Methods and systems for diagnosing, treating, or tracking spinal disorders

• US 8,685,093 B2
• Filed: 01/23/2009
• Issued: 04/01/2014
• Est. Priority Date: 01/23/2009
• Status: Active Grant

• Current Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Original Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Inventors: Anderson, Kent M., Morrison, Matthew M., Carls, Thomas, Lange, Eric C.
• Primary Examiner(s): Willse, David H
• Assistant Examiner(s): SHIPMON, TIFFANY P
• Application Number:
  US12/358,430
• Publication Number:
  US 20100191088A1
• Time in Patent Office: 1,894 Days
• Field of Search: 623/17.11, 600/317, 600/424
• US Class Current: 623/17.11
• CPC Class Codes: A61B 17/7074 Tools specially adapted for spinal fixation operations other than for bone removal or filler handling A61B17/7062, A61B17/808, A61B17/8858 take precedence; for spinal image producing devices A61B90/36, A61B34/20; markers A61B90/39
• CPC Class Codes: A61B 2017/564 Methods for bone or joint treatment
• CPC Class Codes: A61B 2034/105 Modelling of the patient, e.g. for ligaments or bones
• CPC Class Codes: A61B 2034/108 Computer aided selection or customisation of medical implants or cutting guides
• CPC Class Codes: A61B 2034/2051 Electromagnetic tracking systems
• CPC Class Codes: A61B 2090/0807 Indication means
• CPC Class Codes: A61B 2090/0812 indicating loosening or shifting of parts of an instrument, signaling maladjustment of parts
• 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 5/11 Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb for measuring pulse A61B5/02 ;A61B5/1038 takes precedence; motion detection to correct for motion artifacts in physiological signals A61B5/721
• CPC Class Codes: A61B 5/4504 Bones A61B5/4547 takes precedence
• CPC Class Codes: A61B 5/4514 Cartilage
• CPC Class Codes: A61B 5/4519 Muscles A61B5/389, A61B5/224 take precedence
• CPC Class Codes: A61B 5/686 Permanently implanted devices, e.g. pacemakers, other stimulators, biochips A61B5/6861 takes precedence

Abstract

Methods and systems for performing a surgical procedure using implantable sensors are disclosed. The method includes providing one or more implantable sensors, each sensor configured for implantation adjacent to an anatomical feature of a patient; imaging the patient to determine the relative positions of the one or more implantable sensors relative to the anatomical features of the patient; inserting an implant adjacent to at least one of the anatomical features; and tracking the position of the implant relative to the at least one anatomical feature during the inserting of the implant using the implantable sensors.

Claims

1. A method of performing a surgical procedure to treat a condition of a patient using implantable sensors, the method comprising:

providing one or more implantable sensors, each sensor configured for implantation adjacent to an anatomical feature of the patient;

inserting one or more of the implantable sensors into the patient adjacent to the anatomical feature using a minimally invasive procedure;

imaging the patient to determine the relative positions of the one or more implantable sensors relative to the anatomical features of the patient and to generate an image of the patient including at least an image of the anatomical feature and the implantable sensors;

generating a model of the patient including at least a model of the anatomical feature based on the generated image of the patient and the determined relative positions of the implantable sensors;

tracking the positions of the implantable sensors over time relative to the anatomical feature;

selecting an implant to treat the condition of the patient based on the tracking of the implantable sensors;

inserting the determined implant into the patient adjacent to the anatomical feature using a minimally invasive procedure, said implant including a sensor therein; and

tracking the position of the implant relative to the at least one anatomical feature and the position of the sensor within the implant relative to at least one of the implantable sensors during insertion of the implant using the implantable sensors and the generated image and model.

2. The method of claim 1, wherein at least one of the implantable sensors comprises a housing having a bone engaging portion.

3. The method of claim 1, wherein one or more of the implantable sensors inserted into the patient comprises an asymmetrical profile such that an orientation of the sensor with respect to the adjacent anatomical feature is detectable from the imaging.

