Choice A rationale Increasing the irrigation rate is a secondary intervention used to prevent clot formation or to clear existing obstructions. However, if the catheter is already obstructed or kinked, increasing the flow will lead to rapid bladder distention and severe pain. The nurse must first determine if the tubing is patent before adding more fluid into a potentially closed system to avoid causing trauma or bladder rupture. Choice B rationale Clamping an indwelling urinary catheter after a transurethral resection of the prostate is contraindicated. Continuous bladder irrigation is designed to keep the bladder clear of blood and clots. Clamping the tube would allow blood to accumulate and coagulate within the bladder, leading to painful distention and potential hemorrhage. This action does not address the lack of output and actually increases the risk of serious postoperative complications. Choice C rationale Assessment is the first step of the nursing process and is critical when a sudden cessation of urinary output occurs. The nurse should check the tubing for kinks, loops, or clots that might be obstructing the flow. In the immediate postoperative period of a prostatectomy, maintaining a patent drainage system is the priority to prevent bladder spasms and ensure the surgical site remains stable and free from pressure. Choice D rationale Notifying the provider is an appropriate action but only after the nurse has performed a thorough assessment and tried simple bedside troubleshooting. If the nurse calls the provider without first checking for kinks or attempting to irrigate the catheter according to standing orders, they lack the necessary information to give a concise report. Assessment must precede notification to ensure the provider can make an informed clinical decision.