Certified Surgical Technologist (CST) Practice Exam

What is the purpose of inserting a ureteral stent catheter?

1. Monitor urine output

2. Bypass calculi obstruction

3. Excise calculi

4. Prevent postoperative hemorrhage

The correct answer is: Bypass calculi obstruction

The purpose of inserting a ureteral stent catheter is primarily to bypass calculi obstruction. When a urinary stone (calculus) obstructs the flow of urine through the ureter, it can lead to serious complications such as hydronephrosis or infection. A ureteral stent catheter acts as a temporary solution to maintain urine flow from the kidney to the bladder, thereby alleviating the pressure caused by the obstruction. This device helps facilitate the drainage of urine and can provide symptomatic relief to the patient while further interventions, such as lithotripsy or ureteroscopy to remove the stones, may be planned. By ensuring that urine can bypass the obstruction, the stent plays a crucial role in preserving kidney function and preventing further complications. Monitoring urine output, excising calculi, and preventing postoperative hemorrhage are important aspects of urology and surgical care, but they are not the primary purposes of a ureteral stent. Monitoring urine output is typically achieved through other means, while excision of calculi refers to their removal rather than bypassing their location. Preventing postoperative hemorrhage involves a separate set of surgical techniques and interventions that do not directly relate to the purpose of a stent.