Force measuring joint distraction lever

Patent metadata

Field	Value
Publication number	US-2023248349-A1
Application number	US-202318137546-A
Country	US
Kind code	A1
Filing date	Apr 21, 2023
Priority date	May 28, 2014
Publication date	Aug 10, 2023
Grant date	—

Abstract

A joint distraction lever, comprising a lever body comprising a handle portion and a working portion, a distal tip coupled to the working portion, and a fulcrum extending from a bottom surface of the working portion and spaced apart from the distal tip such that the fulcrum is positioned between the distal tip and the handle portion, where the joint distraction lever is configured to determine a distraction force based on deformation of the joint distraction lever.

First claim

What is claimed is:

1 . A joint distraction lever, comprising:
a lever body comprising a handle portion and a working portion; a distal tip coupled to the working portion; and a fulcrum extending from a bottom surface of the working portion and spaced apart from the distal tip such that the fulcrum is positioned between the distal tip and the handle portion, wherein the joint distraction lever is configured to determine a distraction force based on deformation of the joint distraction lever.

2 . The joint distraction lever of claim 1 , wherein the fulcrum is configured to be inserted into a space between a first bone and a second bone.

3 . The joint distraction lever of claim 1 , wherein the distal tip is configured to be inserted into a space between a first bone and a second bone.

4 . The joint distraction lever of claim 1 , wherein the handle portion is configured to receive an external force to cause a torque on the joint distraction lever.

5 . The joint distraction lever of claim 4 , wherein, responsive to the torque on the joint distraction lever, the distal tip is configured to push on a first bone and the fulcrum is configured to push on a second bone causing the deformation of the joint distraction lever.

6 . The joint distraction lever of claim 1 , further comprising an indicator configured to provide feedback demonstrating the distraction force applied at the distal tip.

7 . The joint distraction lever of claim 6 , wherein the feedback indicates a current value of the distraction force has reached a predetermined value.

8 . The joint distraction lever of claim 6 , wherein the indicator is configured to provide visual feedback relating to the distraction force.

9 . The joint distraction lever of claim 8 , wherein the indicator is configured to change from a first state to a second state to indicate a current value of the distraction force has reached a predetermined value.

10 . The joint distraction lever of claim 9 , wherein the indicator is configured to provide a first indication when the distraction force exceeds a first predetermined value and a second indication when the distraction force exceeds a second predetermined threshold.

11 . The joint distraction lever of claim 6 , wherein the indicator includes a plurality of light-emitting diodes configured to provide visual feedback relating to the distraction force.

12 . The joint distraction lever of claim 1 , wherein the fulcrum comprises a pointed tip.

13 . The joint distraction lever of claim 1 , wherein the fulcrum is movable relative to the working portion to vary a distance between the fulcrum and the distal tip.

14 . The joint distraction lever of claim 1 , further comprising a force measurement device configured to measure the distraction force, wherein the force measurement device is at least one of a strain gauge, a piezoelectric pressure sensor, a magnetic contact switch, and an optical sensor comprising an array of optical fibers.

15 . A surgical system, comprising:
a joint distraction lever, comprising:
a lever body comprising a handle portion and a working portion;
a distal tip coupled to the working portion; and
a fulcrum extending from a bottom surface of the working portion and spaced apart from the distal tip such that the fulcrum is positioned between the distal tip and the handle portion,
wherein the joint distraction lever is configured to determine a distraction force based on deformation of the joint distraction lever; and
a computing system configured to provide a surgical plan based on the distraction force.

16 . The surgical system of claim 15 , further comprising a tracking system configured to track position information relating to a bone of a joint and the joint distraction lever.

17 . The surgical system of claim 16 , wherein the computing system is configured to receive, from the tracking system, the position information for the bone of the joint and the joint distraction lever while the joint distraction lever is used to distract the joint.

18 . The surgical system of claim 17 , wherein the computing system is programmed to determine a directional component of a force being applied by the joint distraction lever to the bone of the joint.

19 . The surgical system of claim 17 , wherein responsive to an indicator providing feedback indicating a current value of the distraction force has reached a predetermined value, the tracking system is configured to capture a pose of the bone of the joint.

20 . The surgical system of claim 19 , wherein responsive to moving the bone of the joint to a second position, the tracking system is configured to capture a second pose of the bone of the joint in the second position.

Assignees

• Mako Surgical Corp

Inventors

• Bechtold Kevin
• Otto Jason
• Kang Hyosig
• Iorgulescu Radu

Classifications

• A61B17/025 Primary

  Joint distractors · CPC title

• A61B17/1675

  for the knee · CPC title

• A61B17/16

  Instruments for performing osteoclasis; Drills or chisels for bones; Trepans {(arthroscopic bone cutters A61B17/320016)} · CPC title

• A61B2017/0268

  for the knee · CPC title

• A61B2017/00115

  with audible or visual output · CPC title