Method for interstitial laser therapy

Details Method for interstitial laser therapy Method for interstitial laser therapy

1990-06-08

1992-12-08

Pellegrino, Stephen C.

Surgery

Instruments

Light application

606 14, 128398, 604 21, A61B 1732

Patent

active

051693968

ABSTRACT:
Apparatus and method for locally generating hyperthermia-induced coagulation necrosis in tissue masses located deeply within the body of a subject. High energy laser radiation is introduced into the target tissue mass using an optical fiber inserted into a metallic cannula through which a suitable fluid is coaxially flowed. A combination of the fluid flow and the slow withdrawal of the cannula/fiber combination during therapy protects the optical fiber tip, thereby preserving its energy transmission characteristics. After establishment of a small fluid bolus in front of the fiber tip, fluid flow which is approximately proportionate to the laser energy employed has been found to be most effective in this regard.

REFERENCES:
patent: 4222375 (1980-09-01), Martinez
patent: 4407282 (1983-10-01), Swartz
patent: 4773413 (1988-09-01), Hussein et al.
patent: 4819630 (1989-04-01), Dehart
patent: 4932934 (1990-06-01), Dougherty et al.
patent: 4957481 (1990-09-01), Gatenby
patent: 4959063 (1990-09-01), Kojima

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