A PU is a surgical procedure performed most frequently on cats. The intent of the procedure is to create a new opening (stoma) at the level of the pelvic urethra. In order to accomplish that, the entire penile urethra (and therefore the penis) must be amputated. The new stoma is placed at the level of the pelvic urethra because this is where the urethra is at its widest and therefore the least likely to be obstructed by the passage of small uroliths or organic debris.

A PU is a surgical procedure performed most frequently on cats. The intent of the procedure is to create a new opening (stoma) at the level of the pelvic urethra. In order to accomplish that, the entire penile urethra (and therefore the penis) must be amputated. The new stoma is placed at the level of the pelvic urethra because this is where the urethra is at its widest and therefore the least likely to be obstructed by the passage of small uroliths or organic debris.