Balloon laserthermia of the canine prostate

-Experimental results-

Abstract

As the therapy for benign prostatic hyperplasia(BPH), transurethral resection of the psotate(TURP) is widely accepted as the“gold standard”of surgical therapy. Recently, however, conservative treatment has received more attention. Balloon laserthermia of the prostate by Nd: YAG laser is considered a conservative one.
In this paper, we reported results of 4 different examinations by using balloon laser fiber. 1. Laser prostatectomy. Therapeutic conditions included irradiation at 15W for 20 minutes, while the temperature of 5mm depth below the urethral mucosa was maintained at 60°C without urethral cooling. After 4 weeks, cavity formations in the prostatic urethra were completed. 2. Thermal damage of the prostatic tissues. Muscle damage of the urethral sphincter occurred above 43.2°C for 20 minutes. Protection of urethral sphincter is indispensable. 3. Interstitial temperature measurement during laserthermia. The effect of cooling of the tissue was within 6mm and direct transmission of the laser energy was within 10mm. 4. Urethral compliance after laserthermia. Urethral compliance increased after laserthermia.