Laser catheter

Details Laser catheter Laser catheter

1987-06-25

1989-08-08

Cohen, Lee S.

Surgery

Truss

Pad

128398, 12830311, A61B 1736

Patent

active

048543152

ABSTRACT:
A laser catheter for removing athereosclerotic 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 while bringing the second, larger catheter into engagement with a larger diameter packed portion thereby enable the irradiation, and ablation of the same.

REFERENCES:
patent: 4233493 (1980-11-01), Nath
patent: 4266548 (1981-05-01), Davi
patent: 4341873 (1982-07-01), Robinson et al.
patent: 4343638 (1982-08-01), Mitachi et al.
patent: 4449532 (1984-05-01), Storz
patent: 4559942 (1985-12-01), Eisenberg
patent: 4583526 (1986-04-01), Ali
patent: 4583539 (1986-04-01), Karlin et al.
patent: 4616901 (1986-10-01), MacChesney
patent: 4681104 (1987-07-01), Edelman
"The Potential of an Infrared Hydrogen Fluoride (HF) Laser (3.0 .mu.m) for Corneal Surgery" by Seiler et al; Lasers in Ophthal. vol. 1, No. 1, pp. 44-60, (1986).

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