Endarterectomy apparatus

• US 4,290,427 A
• Filed: 11/26/1979
• Issued: 09/22/1981
• Est. Priority Date: 11/26/1979
• Status: Expired due to Term

• Current Assignee: Thomas J. Fogarty
• Original Assignee: Thomas J. Fogarty
• Inventors: Chin, Albert K.
• Primary Examiner(s): Michell, Robert W.
• Assistant Examiner(s): Thaler, Michael H.
• Application Number:
  US06/097,206
• Time in Patent Office: 666 Days
• Field of Search: 128/305, 128/304, 128/754, 128/753, 128/751, 30/316, 30/280, 30/113.1
• US Class Current: 606/159
• CPC Class Codes: A61B 17/320016 Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes A61B10/0233, A61B17/29, A61B17/3207 take precedence
• CPC Class Codes: A61B 17/32075 Pullback cutting; combined forward and pullback cutting, e.g. with cutters at both sides of the plaque
• CPC Class Codes: A61B 2017/22038 with a guide wire
• CPC Class Codes: A61B 2017/320741 for stripping the intima or the internal plaque from a blood vessel, e.g. for endarterectomy

Abstract

A center-pull cutting annulus which is radially expansible is employed to achieve complete removal of arteriosclerotic material from occluded arteries.

Claims

1. In an endarterectomy instrument comprising an annular knife having a cutting adge at one end thereof, said knife being split longitudinally and having overlapped end portions to thereby enable said knife to be yieldingly compressible radially for insertion within an artery and to thereafter enable said knife to apply a substantially constant outwardly directed pressure against said artery as an arteriosclerotic occlusion is being excised, and having a wire carrier attached thereto whereby said knife may be moved along an occluded artery to excise said occlusion therefrom, said cutting edge being located at the end of the knife from which said wire carrier extends the provision of attachment means carried by said knife and positioned bodily within the axial confines and centrally of said knife for connecting said wire carrier thereto along substantially the longitudinal axis of said knife, said attachment means including a cutting edge to enable said means to cut through an occlusion being excised by said knife.

2. In an endarterectomy instrument comprising an annular knife having a cutting edge at one end thereof, said knife being split longitudinally and having overlapped end portions to thereby enable said knife to be yieldingly compressible radially for insertion within an artery and to thereafter enable said knife to apply a substantially constant outwardly directed pressure against said artery as an arteriosclerotic occlusion is being excised, and having a wire carrier attached thereto whereby said knife may be moved along an occluded artery to excise said occlusion therefrom, the provision of attachment means carried by said knife for connecting said wire carrier thereto along substantially the longitudinal axis of said knife, said attachment means comprising an inwardly directed radially disposed rib member attached to said annular knife and extending to sustantially the center of said knife, said rib member having a cutting edge formed on it at its leading end, said wire carrier being attached to said rib member whereby said wire carrier is adapted to apply a center-pulling force to said knife.

3. The endarterectomy instrument of claim 2, the cutting edge of said rib member being disposed in following relation to the cutting edge of said annular knife.

4. The endarterectomy instrument of claim 3, the cutting edges of said knife and rib member being angularly inclined upwardly and rearwardly from the bottom of long side of said annular knife and being disposed in general parallelism with each other.