Surgery – Instruments – Light application
Patent
1993-04-23
1994-09-06
Aschenbrenner, Peter A.
Surgery
Instruments
Light application
606 17, 606 7, A61B 1736
Patent
active
053444191
ABSTRACT:
An apparatus and method are disclosed for making a laser balloon catheter (10) having a diffusing tip (24) for propagating a uniform cylindrical pattern of laser energy. Included in the catheter are an elongated flexible tube (12) with an inflatable balloon (14) connected to the tube and means for inflating (16) and deflating (18) the balloon. A central channel (20) is disposed within the balloon and coupled to the tube. An optical fiber (22) with the diffusing tip at its distal end delivers laser radiation through the balloon to tissue to be treated. The method comprises the steps of etching the distal end of the optical fiber to form an etched portion thereof, cladding the etched portion with a medium which secures the optical fiber to the central channel, and microballoons which diffuse the laser radiation radially from the optical fiber, thereby substantially avoiding axial propagation and heating of blood forward of the optical fiber.
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patent: 5151096 (1992-09-01), Khoury
patent: 5193526 (1993-03-01), Daikuzono
patent: 5196005 (1993-03-01), Doiron et al.
patent: 5207669 (1993-05-01), Baker et al.
patent: 5219346 (1993-06-01), Wagnieres et al.
Aschenbrenner Peter A.
Wayne State University
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