The procedure described for OPD7389 primarily addressed what issue?

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The main idea is recognizing the core goal of the described procedure: removing a stent that has been left in place. A left double J stent is a ureteral stent used to ensure urine can drain around an obstruction, and when it becomes retained, the pressing clinical task is to extract it. That’s why the option describing the removal of the retained stent best fits the scenario—the procedure centers on getting the stent out rather than addressing a new drainage route, widening the ureter, or performing a purely diagnostic cystoscopy.

Removing a nephrostomy tube would target a different device and drainage pathway, not the stent. Ureteral dilation would be about widening the ureter to relieve a blockage, not extracting a stent. Cystoscopy alone could be part of the process to access and retrieve the stent, but if the description emphasizes removal of the retained stent itself, that is the primary objective rather than simply performing a cystoscopy.