DEVICE AND METHOD FOR DISPLAYING JOINT FORCE DATA

• US 20100249659A1
• 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, Bartelme, Michael J., Rock, Mick
• Granted Patent: US 8,556,830 B2
• Time in Patent Office: Days
• US Class Current: 600/587
• CPC Class Codes: A61B 17/025 Joint distractors
• CPC Class Codes: A61B 2017/0268 for the knee
• CPC Class Codes: A61B 2034/2055 Optical tracking systems
• CPC Class Codes: A61B 2090/065 for measuring contact or contact pressure
• CPC Class Codes: A61B 90/06 Measuring instruments not otherwise provided for
• CPC Class Codes: G16H 40/63 for local operation

Abstract

A hand-held display module includes a housing, a display coupled to the housing, and a circuit positioned in the housing and coupled to the display. The circuit includes a receiver circuit configured to communicate with a sensor module positioned in a knee joint of a patient to receive joint force data indicative of the joint force of the patient'"'"'s knee joint. In one mode, the circuit is configured to display a visual indication of the medial-lateral balance of the joint force based on the joint force data. In a second mode, the circuit is configured to display a visual indication of the medial-lateral and the anterior-posterior balance of the joint force.

Claims

1. A hand-held display module comprising:

a housing sized to be hand-holdable by an orthopaedic surgeon;

a display coupled to the housing; and

a circuit positioned in the housing, the circuit including a receiver circuit configured to receive joint force data indicative of the joint force between a patient'"'"'s tibia and femur,

wherein the circuit is configured to determine a joint force value indicative of the medial-lateral balance of the joint force based on the joint force data and display a visual indication on the display of the medial-lateral balance of the joint force based on the joint force value.

2. The hand-held display module of claim 1, wherein the circuit is configured to:

determine a medial force value indicative of a medial component of the joint force based on the joint force data,

determine a lateral force value indicative of a lateral component of the joint force based on the joint force data, and

display the medial force value and the lateral force value on the display.

3. The hand-held display module of claim 2, wherein the circuit is configured to determine an average force value based on the medial force value and the lateral force value and display the average force value on the display.

4. The hand-held display module of claim 2, wherein the circuit is configured to:

display a background image on the display, the background image including a pair of vertical lines, and

display an icon on the display between the pair of vertical lines when the medial force value and the lateral force value are within a predetermined percentage of each other.

5. The hand-held display module of claim 1, wherein the circuit is configured to display an icon on the display in a position that provides a visual indication of the medial-lateral balance of the joint force.

6. The hand-held display module of claim 5, wherein the circuit is configured to:

display a horizontal bar on the display,

display an icon on the horizontal bar, wherein the position of the icon on the horizontal bar is indicative of the medial-lateral balance of the joint force.

7. The hand-held display module of claim 1, wherein the circuit is configured to:

determine a joint force value indicative of the medial-lateral balance and the anterior-posterior balance of the joint force, and

display a visual indication on the display of the medial-lateral and the anterior-posterior balance of the joint force based on the joint force value.

8. The hand-held display module of claim 7, wherein the circuit is configured to display an icon on the display in a position that provides a visual indication of the medial-lateral and anterior-posterior balance the joint force.

9. The hand-held display module of claim 7, wherein the circuit is configured to display a bar on the display, the bar having a first end corresponding to a medial side and a second end corresponding to a lateral side, the circuit being configured to position the first and second ends of the bar based on the anterior-posterior balance of the joint force.

10. The hand-held display module of claim 1, further comprising a screenshot button usable to store a screenshot of an image displayed on the display.

11. The hand-held display module of claim 10, wherein the circuit is configured to download the screenshot to another device communicatively coupled thereto in response to a signal received from a user.

12. The hand-held display module of claim 10, wherein the circuit is configured to display an icon on the display indicating that a screenshot has been saved.

13. The hand-held-display module of claim 10, wherein the circuit is configured to display a vertical line on the display in a position based of the medial-lateral balance of the joint force that is indicated in a corresponding screenshot and an angled line on the display in a position based of the anterior-posterior balance of the joint force that is indicated in the corresponding screenshot.

14. The hand-held display module of claim 1, further comprising a mode button usable to select between a first mode and a second mode,

wherein when in the first mode, the circuit is configured to determine a joint force value indicative of the medial-lateral balance of the joint force based on the joint force data and display a visual indication on the display of the medial-lateral balance of the joint force based on the joint force value, and

wherein, when in the second mode, the circuit is configured to determine a joint force value indicative of the medial-lateral and the anterior-posterior balance of the joint force based on the joint force data and display a visual indication on the display of the medial-lateral and anterior posterior balance of the joint force based on the joint force value.

15. A hand-held display module comprising:

a display;

a receiver circuit configured to receive joint force data indicative of the joint force between a patient'"'"'s tibia and femur,

a processor coupled to the receiver circuit and the display; and

a memory device coupled to the processor and having stored therein a plurality of instructions, which when executed by the processor, cause the processor to;

determine a joint force value indicative of the medial-lateral balance of the joint force based on the joint force data, and

display an icon on the display in a position that provides a visual indication of the medial-lateral balance of the joint force.

16. The hand-held display module of claim 15, wherein the plurality of instructions further cause the processor to:

determine a medial force value indicative of a medial component of the joint force based on the joint force data,

determine a lateral force value indicative of a lateral component of the joint force based on the joint force data, and

display the medial force value and the lateral force value on the display.

17. The hand-held display module of claim 15, wherein the plurality of instructions further cause the processor to determine an average force value based on the medial force value and the lateral force value and display the average force value on the display.

18. The hand-held display module of claim 15, wherein the plurality of instructions cause the processor to:

determine a joint force value indicative of the medial-lateral balance and the anterior-posterior balance of the joint force, and

display the icon on the display in a position indicative of the medial-lateral and the anterior-posterior balance of the joint force based on the joint force value.

19. The hand-held display module of claim 16, wherein the plurality of instructions further cause the processor to display a bar on the display, the bar having a first end corresponding to a medial side and a second end corresponding to a lateral side, the first and second ends of the bar being displayed in a position based on the anterior-posterior balance of the joint force.

20. A hand-held display module comprising:

a display;

a receiver circuit configured to communicate with a sensor module positioned in a knee joint of a patient to receive joint force data indicative of the joint force of the patient'"'"'s knee joint; and

a control circuit coupled to the display and the receiver circuit, the control circuit being configured to (i) determine a medial force value indicative of a medial component of the joint force based on the joint force data, (ii) determine a lateral force value indicative of a lateral component of the joint force based on the joint force data, (iii) determine an average force value based on the medial force value and the lateral force value, and (iv) display the medial force value, the lateral force value, and the average force value on the display.