Transient ureteral obstruction after ureteral stenting

Area of Science:

• Urology
• Radiology
• Medical Device Complications

Background:

• Ureteral edema and obstruction are known risks of retrograde catheterization.
• Radiologists increasingly perform percutaneous procedures involving the upper urinary tract.

Observation:

• Four patients developed significant ureteral mucosal edema after percutaneous stent catheter placement.
• Two patients experienced transient ureteral obstruction post-stent removal due to this edema.

Findings:

• Indwelling ureteral stents, especially larger ones, can cause proximal and midureteral mucosal edema.
• This edema is a likely consequence of catheter pressure on ureteral tissues.

Implications:

• Recognizing and managing ureteral edema post-percutaneous procedures is crucial.
• Temporary proximal urinary diversion is recommended until edema resolves, typically 5-8 days.