HIP REPLACEMENT NAVIGATION SYSTEM AND METHOD

• US 20180193171A1
• Filed: 02/18/2016
• Published: 07/12/2018
• Est. Priority Date: 02/20/2015
• Status: Active Grant

• Current Assignee: Orthalign, Inc.
• Original Assignee: Orthalign, Inc.
• Inventors: van der Walt, Nicholas, Nielsen, Jonathan
• Granted Patent: US 11,020,245 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 17/1746 for the acetabulum
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/568 produced with shape and dimensions specific for an individual patient
• CPC Class Codes: A61B 2034/2048 using an accelerometer or inertia sensor
• CPC Class Codes: A61B 2034/2068 using pointers, e.g. pointers having reference marks for determining coordinates of body points
• CPC Class Codes: A61B 2090/061 for measuring dimensions, e.g. length
• CPC Class Codes: A61B 2090/067 for measuring angles
• CPC Class Codes: A61B 2090/0811 for the position of a particular part of an instrument with respect to the rest of the instrument, e.g. position of the anvil of a stapling instrument
• 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 90/30 Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure
• CPC Class Codes: A61F 2/34 Acetabular cups
• CPC Class Codes: A61F 2/3601 for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices non-prosthetic internal fixation devices for the femoral head or neck A61B17/74
• CPC Class Codes: A61F 2/4609 of acetabular cups
• 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: A61F 2002/4681 by applying mechanical shocks, e.g. by hammering

Abstract

A hip joint navigation system is provided that includes a base having at least one channel disposed therethrough for receiving a pin for mounting the base to the pelvis. A mount feature is disposed on a top surface. A registration jig is configured to couple with the base and to engage anatomical landmarks. In some aspects, a patient specific jig system for hip replacement is provided including an engagement surface formed to closely mate to acetabular bone contours of a specific patient and a registration feature configured to be in a pre-determined orientation relative to an acetabulum the patient when the jig is coupled with acetabular bone contours of the specific patient. In other aspects, methods of using the systems are provided.

Claims

1. A hip joint navigation system, comprising:

a jig comprising a fixation base configured to be secured to a pelvis of a patient, an optical component coupled to the jig and having at least one degree of freedom relative to the fixation base,

wherein the optical component is configured to project light toward a portion of a extremity of the patient,

wherein the optical component is configured to determine the orientation of the extremity pre-operatively and/or post-operatively.

2. The hip joint navigation system of claim 1, further comprising an inertial sensor coupled to the jig and having at least one degree of freedom relative to the fixation base.

3. The hip joint navigation system of claim 2, wherein the optical component and the inertial sensor are separate components.

4. The hip joint navigation system of claim 2, wherein the optical component and the inertial sensor are integrated into a single housing.

5. The hip joint navigation system of claim 2, wherein the inertial sensor is coupled to the jig to allow polyaxial movement between the inertial sensor and the fixation base.

6. The hip joint navigation system of claim 2, wherein the optical component is coupled to the jig to allow polyaxial movement between the optical sensor and the fixation base.

7. The hip joint navigation system of claim 6, wherein the optical component is rotatable about an axle in addition to the polyaxial movement.

8. The hip joint navigation system of claim 2, wherein the optical component is configured to be positioned independently of the inertial sensor.

9. The hip joint navigation system of claim 1, wherein the optical component is coupled to the jig to allow polyaxial movement between the optical sensor and the fixation base.

10. The hip joint navigation system of claim 9, wherein the optical component is rotatable about an axle in addition to the polyaxial movement.

11. The hip joint navigation system of claim 1, wherein the optical component comprises a laser.

12. The hip joint navigation system of claim 1, wherein the optical component is configured to move up and down in pitch to adjust the position of light along the extremity.

13. The hip joint navigation system of claim 1, wherein the optical component is configured to tilt toward and away from the pelvis to sweep light along the extremity.

14. The hip joint navigation system of claim 1, wherein the optical component is configured to swivel right and left to sweep light across the extremity.

15. The hip joint navigation system of claim 1, wherein the optical component is configured to roll to change the orientation of a plane relative to the extremity.

16. The hip joint navigation system of claim 1, further comprising a probe coupled to the jig.

17. A method of performing a hip joint replacement procedure, comprising:

placing an extremity of a patient in an extended position;

mounting an optical component to the pelvis adjacent to the hip joint;

projecting a light onto the extremity to illuminate a portion of the extremity away from the hip joint;

recording the position of incidence of the light;

replacing the hip joint, or a portion thereof, with an artificial hip joint;

projecting the light onto the extremity to confirm orientation of the femur relative to the pelvis.

30. The method of claim 17, further comprising coupling the optical component and an inertial measurement unit to a jig.

32. The method of claim 30, wherein the optical component and the inertial measurement unit are separate components.

18. (canceled)

19. (canceled)

20. (canceled)

21. (canceled)

22. (canceled)

23. (canceled)

24. (canceled)

25. (canceled)

26. (canceled)

27. (canceled)

28. (canceled)

29. (canceled)

31. (canceled)

33. (canceled)

34. (canceled)

35. (canceled)

36. A method of performing a hip joint replacement procedure, comprising:

mounting an optical component to the pelvis adjacent to the hip joint;

registering a portion of the proximal femur adjacent to the hip joint;

projecting light from the optical component onto the extremity to confirm correspondence between pre-operative orientation of the femur and pelvis and the post-operative orientation of the femur and pelvis; and

registering the portion of the proximal femur adjacent to the hip joint to confirm post-operative leg length and/or joint off-set.

37-110. -110. (canceled)