STEREOTACTIC ACCESS DEVICES AND METHODS

• US 20130053867A1
• Filed: 08/22/2012
• Published: 02/28/2013
• Est. Priority Date: 08/22/2011
• Status: Active Grant

• Current Assignee: Visualase, Inc. (Medtronic Plc)
• Original Assignee: Visualase, Inc. (Medtronic Plc)
• Inventors: Gowda, Ashok, McNichols, Roger, Houssiere, Charles
• Granted Patent: US 9,237,931 B2
• Time in Patent Office: Days
• US Class Current: 606/130
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 2090/103 Cranial plugs for access to brain
• CPC Class Codes: A61B 2090/3983 Reference marker arrangements for use with image guided surgery
• CPC Class Codes: A61B 90/11 with guides for needles or instruments, e.g. arcuate slides or ball joints
• CPC Class Codes: A61B 90/14 Fixators for body parts, e.g. skull clamps; Constructional details of fixators, e.g. pins

Abstract

This invention is directed to devices and methods for stereotactic access, and particularly to a frameless stereotactic access device for accessing a body cavity and methods therefor. In general, a stereotactic device may include portions or features for fixing the device to a portion of a patient'"'"'s body, such as, for example, a skull, such that the device may be generally spatially fixed in relation to the patient'"'"'s body or part thereof. The stereotactic device may also generally include portions or features for guiding a medical device or other device at a particular trajectory in relation to the patient'"'"'s body or part thereof.

Claims

1. A stereotactic access device comprising:

a body having a plurality of mounting arms, each of said arms mounting a securing device at an end; and

a mounting guide having a guide channel, said mounting guide being retained in said body;

wherein said plurality of mounting arms forms a stable planar platform with an access space.

2. The stereotactic access device of claim 1, wherein said plurality of mounting arms comprise three arms.

3. The stereotactic access device of claim 1, wherein said securing device comprises a self-tapping screw.

4. The stereotactic access device of claim 3, wherein said self-tapping screw comprises a registerable fiducial.

5. The stereotactic access device of claim 2, wherein said three arms form a tripod.

6. The stereotactic access device of claim 1, wherein said mounting guide comprises a mounting ball.

7. The stereotactic access device of claim 6, further comprising a locking screw adapted to reversibly lock said mounting ball in an orientation relative to said body.

8. The stereotactic access device of claim 1, further comprising spacers at said ends of said arms.

9. A method for stereotactic access to a patient'"'"'s body comprising:

registering a patient'"'"'s body and at least one navigation tool in a space utilizing a detection modality;

inserting said navigation tool in a guide channel of a stereotactic access device having a plurality of mounting arms, a plurality of securing screws and a locking screw;

aligning said navigation tool relative to said patient'"'"'s body along a trajectory toward a target;

sliding said stereotactic access device along said trajectory toward said patient'"'"'s body;

securing said stereotactic access device to said patient'"'"'s body utilizing said securing screws and locking said guide channel in place utilizing said locking screw;

removing said navigation tool;

inserting a drill through said guide channel; and

accessing said patient'"'"'s body by drilling along said trajectory through said guide channel to form an access channel in said patient'"'"'s body.

10. The method of claim 9, further comprising placing a bone screw in said access channel.

11. The method of claim 9, further comprising utilizing navigation software to align said navigation tool.

12. The method of claim 9, wherein said access channel is through a skull.

13. The method of claim 9, further comprising inserting an adapter in said guide channel for said drill.

14. The method of claim 10, further comprising removing said stereotactic access device after placing said bone screw.

15. The method of claim 9, further comprising placing an introducer having a through-channel through said guide channel and into said access channel.

16. A system for stereotactic access to a body comprising:

a stereotactic access device comprising;

a body having a plurality of mounting arms, each of said arms mounting a securing device at an end; and

a mounting guide having a guide channel, said mounting guide being retained in said body;

wherein said plurality of mounting arms forms a stable planar platform with an access space; and

a bone screw having a threaded portion and a channel.

17. The system of claim 16, wherein said bone screw comprises an introducer adapted to be received in and through said guide channel.

18. The system of claim 17, further comprising a sealing cap on said introducer.

19. The system of claim 16, wherein said mounting guide comprises a mounting ball.

20. The system of claim 19, further comprising a locking screw adapted to reversibly lock said mounting ball in an orientation relative to said body.