An OTIS urethrotomy is the blind transurethral incision of the urethra by an Otis urethrotome. After insertion of the Otis urethrotome, the urethra is dilated to the desired width and a blade cuts the stretched urethra at the 12 oïclock position. OTIS Urethrotome is also called as Blind Internal Urethrotomy.
The Otis urethrotomy is reserved for the palliative treatment of long-segment strictures of the male urethra or to treat proximal narrowing of the female urethra. Otis urethrotomy is also performed before the use of old resectoscopes (> 26 CH) in a narrow urethra to prevent ischemic damage.