Method for interstitial laser therapy
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United States of America Patent
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Dec 8, 1992
Grant Date -
N/A
app pub date -
Jun 8, 1990
filing date -
Jun 8, 1990
priority date (Note) -
Expired
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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.
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