Surgical apparatus having a medial plate and a lateral plate and method therefore

Patent metadata

Field	Value
Publication number	US-10772640-B2
Application number	US-201715852030-A
Country	US
Kind code	B2
Filing date	Dec 22, 2017
Priority date	Dec 22, 2016
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

A measurement system for installation of a prosthetic component. The measurement system comprises a housing, a slide block, a medial plate, a lateral plate, a fixed plate, and a threaded shaft. The fixed plate couples to the housing. The threaded shaft couples to the slide block. The threaded shaft is rotated to move the slide block within the housing. The slide block includes a free wheel gear. A medial plate and a lateral plate respectively couple to a medial post and a lateral post. The medial post and lateral post each have gear teeth that is configured to couple the free wheel gear. The housing retains, aligns and supports movement of the medial and lateral post parallel to the slide block. A medial brake and a lateral brake is configured to couple to the medial post and the lateral post to prevent movement under user control.

First claim

What is claimed is:

1. A surgical apparatus to support installation of a prosthetic component comprising:
a housing;
a slide block having a free wheel gear;
a medial plate coupled to a medial post
a lateral plate coupled to a lateral post wherein the free wheel gear is between the medial and lateral post and wherein gear teeth of the free wheel gear engages with the medial and lateral post; and
a threaded shaft coupling through the housing to the slide block wherein the threaded shaft is operatively coupled to the slide block, and wherein the threaded shaft is configured to rotate to move the slide block and at least one of the medial plate or the lateral plate.

2. The surgical apparatus of claim 1 further including a fixed plate wherein the fixed plate couples to the housing and wherein the medial plate or the lateral plate is configured to move relative to the fixed plate.

3. The surgical apparatus of claim 1 further including at least one gauge to measure a medial-lateral tilt angle, a height of a medial compartment, or a height of a lateral compartment.

4. The surgical apparatus of claim 1 wherein the housing has a structure having an opening, wherein a surface within the opening of the structure is a bearing surface, wherein the threaded shaft couples through the opening, and wherein the threaded shaft has a non-threaded region coupling to the bearing surface to support rotation of the threaded shaft and align the threaded shaft within the housing.

5. The surgical apparatus of claim 1 wherein the housing has a structure having an opening, wherein a surface of the opening of the structure is threaded, wherein the threads of the opening engage with the threaded shaft and align the threaded shaft within the housing.

6. The surgical apparatus of claim 5 wherein the structure having the opening is formed on a distal end of the housing, wherein a knob configured for user rotation couples to the distal end of the threaded shaft, and wherein the slide block couples to the structure of the housing when the medial plate and the lateral plate are in a minimum height position.

7. The surgical apparatus of claim 1 wherein the medial post and the lateral post are configured to move parallel to the slide block and wherein the housing is configured to retain and align the medial post for movement and wherein the housing is configured to retain and align the lateral post for movement.

8. The surgical apparatus of claim 7 wherein tongue and grooves are configured to align, retain, and support movement of the medial post and the lateral post in the housing.

9. The surgical apparatus of claim 1 further including:
a medial brake configured to prevent movement of the medial post; and
a lateral brake configured to prevent movement of the lateral post.

10. The surgical apparatus of claim 9 wherein the medial brake and the lateral brake are configured to brake by friction.

11. A surgical apparatus configured to support installation of a prosthetic component comprising:
a housing;
a slide block having a free wheel gear;
a medial plate;
a medial post coupled to the medial plate;
a medial brake coupled to the medial plate wherein the medial brake is configured to prevent movement of the medial plate;
a lateral plate;
a lateral post coupled to the lateral plate wherein the medial and lateral posts each have gear teeth, wherein the free wheel gear is between the medial and lateral posts, wherein the free wheel gear couples to the gear teeth of the medial post, and wherein the free wheel gear couples to the pear teeth of the lateral post;
a lateral brake coupled to the lateral plate wherein the lateral brake is configured to prevent movement of the lateral plate;
a fixed plate coupled to the housing; and
a threaded shaft coupling through the housing to the slide block wherein the threaded shaft is operatively coupled to the slide block and configured to rotate to move the slide block.

12. The surgical apparatus of claim 11 further including at least one gauge to measure a medial-lateral tilt angle, a height of a medial compartment, or a height of a lateral compartment.

13. The surgical apparatus of claim 11 wherein the medial post and the lateral post are configured to move parallel to the slide block and wherein tongue and grooves are configured to align, retain, and support movement of the medial post and the lateral post in the housing.

14. The surgical apparatus of claim 13 wherein at least one tongue is formed on the housing, wherein the grooves are formed in the medial post and the lateral post, wherein the medial brake is configured to apply pressure to the medial post to prevent movement of the medial post, and wherein the lateral brake is configured to apply pressure to the lateral post to prevent movement of the lateral post.

15. The surgical apparatus of claim 14 further including a knob coupled to a distal end of a threaded shaft.

16. A surgical apparatus configured to support installation of a prosthetic component comprising:
a housing;
a slide block having a single free wheel gear;
a medial plate;
a medial post coupled to medial plate wherein the medial post is configured to move and wherein the medial post includes gear teeth coupled to the single free wheel gear on a first side;
a lateral plate;
a lateral post coupled to the lateral plate wherein the lateral post is configured to move and wherein the lateral post includes gear teeth coupled to the single free wheel gear on a second side; and
a fixed plate coupled to the housing;
a threaded shaft coupling through the housing to the slide block wherein the threaded shaft is operatively coupled to the slide block and configured to rotate thereby raising or lowering the slide block and at least one of the medial or lateral plate relative to the fixed plate by way of the single free wheel gear and the medial or lateral post.

17. The surgical apparatus of claim 16 wherein the medial post and the lateral post are on opposing sides of the free wheel gear.

18. The surgical apparatus of claim 17 wherein the housing is configured to retain and align the medial post for movement, wherein the housing is configured to retain and align the lateral post for movement, and wherein the medial post and the lateral post are configured to move parallel to the slide block.

19. The surgical apparatus of claim 16 wherein the free wheel gear is at a proximal end of the slide block.

20. The surgical apparatus of claim 16 further including:
a medial brake configured to prevent movement of the medial plate; and

a lateral brake configured to prevent movement of the lateral plate.

Assignees

• Orthosensor Inc

Inventors

• Trabish Masei
• Roche Martin
• Delevic Ivan
• Goodchild Gordon
• Jai Lee Byung

Classifications

• A61B17/025 Primary

  Joint distractors · CPC title

• A61B17/1764

  for the knee · CPC title

• A61F2002/30556

  for adjusting thickness · CPC title

• A61F2002/30522

  releasable, e.g. using a releasable ratchet · CPC title

• A61F2002/30616

  Sets comprising a plurality of prosthetic parts of different sizes or orientations · CPC title