Korean J Urol.  2015 Jan;56(1):63-67. 10.4111/kju.2015.56.1.63.

Ureteral stricture formation after ureteroscope treatment of impacted calculi: A prospective study

• Fam XI
• Singam P
• Ho CC
• Sridharan
• Hod R
• Bahadzor B
• Goh EH
• Tan GH
• Zainuddin

• KMID: 2070270
• DOI: http://doi.org/10.4111/kju.2015.56.1.63

Abstract

PURPOSE
Urinary calculi is a familiar disease. A well-known complication of endourological treatment for impacted ureteral stones is the formation of ureteral strictures, which has been reported to occur in 14.2% to 24% of cases.
MATERIALS AND METHODS
This was a prospective study. Ureterotripsy treatment was used on patients with impacted ureteral stones. Then, after 3 months and 6 months, the condition of these patients was assessed by means of a kidney-ureter-bladder (KUB) ultrasound. If the KUB ultrasound indicated moderate to serious hydronephrosis, the patient was further assessed by means of a computed tomography intravenous urogram or retrograde pyelogram to confirm the occurrence of ureteral strictures.
RESULTS
Of the 77 patients who participated in the study, 5 developed ureteral strictures. Thus, the stricture rate was 7.8%. An analysis of the intraoperative risk factors including perforation of the ureter, damage to the mucous membrane, and residual stone impacted within the ureter mucosa revealed that none of these factors contributed significantly to the formation of the ureteric strictures. The stone-related risk factors that were taken into consideration were stone size, stone impaction site, and duration of impaction. These stone factors also did not contribute significantly to the formation of the ureteral strictures.
CONCLUSIONS
This prospective study failed to identify any predictable factors for ureteral stricture formation. It is proposed that all patients undergo a simple postoperative KUB ultrasound screening 3 months after undergoing endoscopic treatment for impacted ureteral stones.

Keyword

Ureter; Ureterolithiasis; Ureteroscopy

MeSH Terms

Constriction, Pathologic/*diagnosis
Humans
Hydronephrosis/diagnosis
Kidney/ultrasonography
Prospective Studies
Risk Factors
Ureter/*pathology/ultrasonography
Ureteral Calculi/*therapy
Ureterolithiasis/*surgery
Ureteroscopy/*adverse effects
Urinary Bladder/ultrasonography

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