DEVICE FOR IMMOBILIZING A PRIMARY INSTRUMENT AND METHOD THEREFOR

• US 20070250075A1
• Filed: 06/25/2007
• Published: 10/25/2007
• Est. Priority Date: 04/07/2000
• Status: Active Grant

• Current Assignee: Mayo Foundation For Medical Education And Research (Mayo Clinic), Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Mayo Foundation For Medical Education And Research (Mayo Clinic), Image-Guided Neurologics Inc (Medtronic Plc)
• Inventors: Wharen, Robert, Parmer, Kari, Hatcher, David, Murdock, Frank, David, John, Miller, Thomas, Mazzocchi, Rudy, Solar, Matthew, Skakoon, James, Truwit, Charles, Parmer, Timothy
• Granted Patent: US 7,815,651 B2
• Time in Patent Office: Days
• US Class Current: 606/130
• CPC Class Codes: A61B 2017/0023 disposable
• CPC Class Codes: A61B 2017/00398 using powered actuators, e.g. stepper motors, solenoids
• CPC Class Codes: A61B 2017/00911 for fields applied by a magnetic resonance imaging system
• CPC Class Codes: A61B 2017/3407 including a base for support on the body
• CPC Class Codes: A61B 2017/3409 including needle or instrument drives
• CPC Class Codes: A61B 2017/3411 with a plurality of holes, e.g. holes in matrix arrangement
• CPC Class Codes: A61B 2017/347 Locking means, e.g. for locking instrument in cannula
• CPC Class Codes: A61B 2034/2051 Electromagnetic tracking systems
• CPC Class Codes: A61B 2034/2055 Optical tracking systems
• CPC Class Codes: A61B 2090/103 Cranial plugs for access to brain
• CPC Class Codes: A61B 2090/363 Use of fiducial points
• CPC Class Codes: A61B 2090/374 NMR or MRI
• CPC Class Codes: A61B 2090/3762 using computed tomography systems [CT]
• CPC Class Codes: A61B 2090/3983 Reference marker arrangements for use with image guided surgery
• 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 90/11 with guides for needles or instruments, e.g. arcuate slides or ball joints
• CPC Class Codes: A61N 1/0534 Electrodes for deep brain stimulation
• CPC Class Codes: A61N 1/0539 Anchoring of brain electrode systems, e.g. within burr hole

Abstract

Devices and methods provide accurate targeting, placement, and/or stabilization of an electrode or other instrument(s) into the brain or other body organ, such as to treat severe tremor or other neurological disorders. Targeting is performed using any form of image-guidance, including real-time MRI, CT, or frameless surgical navigation systems.

Claims

1. A device for immobilizing a primary instrument, comprising:

a base;

a stabilizer configured to engage the instrument, the stabilizer being configured to rest on the base and including at least one variable opening sized and shaped to at least partially surround the instrument and allow passage of the instrument when normally relaxed and to immobilize the instrument when compressed inwardly toward the instrument; and

a plate that is relatively more rigid than the stabilizer, the plate being configured to rest on the stabilizer and comprising a feature complementary to the normally relaxed size and shape of each variable opening of the stabilizer, yet shaped and sized to compress the at least one variable opening inwardly upon compression of the plate and the stabilizer together.

2. The device of claim 1, wherein the stabilizer includes a protuberance around the at least one variable opening.

3. The device of claim 1, wherein the feature of the plate includes a receptacle around an opening corresponding to each variable opening of the stabilizer.

4. The device of claim 1, comprising:

a protuberance around the at least one variable opening of the stabilizer; and

a receptacle around an opening of the feature of the plate corresponding to each variable opening of the stabilizer, wherein, upon compression of the plate and the stabilizer together, the protuberance is configured to compress within the receptacle to compress each such variable opening inwardly.

5. The device of claim 1, wherein the base is generally ring-shaped.

6. The device of claim 1, wherein the stabilizer includes at least two variable openings, and the plate includes at least two openings corresponding to the variable openings of the stabilizer.

7. The device of claim 1, wherein the at least one variable opening of the stabilizer is configured to accept at least a portion of the primary instrument therein and grip the primary instrument upon inward compression of the at least one variable opening.

8. The device of claim 1, wherein the device is configured to be used in combination with an adjustable trajectory access device configured to guide the instrument along a trajectory through an entry portal.

9. The device of claim 8, wherein the device is configured to be attached to the access device.

10. A method, comprising:

securing an immobilizing device around an entry portal in a surface;

passing an instrument at least partially through a variable opening in the immobilizing device; and

inwardly compressing the variable opening toward the instrument to immobilize the instrument.

11. The method of claim 10, wherein inwardly compressing the variable opening includes compressing a stabilizer of the immobilizing device, the stabilizer including the variable opening.

12. The method of claim 11, wherein inwardly compressing the variable opening includes compressing a plate and the stabilizer of the immobilizing device together, the plate including a feature complementary to a normally relaxed size and shape of the variable opening of the stabilizer, yet shaped and sized to compress the variable opening inwardly upon compression of the plate and the stabilizer together.

13. The method of claim 10, comprising attaching the immobilizing device to an adjustable trajectory access device.

14. The method of claim 13, comprising guiding the instrument along a trajectory through the entry portal in the surface with the adjustable trajectory access device.

15. A device for immobilizing a primary instrument, comprising:

means for securing the device around an entry portal in a surface; and

means for varying an opening in the device to at least partially surround the instrument and allow passage of the instrument when the opening is normally relaxed and to immobilize the instrument when the opening is compressed inwardly toward the instrument.

16. The device of claim 15, comprising means for attaching the device to an adjustable trajectory access device.

17. The device of claim 15, comprising means for guiding the instrument along a trajectory through the entry portal in the surface.