4. The method of claim 1, wherein inserting the implant comprises grasping the implant with a surgical tool, the surgical tool including a sensor therein and wherein tracking the position of the implant comprises tracking the relative position of the sensor within the surgical tool to at least one of the implantable sensors.

5. The method of claim 4, wherein inserting one or more of the implantable sensors comprises positioning two or more sensors symmetrical about the anatomical feature.

6. The method of claim 1, wherein the one or more sensors include a housing having a bone engaging portion and an asymmetrical head portion;

and further comprising;

engaging the bone engaging portion of the housing with a vertebra;

imaging the patient to determine the relative position of the sensor relative to the vertebra using the asymmetrical head portion of the housing as a guide;

inserting an implant adjacent to the vertebra; and

tracking the position of the implant relative to the vertebra by correlating the relative position of the implant to the sensor to the vertebra.

7. The method of claim 1, wherein the implant is a bone screw having a head, a threaded shaft and a neck positioned between the head and the neck, the sensor within the implant being enclosed within the shaft of the screw.

8. A method of performing a surgical procedure to treat a condition of a patient using one or more sensors, the method comprising:

securing one or more sensors to the patient adjacent to an anatomical feature of the patient;

imaging the patient to determine the relative positions of the one or more sensors relative to the anatomical feature;

tracking the positions of the sensors over time relative to the anatomical feature;

selecting an implant to treat the condition of the patient based on the tracking of the sensors;

inserting an implant into the patient; and

tracking the position of the implant relative to the anatomical feature using the sensors.

9. The method of claim 8, wherein the implant is a fixation device.

10. The method of claim 8, wherein the tracking step comprises:

comparing the imaging of the patient to a previously planned procedure; and

positioning the implant at a previously planned location based on the comparison.

11. The method of claim 8, wherein one or more of the sensors is configured to identify from the imaging an orientation of the sensor with respect to the anatomical feature.

12. The method of claim 8, wherein the implant includes a sensor therein and wherein tracking the position of the implant comprises tracking the relative position of the sensor within the implant to at least one of the sensors.

13. The method of claim 8, wherein inserting the implant comprises grasping the implant with a surgical tool, the surgical tool including a sensor therein and wherein tracking the position of the implant comprises tracking the relative position of the sensor within the surgical tool to at least one of the sensors.

14. The method of claim 8, further comprising:

post operatively imaging the patient to determine the relative positions of the implant, the anatomical feature, and the sensors.

15. The method of claim 8, further comprising:

positioning the implant in a final position; and

removing the sensors after the implant is positioned in the final position.

16. The method of claim 8, further comprising:

providing on a display a real-time display of the sensors, anatomical features and implant.

17. A method of performing a surgical procedure to treat a condition of a patient using at least one sensor, the method comprising:

positioning the at least one sensor within a housing having a bone engaging portion, said sensor configured to identify an orientation of the sensor during imaging;

engaging the bone engaging portion of the housing with a vertebra of the patient;

imaging the patient to determine the relative position of the sensor relative to the vertebra using the orientation of the sensor;

tracking the positions of the sensor over time relative to the vertebra;

selecting an implant to treat the condition of the patient based on the tracking of the sensor;

inserting an implant adjacent to the vertebra; and

tracking the position of the implant relative to the vertebra by correlating the relative position of the implant to the sensor to the vertebra.

18. The method of claim 17, further comprising:

positioning another sensor within a housing having a bone engaging portion, said another sensor configured to identify an orientation of the another sensor during imaging;

engaging the bone engaging portion of the housing with another vertebra of the patient;

imaging the patient to determine a relative position of the vertebra to the another vertebra using the orientations of the sensors; and

using the relative position of the vertebra to the another vertebra during the insertion and tracking steps.

19. The method of claim 17, wherein the implant includes a sensor therein and wherein tracking the position of the implant comprises tracking the relative position of the sensor within the implant to at least one of the sensors.

20. The method of claim 17, wherein inserting the implant comprises grasping the implant with a surgical tool, the surgical tool including a sensor therein and wherein tracking the position of the implant comprises tracking the relative position of the sensor within the surgical tool to at least one of the sensors.