Title:
VENOUS VALVE CUTTING BLADE AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2015/118603
Kind Code:
A1
Abstract:
The present invention is provided with: a guide (22) that extends to the front and rear along an axial center (T) and has a circular shape having a diameter that is smaller than the diameter of the lumen (3) of a venous valve (1); a connecting rod (24) that extends to the front from the front end of the guide; a tip-end cutter (30) that is connected to the front end of the connecting rod; and a flexible wire (26) that extends to the rear from the rear end of the guide. The tip-end cutter has, at the rear end, a rear end portion (32) that has a curved surface that is curved toward the rear. The rear end portion has four or more approximately triangular pyramid-shaped cutting blade cones (34) having spaces between each other in the circumferential direction of the axial center. The cutting blade cones each have an apex (42) that is oriented to the rear and use the outer peripheral surface (36) of the tip-end cutter as one of the side surfaces that is in contact with the apex, and sharp-edged blades (40a, 40b) are formed by the three sides that emanate from the apex. One of the three sides extends from the apex toward the axial center.
Inventors:
FURUYA TAKATOSHI (JP)
Application Number:
PCT/JP2014/052511
Publication Date:
August 13, 2015
Filing Date:
February 04, 2014
Export Citation:
Assignee:
FURUYA TAKATOSHI (JP)
NUMATA OPTICAL INSTR FACTORY (JP)
NUMATA OPTICAL INSTR FACTORY (JP)
International Classes:
A61B17/32
Domestic Patent References:
| WO1997016125A1 | 1997-05-09 |
Foreign References:
| JP3321165B2 | 2002-09-03 | |||
| US5047041A | 1991-09-10 | |||
| DE3717926A1 | 1988-12-08 |
Attorney, Agent or Firm:
HOTTA MINORU (JP)
Minoru Hotta (JP)
Minoru Hotta (JP)
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