Abstract：
OBJECTIVE:To assess stone-free rates following ureteroscopy (URS) for renal calculi at our institution using low-dose renal only computed tomography (CT). METHODS:A retrospective review of patients undergoing flexible URS for renal stones only with subsequent CT scan within 3 months. Meticulous basketing of all stone fragments was performed whenever possible. A "true" zero-fragment stone-free rate was determined by reviewing the CT scan and radiologist's report. Patients with nephrocalcinosis (as determined by visual inspection of papilla at the time of URS) were assigned the "stone-free" category. RESULTS:Flexible URS was performed in 288 renal units of 214 patients with renal calculi from 2013 to 2016. Median preoperative stone size was 6.2 mm with the average kidney containing 6.4 stones. An access sheath was used in 92% of cases. A total of 73% (209/288) renal units were completely stone free by CT assessment. Patients with residual fragments were as follows: 1 mm in 2% (7/288), 2-4 mm in 16% (46/288), and >4 mm in 9% of kidneys (26/288). CONCLUSION:The true stone-free rate in patients undergoing flexible URS for renal calculi utilizing active basketing of fragments as determined by strict CT assessment was 73%. In patients with residual fragments, the majority are 2-4 mm in size making URS a treatment option for renal calculi with excellent stone-free results.
journal_name
Urologyjournal_title
Urologyauthors
York NE,Zheng M,Elmansy HM,Rivera ME,Krambeck AE,Lingeman JEdoi
10.1016/j.urology.2018.09.005subject
Has Abstractpub_date
2019-02-01 00:00:00pages
52-56eissn
0090-4295issn
1527-9995pii
S0090-4295(18)30954-3journal_volume
124pub_type
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