Lumbar spinal disc trocar placement device

• US 5,314,432 A
• Filed: 08/05/1993
• Issued: 05/24/1994
• Est. Priority Date: 08/05/1993
• Status: Expired due to Fees

• Current Assignee: Kamaljit S. Paul
• Original Assignee: Kamaljit S. Paul
• Inventors: Paul, Kamaljit S.
• Primary Examiner(s): Pellegrino, Stephen C.
• Assistant Examiner(s): DAWSON, GLENN K
• Application Number:
  US08/102,201
• Time in Patent Office: 292 Days
• Field of Search: 606/130, 606/1, 606/96-98, 606/102, 606/104, 128/653.1-653.5, 128/DIG. 26, 604/116
• US Class Current: 606/130
• CPC Class Codes: A61B 2017/00261 Discectomy
• CPC Class Codes: A61B 2090/068 with a bubble level
• CPC Class Codes: A61B 90/11 with guides for needles or instruments, e.g. arcuate slides or ball joints
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers
• CPC Class Codes: Y10S 128/26 Cannula supporters

Abstract

This invention provides a stereotactic device which is adapted for placement of a medical probe in the performance of percutaneous lumbar discectomy in a human body. The stereotactic device is utilized in conjunction with a fluoroscope for alignment and placement of a trocar type probe into a herniated disc. Bubble gauges are employed to level the x-axis and y-axis of a trocar support, which orients and slidably guides the medical probe into the targeted herniated disc nucleus.

Claims

1. A stereotactic device adapted for fluoroscope-monitored alignment and placement of a medical probe for percutaneous lumbar discectomy in a human body comprising:

(a) an elongated base plate with a radiopaque reference line along a plate longitudinal axis;

(b) a trocar support means pivotally secured adjacent to one end of said base plate, a longitudinal x-axis of said support means being in plane alignment with the longitudinal radiopaque reference line along said base plate;

(c) leveling gauges integral to the trocar support means for leveling of the longitudinal x-axis and a y-axis of said trocar support means, said leveling gauges being pivotable with said trocar support means relative to aid elongated base plate; and

(d) endpiece means for trocar orientation and slidable guidance integral to and adjacent to a posterior end of said trocar support means.

2. A device in accordance with claim 1 wherein the base plate is flexible, and conforms to a surface contour when positioned on a human body.

3. A device in accordance with claim 1 wherein the base plate has a bottom surface with contact adhesive means.

4. A device in accordance with claim 1 wherein said base plate is a rigid structure which is attached to a surface of a flexible planar substrate means.

5. A device in accordance with claim 1 wherein the trocar support means has tightening means in combination with said leveling gauges for maintaining a leveled orientation.

6. A device in accordance with claim 1 wherein the endpiece means is selective over a trocar orientation range between about 40°

-55°

relative to the x-axis of said trocar support means.

7. A device in accordance with claim 1 wherein the endpiece means is a solid block with at least one trocar guiding conduit which traverses the endpiece downward at an angle of about 45°

relative to the x-axis of said trocar support means, and said guiding conduit is in a plane which includes said x-axis and is perpendicular relative to the x-y plane.

8. A device in accordance with claim 1 wherein the endpiece means is a solid block with at least two trocar guiding conduits which traverse the endpiece downward at an orientation angle in the range between about 40°

-55°

relative to the x-axis of said trocar support means, and said guiding conduits are in a plane which includes said x-axis and is perpendicular relative to the x-y plane.