Abstract
Background and Purpose: Most series on ureteroscopy for urolithiasis use postoperative plain radiography of the kidneys, ureters, and bladder (KUB) or intravenous urography (IVU) to determine outcomes. These imaging modalities, however, are not very sensitive and may overestimate stone-free rates (SFRs). The aim of our study was to assess SFRs after ureteroscopy for urolithiasis using CT follow-up. Patients and Methods: A total of 92 patients underwent 113 ureteroscopic procedures for either renal or ureteral stones. Success of ureteroscopy was then determined by the absence of any stone fragments (stone-free). Stone-clearance rates (SCRs) were also calculated for ≤2mm and ≤4mm residual stone fragments. Results: Each renal unit contained a mean of 1.87stones with a mean stone diameter of 8± 6mm. The overall SFR was 50.4%. SFRs were significantly higher for ureteral stones (80%) than renal stones (34.8%) (P= 0.0001). Renal units with multiple stones were less likely to be stone free than those with single stones (P= 0.011). No difference in SFRs was found between lower pole and non-lower-pole stones. Conclusions: Overall SFRs by CT were lower than SFRs reported by radiography of the KUB or IVU criteria. Further studies to identify the clinical significance and natural history of residual stone fragments on CT scan after ureteroscopy are needed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 379-382 |
| Number of pages | 4 |
| Journal | Journal of Endourology |
| Volume | 23 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 1 2009 |
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ASJC Scopus subject areas
- Urology
- Medicine(all)
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Computed tomography-determined stone-free rates for ureteroscopy of upper-tract stones. / MacEjko, Amanda; Okotie, Onisuru T.; Zhao, Lee C.; Liu, Jonathan; Perry Jr, Kent T; Nadler, Robert B.
In: Journal of Endourology, Vol. 23, No. 3, 01.03.2009, p. 379-382.Research output: Contribution to journal › Article
TY - JOUR
T1 - Computed tomography-determined stone-free rates for ureteroscopy of upper-tract stones
AU - MacEjko, Amanda
AU - Okotie, Onisuru T.
AU - Zhao, Lee C.
AU - Liu, Jonathan
AU - Perry Jr, Kent T
AU - Nadler, Robert B
PY - 2009/3/1
Y1 - 2009/3/1
N2 - Background and Purpose: Most series on ureteroscopy for urolithiasis use postoperative plain radiography of the kidneys, ureters, and bladder (KUB) or intravenous urography (IVU) to determine outcomes. These imaging modalities, however, are not very sensitive and may overestimate stone-free rates (SFRs). The aim of our study was to assess SFRs after ureteroscopy for urolithiasis using CT follow-up. Patients and Methods: A total of 92 patients underwent 113 ureteroscopic procedures for either renal or ureteral stones. Success of ureteroscopy was then determined by the absence of any stone fragments (stone-free). Stone-clearance rates (SCRs) were also calculated for ≤2mm and ≤4mm residual stone fragments. Results: Each renal unit contained a mean of 1.87stones with a mean stone diameter of 8± 6mm. The overall SFR was 50.4%. SFRs were significantly higher for ureteral stones (80%) than renal stones (34.8%) (P= 0.0001). Renal units with multiple stones were less likely to be stone free than those with single stones (P= 0.011). No difference in SFRs was found between lower pole and non-lower-pole stones. Conclusions: Overall SFRs by CT were lower than SFRs reported by radiography of the KUB or IVU criteria. Further studies to identify the clinical significance and natural history of residual stone fragments on CT scan after ureteroscopy are needed.
AB - Background and Purpose: Most series on ureteroscopy for urolithiasis use postoperative plain radiography of the kidneys, ureters, and bladder (KUB) or intravenous urography (IVU) to determine outcomes. These imaging modalities, however, are not very sensitive and may overestimate stone-free rates (SFRs). The aim of our study was to assess SFRs after ureteroscopy for urolithiasis using CT follow-up. Patients and Methods: A total of 92 patients underwent 113 ureteroscopic procedures for either renal or ureteral stones. Success of ureteroscopy was then determined by the absence of any stone fragments (stone-free). Stone-clearance rates (SCRs) were also calculated for ≤2mm and ≤4mm residual stone fragments. Results: Each renal unit contained a mean of 1.87stones with a mean stone diameter of 8± 6mm. The overall SFR was 50.4%. SFRs were significantly higher for ureteral stones (80%) than renal stones (34.8%) (P= 0.0001). Renal units with multiple stones were less likely to be stone free than those with single stones (P= 0.011). No difference in SFRs was found between lower pole and non-lower-pole stones. Conclusions: Overall SFRs by CT were lower than SFRs reported by radiography of the KUB or IVU criteria. Further studies to identify the clinical significance and natural history of residual stone fragments on CT scan after ureteroscopy are needed.
UR - http://www.scopus.com/inward/record.url?scp=65549132871&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=65549132871&partnerID=8YFLogxK
U2 - 10.1089/end.2008.0240
DO - 10.1089/end.2008.0240
M3 - Article
C2 - 19250025
AN - SCOPUS:65549132871
VL - 23
SP - 379
EP - 382
JO - Journal of Endourology
JF - Journal of Endourology
SN - 0892-7790
IS - 3
ER -