Chapter 14: Table of Contents
Antegrade catheterization is helpful in cases where retrograde catheterization has failed. Under fluoroscopic guidance, an over-the-needle catheter is inserted percutaneously into the distended urinary bladder. A weasel wire is then advanced through the catheter, into the bladder and directed towards the trigone and down the urethra in an antegrade fashion. Once the wire is visualized at the urethral papilla, a urinary catheter (with the tip cut off) is advanced over the wire and into the urinary bladder in a retrograde direction.