Coordinate mapping system for joint treatment

• US 9,351,746 B2
• Filed: 10/07/2014
• Issued: 05/31/2016
• Est. Priority Date: 11/20/2009
• Status: Active Grant

• Current Assignee: Zimmer Knee Creations, Inc. (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Zimmer Knee Creations, Inc. (Zimmer Biomet Holdings, Inc.)
• Inventors: Hanson, Shaun B., Mandeen, Christopher D., Russell, Thomas A.
• Primary Examiner(s): Yang, Andrew
• Application Number:
  US14/508,436
• Publication Number:
  US 20150025589A1
• Time in Patent Office: 602 Days
• US Class Current: 1/1
• CPC Class Codes: A61B 17/1764 for the knee
• CPC Class Codes: A61B 2017/3411 with a plurality of holes, e.g. holes in matrix arrangement
• CPC Class Codes: A61B 2090/3937 Visible markers
• CPC Class Codes: A61B 2090/3966 Radiopaque markers visible in an X-ray image
• CPC Class Codes: A61B 90/11 with guides for needles or instruments, e.g. arcuate slides or ball joints

Abstract

A coordinate mapping system is provided for locating a defect in a bone. The system comprises a positioning instrument for controlled delivery of a device to a target site, the instrument comprising a main body and a rail extending from the main body, the rail including a series of indicia corresponding to predefined grid lines, and a template configured to overlay an image of a bone having a defect at the target site, the template including a predefined grid for determining a set of coordinates to locate the target site using the positioning instrument. A method of accessing a target site near a defect in a bone using the radial coordinate mapping system is also provided.

Claims

1. A positioning instrument, comprising:

a main body including a first hub portion and a first elongate portion extending from the first hub portion;

a rail body including a second hub portion and a second elongate portion extending from the second hub portion, the rail body positioned along the main body such that a first hub portion center is aligned with a second hub portion center;

an alignment guide being detachable and movable along a length of the rail body, the alignment guide including at least one device portal configured to guide a device into a bone; and

a reference body including a third don ate ion having a first end and a second end and a base portion, wherein the base portion extends from the first end and the second end includes an open-ended slot configured to receive a portion of the main body such that the main body is detachable and moveable with respect to the reference body.

2. The positioning instrument of claim 1, wherein the first elongate portion of the main body includes at least one tool engaging hole for receiving a tool.

3. The positioning instrument of claim 1, wherein the first hub portion center and the second hub portion center each include a tool engaging hole for receiving a tool.

4. The positioning instrument of claim 1, wherein the alignment guide includes a slot configured to receive the second elongate portion of the rail body.

5. The positioning instrument of claim 1, wherein the at least one device portal defines a trajectory for controlled delivery of a device to a target site of a bone.

6. The positioning instrument of claim 1, further including:

at least one brace attachable to the first elongate portion of the main body, the at least one brace configured to secure the positioning instrument along a portion of a bone.

7. A positioning system for controlled delivery of a device to a target site of a bone, comprising:

a positioning instrument, including;

a main body including a first hub portion and a first elongate portion extending from the first hub portion;

a rail body including a second hub portion and a second elongate portion extending from the second hub portion, the rail body positioned along the main body such that a first hub portion center is aligned with a second hub portion center; and

an alignment guide being detachable and movable along a length of the rail body, the alignment guide including at least one device portal configured to guide a device into a bone; and

a template configured to overlay an image of the bone having a defect at the target site, the template including a predefined grid for determining a set of coordinates to locate the target site using the positioning instrument.

8. The positioning instrument of claim 7, further including:

a reference body including a third elongate portion and a base portion, wherein the base portion extends from a first end of the third elongate portion.

9. The positioning instrument of claim 8, wherein a second end of the third elongate portion includes an open-ended slot configured to receive a portion of the main body such that the main body is detachable and moveable with respect to the reference body.

10. The positioning system of claim 7, wherein the predefined grid includes a plurality of radial grid lines and a plurality of interval markings.

11. The positioning instrument of claim 10, wherein the second hub portion includes a first set of indicia configured to correspond to the plurality of radial grid lines and the second elongate portion includes a second set of indicia configured to correspond to the plurality of interval markings.

12. A method of accessing a target site near a defect in a bone,

comprising:

determining a set of coordinates of a location of the defect from a predefined grid;

providing a positioning instrument for controlled delivery of a device to the target site, the positioning instrument, including;

a main body including a first elongate portion and a first hub portion;

a rail body including a second elongate portion and a second hub portion, the rail body coupled to the main body such that a first hub portion center is aligned with a second hub portion center; and

an alignment guide being detachable and movable along a length of the rail body, the alignment guide including at least one device portal configured to guide a device into a bone;

arranging the rail body at an angle corresponding to a first coordinate of the set of coordinates;

arranging the alignment guide at a position along the rail body corresponding to a second coordinate of the set of coordinates; and

inserting a device through the at least one device portal to access the target site.

13. The method of claim 12 further including:

providing or obtaining a template having the predefined grid for determining the set of coordinates to locate the target site on the bone having the detect; and

overlaying the template on an image of the bone, the template being aligned with an anatomical landmark on the bone.

14. The method of claim 12, wherein the positioning instrument further includes:

a reference body including a third elongate portion and a base portion extending from a first end of the third elongate portion, wherein a second end of the third elongate portion includes an open-ended slot configured to receive a portion of the main body such that the main body is detachable and moveable with respect to the reference body.

15. The method of claim 14, further including:

positioning the reference body along the bone such that the reference body is aligned with a joint line of the bone;

moving the main body within the open-ended slot until the first hub portion center is at a predetermined distance from the joint line; and

securing the main body to the bone such that the first hub portion center is at the predetermined distance from the joint line.

16. The method of claim 12, wherein the predefined grid includes a plurality of radial grid lines and a plurality of interval markings, and wherein the first coordinate of the set of coordinates corresponds to a radial grid line and the second coordinate of the set of coordinates corresponds to an interval marking of the radial grid line.

17. The method of claim 16, wherein the second hub portion includes a first set of indicia corresponding to the plurality of radial grid lines and the second elongate portion includes a second set of indicia corresponding to the plurality of interval markings.

18. The method of claim 12, wherein the bone is at least one of a tibia and a femur, and wherein the anatomical landmark is at least one of a tubercle and a femoral shaft axis.