Regarding ureteroscopy for ureteric calculi, the JJ (double-J) stent placed before the procedure primarily serves which purpose?
- A To prevent bacteremia during stone fragmentation
- B To tamponade mucosal bleeding during the procedure
- C To dilate the ureter passively over 1–2 weeks, facilitating subsequent ureteroscopy ✓
- D To dissolve uric acid calculi by alkalinizing urine
Correct answer: C. To dilate the ureter passively over 1–2 weeks, facilitating subsequent ureteroscopy
Explanation
Pre-stenting (passive ureteral dilation) with a JJ stent placed 1–2 weeks before ureteroscopy causes passive dilation of the ureter, making subsequent ureteroscope passage easier and reducing the need for active dilation, ureteral mucosal injury, and complications such as ureteral avulsion. This technique is particularly useful for small-caliber or previously unmanipulated ureters. It improves stone-free rates and reduces procedure-related complications.
Reference: Bailey & Love's Short Practice of Surgery, 27th ed.
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