Gold-Tip Laser Sleeve for a Bare Fiber

Abstract

A gold-tip laser sleeve for a bare laser fiber has been used for Nd:YAG laser irradiation of the prostate in both the canine model and a pilot clinical series. In the animal model, irradiation was undertaken using the Ablaser catheter through an open suprapubic cystotoniy, and the procedure was monitored by video endoscopy via a perineal urethrostomy. Intraprostatic heating profiles were determined using real-time interstitial thermometry. As long as no carbonization occurred, irradiation with higher wattage resulted in higher intraprostatic temperatures. The "popcorn effect" caused a superficial temperature reduction but did not alter the ability of thermal conduction to heat deeper in the prostate. A small series of patients has been treated, with good results.