Title:
【発明の名称】じゅく状物の熱的除去装置
Document Type and Number:
Japanese Patent JPH04504373
Kind Code:
A
Abstract:
A thermal atherectomy catheter is provided with a heated temperature self regulating tip (1) for insertion in an artery to vaporize an atherosclerotic plaque obstruction particularly in coronary and peripheral arteries. The heater (101) is located at the distal end of the catheter and has a winding of fine wire (7) around a ferromagnetic core (2) with the wire being connected via a transmission line (20) to a high frequency constant alternating current source in the megahertz range. The catheter, which may or may not employ a guide wire, is inserted into and through the lumen of a vessel and guided usually with the assistance of fluoroscopy to the location of the stenosis. The heater (101) is energized to vaporize the plaque, the temperature not exceeding a desired temperature as determined by the Curie temperature of the ferromagnetic material.
Inventors:
Taylor, James M
Gay, Eric Elle
Cowell, Mark J.
Wort david ef
Gay, Eric Elle
Cowell, Mark J.
Wort david ef
Application Number:
JP50333391A
Publication Date:
August 06, 1992
Filing Date:
January 09, 1991
Export Citation:
Assignee:
Metcal Incorporated
International Classes:
A61B18/00; A61B18/08; A61B18/20; A61N5/06; A61B17/22; (IPC1-7): A61B17/36; A61N5/06
Attorney, Agent or Firm:
Kunihiko Ohashi (1 outside)