Method of using a laser catheter

Details Method of using a laser catheter Method of using a laser catheter

1988-05-04

1990-03-06

Cohen, Lee S.

Surgery

Instruments

Light application

128398, 606 7, 606 15, A61N 506

Patent

active

049056891

ABSTRACT:
A laser catheter for removing atherosclerotic plaque. The distal end of the laser catheter, in addition to including a distal port for dye injection and preferably a steerable or at least movable guide wire, includes a smoothly tapered forward face with a sapphire, ruby, diamond or the like window for directing a mid-infrared laser beam centripedally toward a targeted plaque structure. A mid-infrared laser beam, preferably a erbium YAG or HF laser, is conducted through the catheter to abate plaque. A second catheter, substantially identical to the first catheter can slidably disposed about the first catheter so as to provide a tiered laser catheter. Thus, the smaller catheter can target plaque in the most constricted regions of the vessel and can then be advanced into the smaller diameter region wile bringing the second, larger catheter into engagement with a larger diameter packed portion thereby enable the irradiation, and ablation of the same.

REFERENCES:
patent: 4341873 (1982-07-01), Robinson et al.
patent: 4449532 (1984-05-01), Story
patent: 4583539 (1986-04-01), Karlin et al.

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