MEDICAL DEVICE EXTRACTION TOOL

• US 20080097519A1
• Filed: 10/20/2006
• Published: 04/24/2008
• Est. Priority Date: 10/20/2006
• Status: Abandoned Application

• Current Assignee: Alfred E. Mann Foundation For Scientific Research
• Original Assignee: Alfred E. Mann Foundation For Scientific Research
• Inventors: Hillery, Edward, Calderon, Joseph L., Schulman, Joseph H.
• Application Number:
  US11/551,433
• Publication Number:
  US 20080097519A1
• Time in Patent Office: Days
• US Class Current: 606/205
• CPC Class Codes: A61B 17/0401 Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors A61B17/0642 takes precedence; fixation devices for tendons or ligaments A61F2/0811
• CPC Class Codes: A61B 2017/00796 Breast surgery

Abstract

A medical instrument, particularly a surgical instrument with a displaceable push/pull activation tube arranged on the proximal end of a hand manipulator, that also contains an inner tube for retaining a fixed jaw, for activating remote tool parts on the distal end, in which a force-limiting device limits the transmission of force to the remote tool parts from the hand manipulator via an extendable coil spring. The medical instrument optionally features a fiber scope to enable optical viewing to locate the implanted device for removal as well as a saline flush capability. The instrument has jaws that are cylindrical in shape to facilitate grasping an implanted cylindrical device.

Claims

1. A medical instrument comprising:

remote tool parts on a distal end of the medical instrument for grasping an implanted device for removal;

an activation tube displaceable along a line of displacement by an activation trigger arranged on a proximal end of said activation tube adapted to activate said remote tool parts at the distal end of said activation tube;

a force-limiting device comprising a coil spring coaxially arranged with said activation tube for limiting the transmission of force to the remote tool parts from said activation trigger.

2. The medical instrument according to claim 1, further comprising an optical imaging system comprised of lens, fiber optics and a light source.

3. The medical instrument according to claim 2, wherein said imaging system is arranged in a collinear orientation with said activation tube.

4. The medical instrument according to claim 1, wherein said remote tool parts are comprised of cylindrically shaped jaws to facilitate grasping an implanted device for removal.

5. The medical instrument according to claim 4, wherein said cylindrically shaped jaws have a radius of about 6 mm.

6. The medical instrument according to claim 1, wherein said remote tool parts are comprised of a fixed jaw and a jaw that is moveable by said activation tube.

7. The medical instrument according to claim 6, wherein said activation tube surrounds a fixed inner tube that is arranged collinearly with said activation tube and that is integral with said fixed jaw.

8. The medical instrument according to claim 1, wherein the spring-like elasticity of said coil spring can be adjusted through its shape and/or the number of the coils.

9. The medical instrument according to claim 1, wherein the elasticity of said coil spring can be adjusted via the material comprising said coil spring.

10. The medical instrument according to claim 1, wherein said activation tube and said coil spring are independently arranged.

11. The medical instrument according to claim 1, wherein said coil spring has a virtually constant cross section.

12. The medical instrument according to claim 1, further comprising a port and tube for saline flushing.

13. The medical instrument according to claim 1, wherein said remote tool parts are comprised of a fixed hook and a hook that is moveable by said activation tube.