With traction on the catheter one can visualize a complex of skeletal muscle and fibrous tissue that tethers the apex of the prostate to the pelvic floor musculature. This is the residual lateral and posterior components of the striated urethral sphincter. A right angle clamp has been passed immediately beneath the left edge of the sphincter. The neurovascular bundle is posterior to the right angle clamp and should not be injured during this maneuver.