Whilst under general or spinal anaesthetic a laser fibre is introduced through a cystoscope into the prostatic urethra. The laser beam is directed at the obstructing prostatic tissue which is vaporised. Vaporisation is continued until there is a good unobstructed passage through the prostate. Haemostasis is normally good throughout the procedure. A urethral catheter is usually used for a short time post-op; this could be only a couple of hours or not at all.