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Spontaneous knot formation complication of double J: two case reports
1Department of Urology, University of Health Sciences, Fatih Sultan Mehmet Research & Training Hospital, 34758, Istanbul, Turkey. ahmetkolu@gmail.com.
Journal of Medical Case Reports
|March 13, 2024
Summary
Double J (DJ) stent knotting is a rare complication. This report suggests spontaneous knot formation may occur due to ureteral peristalsis or anomalies, not just traction.
Area of Science:
- Urology
- Medical Devices
- Patient Safety
Background:
- Ureteral stents are common in urology but can cause complications.
- Double J (DJ) stent knotting is a rare but significant complication.
- Existing literature often attributes knotting to external traction.
Observation:
- Two patients with ureteral stones presented with pain.
- Narrow ureters were noted during endoscopic stone treatment.
- Knot formation in Double J (DJ) stents was observed on pre-removal radiographs.
Findings:
- Spontaneous knot formation in Double J (DJ) stents can occur.
- Ureteral peristalsis and ureteral anomalies are potential causes of spontaneous knotting.
- Gentle traction under general anesthesia was effective for stent removal.
Implications:
- Highlights a novel cause for Double J (DJ) stent knotting.
- Emphasizes the importance of pre-removal radiography for detecting stent complications.
- May influence future stent management and patient monitoring protocols.
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