to the bone fixation element.

3. The method of claim 1 , further comprising the step of removing the bone fixation element from the light guiding tip after the bone fixation element has been softened.

4. The method of claim 1 , wherein the time period is a fixed time period, the hand piece further includes a timer, and the controlling step comprises the step of causing the timer to discontinue the activating step after the fixed time period has expired.

5. The method of claim 1 , wherein the time period is an adjustable time period, the hand piece further includes a timer, and the controlling step comprises causing a microprocessor to set the timer so as to define the adjustable time period.

6. The method of claim 5 , wherein the microprocessor is electronically connected to a set-point control of the light guiding tip, and the controlling step further comprises determining the adjustable time period at the microprocessor, based in part on the set-point control of the light guiding tip.

7. The method of claim 6 , wherein the supporting step further comprises electronically connecting the microprocessor to the set-point control of the light guiding tip.

8. The method of claim 1 , wherein the automatic controlling step comprises controlling a magnitude of the radiant flux based on a size of the bone fixation element.

9. The method of claim 1 , wherein the automatic controlling step comprises choosing a magnitude of the radiant flux based on a physical volume of the bone fixation element.

10. The method of claim 1 , wherein the automatic controlling step comprises choosing a magnitude of the radiant flux based on a surface area of the bone fixation element.

11. The method of claim 8 , further comprising the step of absorbing the radiant flux in an energy absorbing element of the light guiding tip so as to reduce the radiant flux that is received by the bone fixation element.

12. The method of claim 11 , wherein the light absorbing element comprises a plurality of elongated sticks made from any one of a high heat capacity metal, a plastic wax, and a chamber containing colored fluid.

13. The method of claim 11 , further comprising, prior to the supporting step, the step of selecting the light guiding tip among a plurality of light guiding tips that accommodate differently sized bone fixation elements and have differently sized energy absorbing elements.

14. The method of claim 9 , wherein the controlling step further comprises controlling the total radiant energy by determining the magnitude of the radiant flux with a microprocessor that is in communication with the laser source.

15. The method of claim 14 , wherein the microprocessor is electronically connected to a set-point control of the light guiding tip, and the controlling step comprises determining at the microprocessor the magnitude of the radiant flux based on the set-point control of the light guiding tip.

16. The method of claim 15 , further comprising the step of communicating the size of the bone element from the set point control to the microprocessor.

17. The method of claim 1 , wherein the controlling step comprises determining one of the time period and the radiant flux at a microprocessor that is in communication with the laser source based on a size of the bone fixation element.

18. The method of claim 17 , wherein the controlling step comprises communicating the size from a set-point control of the light guiding tip to the microprocessor.

19. The method of claim 18 , wherein the controlling step comprises determining the time period at the microprocessor based on the communicated size.

20. The method of claim 18 , wherein the controlling step comprises determining the radiant flux at the microprocessor based on the communicated size.

Assignees

• Depuy Synthes Products Inc

Inventors

• Hulliger Urs

Classifications

• A61B2018/202

  Laser enclosed in a hand-piece · CPC title

• A61B18/22

  the beam being directed along or through a flexible conduit, e.g. an optical fibre; {Couplings or} hand-pieces therefor · CPC title

• A61B2018/00702

  Power or energy · CPC title

• A61B2018/2222

  Fibre material or composition · CPC title

• A61B2018/00565

  Bone · CPC title