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'Negative Ureteroscopy' for Stone Disease: Evidence from a Systematic Review
Patrick Rice1, Sarah Prattley1, Bhaskar K Somani2,3
1Department of Urology, University Hospital Southampton NHS Trust, Southampton, UK.
Current Urology Reports
|February 8, 2019
Summary
Negative ureteroscopy (URS) occurs in 4-14% of cases. Risk factors include female gender and distal, radiolucent stones. Low-dose CT scans may help avoid unnecessary URS procedures.
Area of Science:
- Urology
- Medical Imaging
Background:
- Ureteroscopy (URS) is a common procedure for ureteric stones.
- A 'negative URS' occurs when no stones are found, leading to unnecessary procedures.
Purpose of the Study:
- To determine the rate of negative URS.
- To identify risk factors associated with negative URS.
Main Methods:
- Systematic review of relevant literature.
- Analysis of 4 studies involving 1336 patients.
Main Results:
- The negative URS rate ranged from 4% to 14%.
- Predictors for negative URS included female gender, small stones, radiolucent stones, and distal ureteric stones.
Conclusions:
- Negative URS, though infrequent, can be minimized.
- Low-dose CT scans on the day of surgery are recommended, particularly for high-risk patients (females, small/radiolucent/distal stones).