What is an instrument used to inspect the urinary bladder?

The most commonly used device for urinary catheterization is the transurethral catheter which is a flexible tubing that is passed through the urethra until the tip is within the bladder and urine flow is established. The Foley catheter has a balloon at the tip which can be inflated with water to prevent the catheter from dislodging spontaneously. In emergency situations where a catheter cannot be passed transurethrally either because of severe obstruction or risk of further urinary tract injury, such as with an acute pelvic fracture with an associated urethral laceration, a suprapubic catheter can be passed into the bladder through a small incision made in the skin above the pubic bone.