SYSTEM AND METHOD FOR SHORT RANGE TELEMETRY TO MEASURE A PARAMETER OF THE MUSCULAR-SKELETAL SYSTEM

• US 20100331633A1
• Filed: 06/29/2010
• Published: 12/30/2010
• Est. Priority Date: 06/30/2009
• Status: Abandoned Application

• Current Assignee: OrthoSensor, Inc (Stryker Corporation)
• Original Assignee: OrthoSensor, Inc (Stryker Corporation)
• Inventors: Stein, Marc
• Application Number:
  US12/825,661
• Publication Number:
  US 20100331633A1
• Time in Patent Office: Days
• US Class Current: 600/302
• CPC Class Codes: A61B 5/4509 Bone density determination
• CPC Class Codes: A61B 5/4528 Joints A61B5/4533, A61B5/4538 take precedence
• CPC Class Codes: A61B 5/6846 specially adapted to be brought in contact with an internal body part, i.e. invasive
• CPC Class Codes: A61B 5/6878 Bone
• CPC Class Codes: A61B 5/7239 using differentiation including higher order derivatives
• CPC Class Codes: A61B 8/15 Transmission-tomography

Abstract

A sensing insert device (100) is disclosed for measuring a parameter of the muscular-skeletal system. The sensing insert device (100) can be temporary or permanent. Used intra-operatively, the sensing insert device (100) comprises an insert dock 202 and a sensing module 200. The sensing module (200) is a self-contained encapsulated measurement device having at least one contacting surface that couples to the muscular-skeletal system. The sensing module (200) comprises one or more sensors (303), electronic circuitry (307), and communication circuitry (320). The electronic circuitry (307) operatively couples to the one or more sensors (303) to measure the parameter. The communication circuitry (320) couples to the electronic circuitry (307) to wirelessly transmit measurement data. The sensing module (200) wirelessly sends one or more data packets where each data packet comprises sensor data and a priority level. The data packet can further include a cyclic redundancy check.

Claims

1. A system to measure a parameter of the muscular-skeletal system comprising:

a sensing module comprising;

a substrate having a contacting surface for coupling to at least one bone of the muscular-skeletal system;

one or more sensors coupled to the substrate; and

electronic circuitry operatively coupled to the sensors; and

a transmitter coupled to the electronic circuitry where the sensor module wirelessly sends one or more data packets and where each data packet comprises measured parameter data and a priority level.

2. The system of claim 1 where the sensing module is operatively fitted within an orthopedic prosthesis such that the contacting surface couples to the at least one bone.

3. The system of claim 2 where the sensing module is fitted within a final insert having at least one bearing surface.

4. The system of claim 3 where the sensing module is placed in a trial insert and where the trial insert is substantial equal in dimensions to the final insert.

5. The system of claim 1 where the sensing module evaluates data bounds of the measured parameter and where a priority level is assigned corresponding to the data bounds.

6. The system of claim 5 where a communication mode is based on priority level and operating mode.

7. The system of claim 6 where an operating mode includes one or more power saving modes.

8. The system of claim 6 where the priority level corresponds to when the one or more data packets are transmitted.

9. The system of claim 1 where each data packet includes a cyclic redundancy check.

10. The system of claim 1 where the one or more sensors measures a transit time, frequency, or phase.

11. A method of transmitting measurement data from an orthopedic component comprising the steps of:

measuring a parameter of the muscular-skeletal system with a sensing module coupled to the muscular-skeletal system;

evaluating sensor data bounds; and

assigning priority level based on the data bounds and measured parameter data.

12. The method of claim 11 further including the steps of:

generating packet data where the packet data comprises measured parameter data and the priority level; and

sending one or more data packets to a receiver where the transmission can be immediate or delayed based on the priority level.

13. The method of claim 12 further including the steps of:

assessing an operating mode where the operating mode comprises one or more power saving modes; and

determining a communication mode based on the priority level and the operating mode.

14. The method of claim 13 further including the step of applying a cyclic redundancy check.

15. The method of claim 14 further including a step of measuring a force, pressure, or load applied by the muscular-skeletal system.

16. A prosthetic component to measure a parameter of the muscular-skeletal system comprising:

an insert having at least one bearing surface that allows articulation with at least one bone of the muscular-skeletal system where the insert includes;

a sensing module comprising;

one or more sensors; and

electronic circuitry operatively coupled to the sensors; and

a transmitter coupled to the electronic circuitry where the sensor module wirelessly sends one or more data packets and where each data packet comprises measured parameter data and a priority level.

17. The prosthetic component of claim 16 where the insert comprises a dock having an opening where the sensing module is inserted in the opening and where the insert is a trial insert for providing measurement data to optimally install one or more prosthetic components.

18. The prosthetic component of claim 16 where the sensing module evaluates data bounds and where a priority level is assigned corresponding to the data bounds and a parameter measurement.

19. The prosthetic component of claim 18 where a communication mode is based on priority level and operating mode, where an operating mode includes one or more power saving modes and where the communication mode corresponds to when the one or more data packets are transmitted.

20. The prosthetic component of claim 19 where each data packet includes a cyclic redundancy check.