Reference position tool for the muscular-skeletal system and method therefor

• US 9,936,898 B2
• Filed: 09/13/2013
• Issued: 04/10/2018
• Est. Priority Date: 03/18/2013
• Status: Active Grant

• Current Assignee: Howmedica Osteonics Corp. (Stryker Corporation)
• Original Assignee: OrthoSensor, Inc (Stryker Corporation)
• Inventors: Stein, Marc, Roche, Martin
• Primary Examiner(s): WOODALL, NICHOLAS W
• Application Number:
  US14/027,124
• Publication Number:
  US 20140276886A1
• Time in Patent Office: 1,670 Days
• CPC Class Codes: A61B 17/154 for preparing bone for knee prosthesis
• CPC Class Codes: A61B 17/155 Cutting femur
• CPC Class Codes: A61B 17/157 Cutting tibia
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 2034/102 Modelling of surgical devices, implants or prosthesis
• CPC Class Codes: A61B 2034/104 Modelling the effect of the tool, e.g. the effect of an implanted prosthesis or for predicting the effect of ablation or burring
• CPC Class Codes: A61B 2034/105 Modelling of the patient, e.g. for ligaments or bones
• CPC Class Codes: A61B 34/10 Computer-aided planning, simulation or modelling of surgical operations
• CPC Class Codes: A61B 34/20 Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
• CPC Class Codes: A61B 34/25 User interfaces for surgical systems
• CPC Class Codes: A61B 5/103 Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes A61B5/08 takes precedence; measuring aids for tailors A41H1/00; measuring instruments specially adapted for dentistry A61C19/04
• CPC Class Codes: A61B 5/1036 Measuring load distribution, e.g. podologic studies
• CPC Class Codes: A61B 5/1072 measuring distances on the body, e.g. measuring length, height or thickness A61B5/1076 takes precedence
• CPC Class Codes: A61B 5/1121 Determining geometric values, e.g. centre of rotation or angular range of movement
• 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: A61B 5/4571 Evaluating the hip
• CPC Class Codes: A61B 5/4585 Evaluating the knee
• CPC Class Codes: A61B 5/4851 Prosthesis assessment or monitoring
• CPC Class Codes: A61B 5/4887 Locating particular structures in or on the body
• CPC Class Codes: A61B 5/686 : Permanently implanted devices, e.g. pacemakers, other stimulators, biochips A61B5/6861 takes precedence
• CPC Class Codes: A61B 90/37 : Surgical systems with images on a monitor during operation
• CPC Class Codes: A61F 2/38 : for elbows or knees
• CPC Class Codes: A61F 2/3836 : Special connection between upper and lower leg, e.g. constrained
• CPC Class Codes: A61F 2/461 : of knees
• 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 2002/4658 : for measuring dimensions, e.g. length
• CPC Class Codes: A61F 2002/4668 : for measuring angles
• CPC Class Codes: G06F 3/0481 : based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance

Abstract

An alignment system for the muscular-skeletal system is disclosed. The system supports parameter measurement and alignment. The system comprises a sensored device, a reference position tool, and a remote system configured to receive and display sensor data. The sensored device includes a three-axis accelerometer configured to measure position, rotation, and slope. The reference position tool comprises a body, a first arm coupled to a proximal end of the body, and a second arms coupled to a proximal end of the body. The sensored device couples to the reference position tool. The first and second arms of the reference position tool couples to the muscular-skeletal system in predetermined locations to allow a position of the muscular-skeletal system to be referenced. The body of the reference position tool can extend and retract to adapt to different sized muscular-skeletal systems.

Claims

1. A reference position tool comprising:

a body;

a first arm coupled to the body wherein the first arm is configured to couple to a proximal end portion of a first bone;

a second arm coupled to the body wherein the second arm is configured to couple to a distal end portion of the first bone; and

a prosthetic component including electronic circuitry coupled to one or more sensors, wherein the prosthetic component is configured to measure position, rotation, or slope, wherein the prosthetic component is configured as a measurement device to be held by a user against the first bone to measure a first reference position, wherein the electronic circuitry controls a measurement process and transmits measurement data, wherein the prosthetic component couples to the reference position tool as the measurement device and is configured to measure a second reference position, and wherein the prosthetic component is configured to be inserted in a joint of a musculoskeletal system.

2. The tool of claim 1 wherein the prosthetic component is configured to couple to the body of the reference position tool.

3. The tool of claim 1 wherein the first arm and the second arm respectively couple to a proximal portion of a tibia and a distal portion of the tibia.

4. The tool of claim 1 wherein a plurality of reference position tools are provided each having a different body length.

5. The tool of claim 1 wherein the body is configured to extend or retract to change a length of the reference position tool.

6. The tool of claim 1 further including a computer and display configured to receive measurement data transmitted from the prosthetic component.

7. The tool of claim 1 wherein the prosthetic component further includes a power source coupled to the electronic circuitry and at least one inertial sensor.

8. The tool of claim 7 wherein the inertial sensor is an accelerometer.

9. The tool of claim 1 wherein the prosthetic component is an insert.

10. The tool of claim 1 further including a shim wherein the shim couples to the prosthetic component, wherein a tab extends from the shim, and wherein the tab of the shim is configured to be inserted in a slot of the body of the reference position tool.

11. The tool of claim 1 wherein the first bone is placed in the second reference position, wherein a bone cutting jig is coupled to a second bone, and wherein a joint couples the first bone to the second to support movement.

12. The tool of claim 11 wherein the prosthetic component includes a retaining structure and wherein the retaining structure is configured to couple the prosthetic component to the bone cutting jig as a measurement device and not as the prosthesis.

13. The tool of claim 11 further including a shim wherein the shim couples to the prosthetic component, wherein a tab extends from the shim, and wherein the tab of the shim is configured to be inserted in a cutting slot of the bone cutting jig.

14. The tool of claim 13 wherein the prosthetic component is coupled to the bone cutting jig as a measurement device and not as a prosthesis and wherein the prosthetic component is configured to provide measurement data used to calculate alignment of the first bone to the second bone relative to a mechanical axis.

15. The tool of claim 11 wherein the prosthetic component is configured as a measurement device and not as a prosthesis, wherein the prosthetic component is configured to measure at least one position, rotation, or slope that is used to adjust a position of the second bone cutting jig and wherein at least one bone cut is made on the second bone.

16. The tool of claim 11 wherein the first bone is placed in the second reference position and wherein the prosthetic component is inserted in the joint as a prosthesis.

17. The tool of claim 16 wherein the prosthetic component as the prosthesis is configured to measure loading applied to a surface of the prosthetic component with a plurality of load sensors underlying the surface while in the joint.

18. The tool of claim 16 wherein the prosthetic component as the prosthesis is configured to measure an A-P (anterior-posterior) slope of a bone cut.

19. The tool of claim 16 wherein the prosthetic component as the prosthesis is configured to measure position of applied load.