This approach involves denaturing the tissue using deeply penetrating laser light. The laser energy creates a coagulative necrosis. Said another way, the prostatic tissue is cooked to the point of death. The necrosed (or dead) tissue is then either reabsorbed into the body or sloughs out in the urine. Realization of the full clinical benefits of laser ablation can take weeks to achieve and a catheter is generally required for one to three weeks and occasionally longer. Irritativeurinary symptoms and discomfort can accompany this approach.
Laser ablation is generally performed with deep penetrating laser wavelengths such as those created with Nd:YAG lasers (1064nm) or diode lasers (980nm). The energy can be directed into the tissue with a side-firing laser fiber from within the prostatic urethra, or emitted directly into the tissue through interstitial laser fibers which are inserted into the prostatic tissue from within the prostatic urethra. Laser ablation is tending to give way to laser vaporization or laser vapo-resection techniques.