The presently described catheter is an improved multi-function hypospadias catheter adapted to be urethrally inserted and secured within a patient's bladder using an attached internal crescent shaped retention balloon. The inverted crescent configuration of the balloon reduces the contact surface area between the balloon and a patient's bladder wall to reduce bladder spasms. The catheter is removed from the patient (when needed) via deflation of the crescent shaped balloon, which deflates completely so as to not contact a patient's urethra during insertion and removal of the catheter. The catheter includes a double lumen with a one-way flow valve. One lumen provides a passageway to drain urine from a patient's bladder. The second lumen provides a passageway to inflate and deflate the crescent shaped retention balloon.
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