WIRELESS SENSING MODULE FOR SENSING A PARAMETER OF THE MUSCULAR-SKELETAL SYSTEM

• US 20100331736A1
• 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:
  US12/825,724
• Publication Number:
  US 20100331736A1
• Time in Patent Office: Days
• US Class Current: 600/587
• 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 a 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 communication circuitry (320) comprises a data packetizer (422), a cyclic redundancy check circuit (413), a transmitter (416), a matching network (414), and an antenna (412). The sensing insert device (100) when inserted allows movement of the muscular-skeletal system.

Claims

1. A sensing system for measurement of a parameter of the muscular-skeletal system comprising:

a sensing module comprising;

one or more sensors;

electronic circuitry operatively coupled to the sensors; and

communication circuitry coupled to the electronic circuitry to transmit data from the one or more sensors comprising;

a data packetizer coupled to the electronic circuitry;

a cyclic redundancy check circuit coupled to the data packetizer;

a transmitter coupled to the cyclic redundancy check circuit.

2. The sensing system of claim 1 further including a receiving circuit external to the sensing module to receive data from the one or more sensors comprising:

an antenna;

a matching network coupled to the antenna;

a receiver coupled to the matching network;

a cyclic redundancy check circuit coupled to the receiver; and

a data packetizer coupled to the cyclic redundancy check circuit

3. The sensing system of claim 1 where the sensing module further includes an encapsulated enclosure having a power source therein.

4. The sensing system of claim 3 where the communication circuitry further comprises:

a matching network coupled to the transmitter; and

an antenna coupled to the matching network where the antenna is within the encapsulated enclosure.

5. The sensing system of claim 3 where the enclosure includes a surface for receiving the applied parameter, where the one or more sensors underlie the surface, and where the electronic circuitry underlies the one or more sensors.

6. The sensing system of claim 5 where the sensing module is in a trial insert.

7. The sensing system of claim 5 where the sensing module is in a final insert having at least one bearing surface to promote movement of the muscular-skeletal system.

8. The sensing system of claim 1 where the electronic circuitry and the communication circuitry are on a single application integrated circuit to reduce the form factor and power consumption the sensor module.

9. The sensing system of claim 1 where the transmission range of the transmitter is 5 meters or less.

10. The sensing system of claim 1 where the sensing module is transmit only to prevent device tampering.

11. The sensing system of claim 1 where a cyclic redundancy check is performed on a transmission.

12. A prosthetic component for measuring a parameter of the muscular-skeletal system comprising:

a trial insert comprising;

a contacting surface;

one or more sensors coupled to the contacting surface;

electronic circuitry operatively coupled to the sensors; and

communication circuitry coupled to the contacting surface to transmit data from the one or more sensors comprising;

a data packetizer coupled to the electronic circuitry;

a cyclic redundancy check circuit coupled to the data packetizer;

a transmitter coupled to the cyclic redundancy check circuit.

13. The prosthetic component of claim 12 where the trial insert further comprises:

a dock having a cavity; and

a sensing module having the contacting surface where the one or more sensors, electronic circuitry, and communication circuitry reside in the sensing module and where the sensing module is placed in the cavity.

14. The prosthetic component of claim 13 where the sensing module further comprises:

a matching network coupled to the transmitter; and

an antenna coupled to the matching network.

15. The prosthetic component of claim 12 where the trial insert has substantially equal dimensions to the final insert.

16. The prosthetic component of claim 12 where the one or more sensors are coupled between the contacting surface and a rigid substrate and where the communication circuitry underlies the rigid substrate.

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

a final insert having a bearing surface;

a sensing module within the final surface comprising;

a contacting surface coupled to the bearing surface;

one or more sensors coupled to the contacting surface;

electronic circuitry operatively coupled to the sensors; and

communication circuitry coupled to the electronic circuitry to transmit data from the one or more sensors comprising;

a data packetizer coupled to the electronic circuitry;

a cyclic redundancy check circuit coupled to the data packetizer;

a transmitter coupled to the cyclic redundancy check circuit.

18. The prosthetic component of claim 17 where the sensing module further includes:

a matching network coupled to the transmitter; and

an antenna coupled to the matching network.

19. The prosthetic component of claim 17, where the sensing module is hermetically sealed.

20. The prosthetic component of claim 17, where the one or more sensors are coupled between the contacting surface and a rigid substrate and where the communication circuitry underlies the rigid substrate.