Sensored head for a measurement tool for the muscular-skeletal system

• US 9,414,940 B2
• Filed: 09/23/2011
• Issued: 08/16/2016
• Est. Priority Date: 09/23/2011
• Status: Active Grant

• Current Assignee: Howmedica Osteonics Corp. (Stryker Corporation)
• Original Assignee: OrthoSensor, Inc (Stryker Corporation)
• Inventors: Stein, Marc, Chase, Andrew U.
• Primary Examiner(s): Henson, Devin
• Application Number:
  US13/243,082
• Publication Number:
  US 20130079793A1
• Time in Patent Office: 1,789 Days
• Field of Search: 600/587, 600/594, 600/595, 606/53, 606/57, 606/60, 606/102, 606/246, 606/263, 606/267, 606279-282
• US Class Current: 1/1
• CPC Class Codes: A61B 2034/2048 using an accelerometer or inertia sensor
• CPC Class Codes: A61B 2090/064 for measuring force, pressure or mechanical tension
• CPC Class Codes: A61B 2090/065 for measuring contact or contact pressure
• CPC Class Codes: A61B 5/45 For evaluating or diagnosing the musculoskeletal system or teeth A61B5/1036, A61B5/1074, A61B7/006 take precedence
• CPC Class Codes: A61B 5/4528 Joints A61B5/4533, A61B5/4538 take precedence
• CPC Class Codes: A61F 2/44 for the spine, e.g. vertebrae, spinal discs
• CPC Class Codes: A61F 2/4657 Measuring instruments used for implanting artificial joints for surgical instruments A61B90/06
• CPC Class Codes: A61F 2/4684 Trial or dummy prostheses
• CPC Class Codes: A61F 2002/4666 for measuring force, pressure or mechanical tension

Abstract

A measurement tool for measuring a parameter of the muscular-skeletal system is disclosed. The measurement tool includes a sensored head that comprises a first support structure, a second support structure, and a plurality of sensors for measuring load and position of load. The housing for the measurement tool includes a first housing component and a second housing component. The first housing component comprises a handle portion, a shaft portion, and a first support structure. Similarly, the second housing component comprises a handle portion, a shaft portion, and a second support structure. The sensored head includes an interconnect, a sensor guide, sensors, and a load plate. The interconnect and the sensor guide are aligned and retained in the first support structure by a sidewall.

Claims

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

a sensored head comprising;

a first support structure;

a second support structure;

an interconnect coupled to an interior surface of the first support structure; and

a plurality of sensors coupled between an interior surface of the first support structure and an interior surface of the second support structure; and

an electronic assembly, where the electronic assembly is in a handle operatively attached to the first and second support structures, where the electronic assembly is configured to send data from at least one of the plurality of sensors to a processor, where the handle includes a second sensor, where the second sensor is configured to measure trajectory, location and position of the sensored head in real-time while the sensored head is moved toward and within the muscular skeletal system.

2. The tool of claim 1 further including a gap between peripheral mating surfaces of the first and second support structures allowing compression of the sensored head.

3. The tool of claim 2 where the gap between the peripheral mating surfaces is filled with an elastic adhesive for coupling the first support structure to the second support structure.

4. The tool of claim 1 where the first support structure includes a sidewall to align and position the interconnect.

5. The tool of claim 4 further including a sensor guide overlying the interconnect where the sidewall of the first support structure aligns and positions the sensor guide to the interconnect.

6. The tool of claim 5 where the sensor guide includes a plurality of openings for exposing the interconnect.

7. The tool of claim 1 further including a load plate coupled between the plurality of sensors and the interior surface of the second support structure.

8. The tool of claim 1 where an exterior surface of the first support structure is convex and an exterior surface of the second support structure is convex.

9. The tool of claim 8 where the electronic assembly is operatively coupled to the plurality of sensors.

10. The tool of claim 9 further including a shaft coupled between the handle and the sensored head.

11. A measurement tool for measuring a parameter of the muscular-skeletal system comprising:

a sensored head including;

a first support structure having a peripheral surface;

a second support structure having a peripheral surface; and

a plurality of sensors coupled between interior surfaces of the first and second support structures where the peripheral surfaces of the first and second support structures are coupled together and where a gap separates the peripheral surfaces allowing compression of the sensored head; and

an electronic assembly, where the electronic assembly is in a handle operatively attached to the first and second support structures, where the electronic assembly is configured to send data from at least one of the plurality of sensors to a processor, where the handle includes a second sensor, where the second sensor is configured to measure trajectory, location and position of the sensored head in real-time while the sensored head is moved toward and within the muscular skeletal system.

12. The measurement tool of claim 11 further including an elastic adhesive coupled to the peripheral surfaces of the first and second support structure.

13. The measurement tool of claim 12 where the sensored head measures load magnitude and position of load.

14. The measurement tool of claim 13 where the plurality of sensors are polymer sensors.

15. The measurement tool of claim 13 where the second sensor is an accelerometer coupled to the electronic assembly.

16. The measurement tool of claim 15 further including a sensor guide overlying a portion of an interconnect where the first support structure includes a sidewall to align and position the sensor guide and where the sensor guide includes a plurality of openings for receiving the plurality of sensors.

17. The measurement tool of claim 16 further including a load plate coupled between the plurality of sensors and the interior surface of the second support structure.

18. The measurement tool of claim 17 further including a shaft coupled between the handle and the sensored head.

19. The measurement tool of claim 18 where the handle, shaft, first support structure, and a second support structure comprise polycarbonate.