Interventional medicine apparatus

• US 5,690,108 A
• Filed: 02/21/1997
• Issued: 11/25/1997
• Est. Priority Date: 11/28/1994
• Status: Expired due to Fees

• Current Assignee: Ohio State University
• Original Assignee: Donald W. Chakeres
• Inventors: Chakeres, Donald W.
• Primary Examiner(s): Lateef, Marvin M.
• Assistant Examiner(s): Casler, Brian L.
• Application Number:
  US08/804,062
• Time in Patent Office: 277 Days
• Field of Search: 128/653.1, 128/653.2, 128/653.5, 128/662.05, 606/130, 604/116, 378/20, 378/68, 378/162, 378/163, 378/177, 378/195, 378/204, 378/205
• US Class Current: 600/424
• CPC Class Codes: A61B 17/3403 Needle locating or guiding means guides for suture needles A61B17/0482; guiding or tracking by nuclear magnetic resonance G01R33/285
• CPC Class Codes: A61B 2090/363 Use of fiducial points
• CPC Class Codes: A61B 6/0442 made of non-metallic materials
• CPC Class Codes: A61B 6/548 Remote control of the apparatus or devices
• CPC Class Codes: A61B 90/11 with guides for needles or instruments, e.g. arcuate slides or ball joints

Abstract

Apparatus for assisting in the manual location, vectoring, and insertion of a medical instrument relative to a patient'"'"'s body using medical imaging equipment providing a cross-sectional imaging plane and a monitor which displays a distance calibrated cross-section imaged at the equipment imaging plane of the patient and an apparatus reference pattern. The displayed image sets forth the actual distance and angular orientation between the image plane and a reference axis of the device pattern to physically define a point on the pattern that corresponds to a point on the image.

Claims

1. Apparatus for utilization in a medical procedure that also involves the use of medical imaging equipment having a cross-sectional imaging plane and a monitor which displays a patient cross-sectional image currently being taken at the equipment cross-sectional imaging plane, and comprising:

an apparatus base member adapted to be placed in a position that is stationary relative to a patient'"'"'s body target of interest and that intersects the medical imaging equipment cross-sectional imaging plane;

an apparatus frame member being supported by and rotatable about a substantially vertical axis relative to said apparatus base member;

a reference pattern carried by said apparatus frame member, having a principal axis and having pattern elements comprised of a material and size for placement and imaging at the medical imaging equipment cross-sectional imaging plane and visibly displayed in cross-section on the medical imaging equipment monitor to provide linear measurements proportionally indicating on the medical imaging equipment monitor an angular position and separation distance of said reference pattern principal axis relative to the medical imaging equipment cross-sectional imaging plane;

a graduated angular position scale affixed to one of said apparatus base member and said apparatus frame member; and

a position indicator element co-operating with said graduated angular position scale and affixed to the other of said apparatus base member and said apparatus frame member to indicate an angular position of said frame member.

2. The apparatus defined by claim 1 wherein said reference pattern has an interior area through which at least portions of a medical instrument may be passed, said reference pattern interior area being defined in part by portions of said reference pattern elements.

3. The apparatus defined by claim 2 wherein said reference pattern elements are integral with said apparatus frame member.

4. The apparatus defined by claim 1 further comprising a graduated linear distance position scale.

5. The apparatus defined by claim 1 wherein said reference pattern elements are configured in a double-X pattern that is centered with respect to said reference pattern principal axis, said double-X configured pattern elements when imaged comprising one spaced-apart pair of unified elements displayed on the medical imaging equipment monitor when said reference pattern principal axis is contained within the medical equipment cross-sectional imaging plane.

6. The apparatus defined by claim 1 wherein said reference pattern elements are configured in a double-X pattern that is centered with respect to the reference pattern principal axis, when imaged said double-X configured pattern elements forming two spaced-apart pairs of spaced-apart elements displayed on the medical imaging equipment monitor when said reference pattern principal axis is positioned away from the medical imaging equipment cross-sectional imaging plane.

7. The apparatus defined by claim 6 wherein said reference pattern elements include pattern elements which intersect each other at an angle of approximately fifty-three degrees.

8. The apparatus defined by claim 6 wherein said two spaced-apart pairs of spaced-apart element sectional images are each comprised of equally spaced-apart elements, when imaged said equally spaced-apart elements appearing on the medical imaging equipment monitor when said reference pattern principal axis is contained in a plane that is parallel to the medical imaging equipment cross-sectional imaging plane.

9. The apparatus defined by claim 8 wherein the displayed linear measurements of one of said spaced-apart pairs of spaced-apart elements describe the distance between said reference pattern principal axis and said medical imaging equipment cross-sectional imaging plane.

10. The apparatus defined by claim 8 and further comprising a medical instrument guide support track carried by and movable with respect to said apparatus frame element and having a longitudinal guide and two points which prescribe the orientation of a reference longitudinal straight line, said guide support track being positioned on said apparatus frame element in a manner whereby said reference longitudinal straight line is separated from said medical imaging equipment cross-sectional imaging plane by either of the equal distances indicated by said equally spaced-apart pattern element sectional image displayed on the medical imaging equipment monitor.

11. The apparatus defined by claim 6 wherein said two spaced-apart pairs of spaced-apart elements are each comprised of differently spaced-apart elements when imaged said pairs of differently spaced-apart elements appearing on the medical imaging equipment monitor when said reference pattern principal axis is positioned angularly with respect to the medical imaging equipment cross-sectional imaging plane.

12. The apparatus defined by claim 11 wherein the numerical difference between the displayed linear measurements of said spaced-apart pairs of spaced-apart elements describe the angularity on said graduated angular position scale between said reference pattern principal axis and said medical imaging equipment cross-sectional imaging plane.