METHOD FOR PERFORMING AN ORTHOPAEDIC SURGICAL PROCEDURE

• US 20100249789A1
• Filed: 03/31/2009
• Published: 09/30/2010
• Est. Priority Date: 03/31/2009
• Status: Active Grant

• Current Assignee: Depuy Ireland Unlimited Company (Johnson & Johnson)
• Original Assignee: Depuy (Johnson & Johnson)
• Inventors: Sherman, Jason T., Bertazzoni, Mario, Rock, Mick
• Granted Patent: US 8,721,568 B2
• Time in Patent Office: Days
• US Class Current: 606/88
• CPC Class Codes: A61B 17/0206 with antagonistic arms as supports for retractor elements
• CPC Class Codes: A61B 17/025 Joint distractors
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 17/2812 with a single pivotal connection A61B17/29 takes precedence
• CPC Class Codes: A61B 17/2833 Locking means
• CPC Class Codes: A61B 2017/0268 for the knee
• CPC Class Codes: A61B 2017/2837 with a locking ratchet
• CPC Class Codes: A61B 2034/2051 Electromagnetic tracking systems
• CPC Class Codes: A61B 2034/252 indicating steps of a surgical procedure
• CPC Class Codes: A61B 2090/065 for measuring contact or contact pressure
• CPC Class Codes: A61B 34/25 User interfaces for surgical systems

Abstract

A method for performing an orthopaedic surgical procedure on a knee joint of a patient includes resecting a proximal end of a patient'"'"'s tibia to create a resected surface of the patient'"'"'s tibia and positioning a tibial paddle of a sensor module on the proximal end of the patient'"'"'s tibia. The tibial paddle includes a sensor array generating sensor signals indicative of the joint force of the patient'"'"'s knee joint. The method also includes performing a number of orthopaedic surgical steps while monitoring a display of the sensor module that provides a visual indication of the medial-lateral balance of the joint force of the patient'"'"'s knee joint.

Claims

1. A method for performing an orthopaedic surgical procedure on a knee joint of a patient, the method comprising:

resecting a proximal end of a patient'"'"'s tibia to create a resected surface of the patient'"'"'s tibia;

positioning a tibial paddle of a sensor module on the resected surface of the patient'"'"'s tibia, the tibial paddle including a sensor array,

distracting the patient'"'"'s knee joint while the knee joint is in extension;

monitoring a display of the sensor module, the display providing a visual indication of the medial-lateral joint force balance of the patient'"'"'s knee joint; and

performing a balancing procedure to adjust the medial-lateral balance as indicated by the display of the sensor module

2. The method of claim 1, wherein distracting the patient'"'"'s knee joint comprises positioning a joint distractor in the patient'"'"'s knee joint such that a medial tibial paddle of the joint distractor and a lateral tibial paddle of the joint distractor each contact the tibial paddle of the sensor module.

3. The method of claim 2, wherein distracting the patient'"'"'s knee joint comprises coupling the sensor module to the joint distractor.

4. The method of claim 2, wherein distracting the patient'"'"'s knee joint comprises:

moving a medial femoral paddle of the joint distractor away from a corresponding medial tibial paddle of the joint distractor medial femoral paddle, and

moving a lateral femoral paddle of the joint distractor away from a corresponding lateral medial paddle of the joint distractor.

5. The method of claim 4, wherein distracting the patient'"'"'s knee joint comprises establishing a substantially rectangular gap between the patient'"'"'s proximal tibia and a distal femur.

6. The method of claim 1, wherein distracting the patient'"'"'s knee joint comprises positioning a spacer block on the tibial paddle of the sensor module.

7. The method of claim 1, wherein performing a balancing procedure comprises performing a ligament release on the patient'"'"'s soft tissue.

8. The method of claim 1, further comprising:

positioning the knee joint in flexion, and

distracting the knee joint in flexion to a predetermined medial-lateral balance value by monitoring the display of the sensor module.

9. The method of claim 8, further comprising performing a number of resectioning cuts on the distal end of the patient'"'"'s femur while the knee joint is distracted in flexion.

10. The method of claim 8, wherein distracting the knee joint in flexion comprises positioning a joint distractor in the patient'"'"'s knee joint such that a medial tibial paddle of the joint distractor and a lateral tibial paddle of the joint distractor each contact the tibial paddle of the sensor module.

11. The method of claim 10, wherein distracting the patient'"'"'s knee joint comprises coupling the sensor module to the joint distractor.

12. A method for performing an orthopaedic surgical procedure on a knee joint of a patient, the method comprising:

resecting a proximal end of a patient'"'"'s tibia to create a resected surface of the patient'"'"'s tibia;

positioning a tibial paddle of a sensor module on the resected surface of the patient'"'"'s tibia, the tibial paddle including a sensor array positioned therein,

distracting the patient'"'"'s knee joint to establish a substantially rectangular gap between the patient'"'"'s proximal tibia and distal femur;

monitoring a visual indication of the relative balance of a medial joint force and a lateral joint force of the patient'"'"'s knee joint displayed on the display of the sensor module; and

performing a balancing procedure on the patient'"'"'s knee joint until the medial joint force and the lateral joint force are within a first predetermined percentage of each other as indicated on the visual indication displayed on the display module.

13. The method of claim 12, wherein distracting the patient'"'"'s knee joint comprises positioning a joint distractor in the patient'"'"'s knee joint such that a medial tibial paddle of the joint distractor and a lateral tibial paddle of the joint distractor each contact the tibial paddle of the sensor module.

14. The method of claim 13, wherein distracting the patient'"'"'s knee joint comprises coupling the sensor module to the joint distractor.

15. The method of claim 13, wherein distracting the patient'"'"'s knee joint comprises:

moving a medial femoral paddle of the joint distractor away from a corresponding medial tibial paddle of the joint distractor medial femoral paddle, and

moving a lateral femoral paddle of the joint distractor away from a corresponding lateral medial paddle of the joint distractor.

16. The method of claim 12, wherein distracting the patient'"'"'s knee joint comprises positioning a spacer block on the tibial paddle of the sensor module.

17. The method of claim 12, wherein performing a balancing procedure comprises performing a ligament release on the patient'"'"'s soft tissue.

18. The method of claim 12, further comprising:

positioning the knee joint in flexion, and

distracting the knee joint in flexion until the medial joint force and the lateral joint force are within a second predetermined percentage of each other as indicated on the visual indication displayed on the display module.

19. The method of claim 18, further comprising performing a number of resectioning cuts on the distal end of the patient'"'"'s femur while the knee joint is distracted in flexion.

20. A method for performing an orthopaedic surgical procedure on a knee joint of a patient, the method comprising:

positioning a tibial paddle of a sensor module on a resected proximal end of a patient'"'"'s tibia, the tibial paddle including a sensor array positioned therein,

distracting the patient'"'"'s knee joint to establish a substantially rectangular gap between the patient'"'"'s proximal tibia and distal femur;

monitoring a plurality of light emitting diodes located on the sensor module, the plurality of light emitting diodes being illuminated in a pattern to provide a visual indication of the relative balance of a medial joint force and a lateral joint force of the patient'"'"'s knee joint displayed on the display of the sensor module; and

performing a ligament release procedure on the patient'"'"'s knee joint until the medial joint force and the lateral joint force are within a first predetermined percentage of each other as indicated by the plurality of light emitting diodes.