Systems And Methods For Determining A Joint Center Of Rotation During A Procedure

Patent metadata

Field	Value
Publication number	US-2023310094-A1
Application number	US-202318207925-A
Country	US
Kind code	A1
Filing date	Jun 9, 2023
Priority date	Oct 29, 2015
Publication date	Oct 5, 2023
Grant date	—

Abstract

Systems and methods are described to determine joint center of rotation during a procedure. Joint center measurements may be useful to determine other clinically relevant measurements and/or to assist with replacement surgery.

First claim

We claim:

1 . A system to determine a center of rotation of a joint during a surgical procedure, comprising:
an electronic guidance system comprising a target to generate relative poses between a first bone and an object, wherein the first bone and the object are connected via the joint having the center of rotation; and a computing unit comprising circuitry configured to:
collect an articulation data set comprising poses from the electronic guidance system wherein the poses relate to a target attached to a tool, and wherein the tool is articulated about the center of rotation; and
calculate a joint center of rotation responsive to the articulation data set to guide the surgical procedure.

2 . The system of claim 1 , wherein the joint is a native joint of a patient.

3 . The system of claim 2 , wherein the object is a femur of the patient and the tool comprises a corkscrew tool attached to a part of the femur.

4 . The system of claim 3 , wherein the part of the femur is a resected femoral head prior to dislocation.

5 . The system of claim 2 , wherein the computing unit is further configured to: after a reconstruction of the native joint to define a reconstructed joint having a second center of rotation, collect a second articulation data set of the reconstructed joint; and calculate a second joint center of rotation from rotation of the target about the second center of rotation of the reconstructed joint.

6 . The system of claim 5 , wherein the computing unit is further configured to calculate a spatial difference between the joint center of rotation of the native joint and the second joint center of rotation.

7 . The system of claim 6 , wherein the computing unit is further configured to display the spatial difference.

8 . The system of claim 1 , wherein the center of rotation is of a reconstructed joint comprising implant components.

9 . The system of claim 8 , wherein the tool comprises a distal end configured to mate with a spherical implant component.

10 . The system of claim 9 , wherein the implant component is a liner component, and the tool is a liner insertion tool.

11 . The system of claim 1 , wherein the surgical procedure is a joint replacement, and the joint is one of: a hip joint and a shoulder joint.

12 . The system of claim 1 , wherein the surgical procedure is a direct anterior hip replacement.

13 . The system of claim 1 , wherein the computing unit is further configured to calculate a change in limb length based on the joint center of rotation.

14 . The system of claim 1 , wherein the computing unit is further configured to guide a collection of the articulation data set, displaying information via a display device for performing the collection.

15 . The system of claim 14 further configured to detect an error as a pose is collected, comparing a pose to an expected profile determine from prior poses.

16 . A method to determine a center of rotation of a joint during a surgical procedure, the method comprising:
collecting an articulation data set comprising poses from an electronic guidance system comprising a target to generate relative poses between a first bone and an object, wherein:
the first bone and the object are connected via the joint having the center of rotation; and
the poses of the articulation data set relate to the target attached to a tool as the tool is articulated about the center of rotation; and
calculating a joint center of rotation responsive to the articulation data set to guide the surgical procedure.

17 . The method of claim 16 comprising:
determining a second joint centre of rotation the joint after a reconstruction;
calculating a spatial difference between the joint center of rotation and the second joint center of rotation; and
displaying the spatial difference.

18 . The method of claim 16 comprising guiding a collection of the articulation data set, displaying information via a display device for performing the collection.

19 . A method comprising:
preparing a joint of a patient for a surgical procedure, the joint connecting a first bone to an object and the joint having a center of rotation; coupling to the object a target of an electronic guidance system configured to generate relative poses between the first bone and the object using the target; rotating the target about the center of rotation to provide an articulation data set comprising poses from the electronic guidance system to a computing unit configured to calculate a joint center of rotation for the joint responsive to the articulation data set.

20 . The method of claim 18 further comprising:
reconstructing the joint;
mating an implant interfacing tool with the joint as reconstructed, the interfacing tool coupled to the target;
using the electronic guidance system and the computing unit to determine a second joint center of rotation for the joint as reconstructed; and
receiving joint center of rotation difference information from the computing unit.

Assignees

• Intellijoint Surgical Inc

Inventors

• Mccabe Samantha
• Galea Kirsten
• Morency Kevin
• Hladio Andre Novomir
• Fanson Richard Tyler

Classifications

• A61B34/20 Primary

  Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis · CPC title

• A61B5/066

  Superposing sensor position on an image of the patient, e.g. obtained by ultrasound or x-ray imaging · CPC title

• A61F2/34

  Acetabular cups · CPC title

• A61F2/4609

  of acetabular cups · CPC title

• A61B5/4571

  Evaluating the hip · CPC title