System and method for intraoperative joint contact mechanics measurement

• US 10,070,972 B2
• Filed: 10/05/2015
• Issued: 09/11/2018
• Est. Priority Date: 10/03/2014
• Status: Active Grant

• Current Assignee: Hospital For Special Surgery (The NewYork-Presbyterian Healthcare System, Inc.)
• Original Assignee: Hospital For Special Surgery (The NewYork-Presbyterian Healthcare System, Inc.)
• Inventors: Maher, Suzanne, Rodeo, Scott, Warren, Russell, Wang, Hongsheng, Lustri, Mario
• Primary Examiner(s): Yang, Andrew
• Application Number:
  US14/875,230
• Publication Number:
  US 20160100905A1
• Time in Patent Office: 1,072 Days
• CPC Class Codes: A61B 2017/00022 Sensing or detecting at the treatment site
• CPC Class Codes: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61B 2090/065 for measuring contact or contact pressure
• CPC Class Codes: A61B 2090/066 for measuring torque
• CPC Class Codes: A61B 2505/05 Surgical care
• CPC Class Codes: A61B 2562/0247 Pressure sensors
• CPC Class Codes: A61B 2562/0252 Load cells
• CPC Class Codes: A61B 5/4528 Joints A61B5/4533, A61B5/4538 take precedence
• CPC Class Codes: A61B 5/4576 Evaluating the shoulder
• CPC Class Codes: A61B 5/4585 Evaluating the knee
• CPC Class Codes: A61B 5/4884 inducing physiological or psychological stress, e.g. applications for stress testing
• CPC Class Codes: A61B 5/6867 specially adapted to be attached or implanted in a specific body part A61B5/6847 takes precedence
• CPC Class Codes: A61B 5/743 Displaying an image simultaneously with additional graphical information, e.g. symbols, charts, function plots
• CPC Class Codes: A61B 90/06 Measuring instruments not otherwise provided for
• CPC Class Codes: A61B 90/60 Supports for surgeons, e.g. chairs or hand supports seats for dentists or surgeons associated with dental chairs or operating chairs A61G15/00
• CPC Class Codes: A61F 2/3872 Meniscus for implantation between the natural bone surfaces
• CPC Class Codes: A61F 2/4657 Measuring instruments used for implanting artificial joints for surgical instruments A61B90/06
• CPC Class Codes: A61F 2002/4666 for measuring force, pressure or mechanical tension
• CPC Class Codes: A61F 2002/4667 for measuring torque

Abstract

A method for intraoperatively measuring joint contact mechanics of a patient'"'"'s joint is provided. The method includes inserting a sensor between first and second bones of a joint. Then a predetermined force is applied to one of the first and second bones. Afterwards, contact mechanics such as, contact stresses, contact areas and/or forces are measured between the first and second bones in response to the applied predetermined force.

Claims

1. A method for intraoperatively measuring joint contact mechanics of a patient'"'"'s joint comprising:

inserting a sensor between first and second bones of a joint;

applying a predetermined force to one of the first and second bones;

using a load cell, measuring the applied predetermined force; and

using the sensor, measuring contact mechanics between the first and second bones in response to the applied predetermined force.

2. The method of claim 1, wherein the predetermined force is a linear force, a torque or a moment.

3. The method of claim 1, wherein the step of applying a predetermined force comprises rotating the joint throughout a range of motion, or displacing or translating one of the first and second bones relative to the other of the first and second bones.

4. The method of claim 1, further comprising tracking movement of the first and second bones in response to the applied predetermined force using a surgical navigation system.

5. The method of claim 1, further comprising mitigating joint interaction about areas of measured contact stresses or contact areas.

6. The method of claim 5, wherein the mitigating step comprises applying scaffolds, sutures, biological augments, or tissue resection to one of the first and second bones.

7. The method of claim 5, wherein the mitigating step comprises replacing or resurfacing the joint with an orthopedic implant.

8. The method of claim 1, wherein the measuring step comprises intraoperatively measuring a plurality of contact mechanics at various times.

9. The method of claim 1, further comprising developing a contact stress map based on the measured contact stresses.

10. The method of claim 1, wherein the measuring step includes measuring the location of a contact area, a contact stress, forces or moments between the first and second bones in response to the applied predetermined force.

11. The method of claim 1, wherein the inserting step comprises inserting the sensor between at least one of a tendon, a cartilage, and a meniscus, and the first bone.

12. The method of claim 1, further comprising:

applying another predetermined force to one of the first and second bones of the joint;

using the load cell, measuring the applied another predetermined force; and

using the sensor, measuring contact mechanics between the first and second bones in response to the applied another predetermined force.

13. A system for intraoperatively measuring joint contact mechanics of a patient'"'"'s joint comprising:

a sensor for measuring joint contact stresses between first and second bones of the joint;

a load cell spaced from and movable relative to the sensor for measuring forces applied to one of the first and second bones; and

a computer operatively in communication with the sensor and the load cell to record contact mechanics measured by the sensor and applied forces measured by the load cell upon application of forces to one of the first and second bones.

14. The system of claim 13, wherein the sensor includes sutures for securing to soft tissue adjacent one of the first and second bones.

15. The system of claim 13, further comprising a surgical navigation system configured to track the first and second bones upon application of forces to the first and second bones.

16. The system of claim 13, wherein the sensor comprises shape memory alloy.

17. The system of claim 13, further comprising an instrumented surgical mount that includes:

a fastener for attaching to a patient;

the load cell mounted to the fastener;

a force plate mounted between the fastener and the load cell; and

a handle assembly attachable to the load cell.

18. A method for intraoperatively measuring joint contact mechanics of a patient'"'"'s joint comprising:

inserting a sensor between first and second bones of a joint and suturing the sensor to soft tissue adjacent one of the first and second bones;

applying a predetermined force to one of the first and second bones; and

measuring contact mechanics between the first and second bones in response to the applied predetermined force.

19. A method for intraoperatively measuring joint contact mechanics of a patient'"'"'s joint comprising:

inserting a sensor between first and second bones of a joint by rolling the sensor into a rolled configuration, inserting the rolled sensor into a cannula, inserting the cannula into the joint, and unrolling the sensor within the joint;

applying a predetermined force to one of the first and second bones; and

measuring contact mechanics between the first and second bones in response to the applied predetermined force.