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Guner B, Gurbuz C, Canat L, et al. Place of non contrast thin-slice spiral computed tomography in evaluation of stone-free ratio after percutaneous nephrolithotomy. Curr Urol. 2012;6(2):71-5doi: 10.1159/000343512.
Guner, B., Gurbuz, C., Canat, L., & Caskurlu, T. (2012). Place of non contrast thin-slice spiral computed tomography in evaluation of stone-free ratio after percutaneous nephrolithotomy. Current urology, 6(2), 71-5. https://doi.org/10.1159/000343512
Guner, Bayram, et al. "Place of non contrast thin-slice spiral computed tomography in evaluation of stone-free ratio after percutaneous nephrolithotomy." Current urology vol. 6,2 (2012): 71-5. doi: https://doi.org/10.1159/000343512
Guner B, Gurbuz C, Canat L, Caskurlu T. Place of non contrast thin-slice spiral computed tomography in evaluation of stone-free ratio after percutaneous nephrolithotomy. Curr Urol. 2012 Sep;6(2):71-5. doi: 10.1159/000343512. Epub 2012 Sep 27. PMID: 24917717; PMCID: PMC3783333.
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Curr Urol. 2012 Sep;6(2):71-5. doi: 10.1159/000343512. Epub 2012 Sep 27.

Place of non contrast thin-slice spiral computed tomography in evaluation of stone-free ratio after percutaneous nephrolithotomy.

Current urology

Bayram Guner, Cenk Gurbuz, Lutfi Canat, Turhan Caskurlu

Affiliations

  1. Department of Urology, Mus State Hospital, Mus, Turkey.
  2. Department of Urology, Medeniyet University, Istanbul, Turkey.

PMID: 24917717 PMCID: PMC3783333 DOI: 10.1159/000343512

Abstract

PURPOSE: To search the place of non contrast abdominal computed tomography to detect the stone-free rate after percutaneous nephrolithotomy (PNL) and the clinical importance of its superiority against to plain film radiography (KUB).

MATERIALS AND METHODS: Between February 2006 and July 2010, 62 patients including 27 women had no stone detected peroperative fluoroscopy and nephroscopy during PNL were included. Patients whom stone was not detected under 5 mm section upper abdomen non contrast spiral CT and KUB control in postoperative day 3 were defined as Group 1; patients whom stone was detected in a single slice CT were defined as clinically insignificant fragment (CIF)(Group 2) and patients whom stone was detected at least in two slice were defined as rest fragment (Group 3).

RESULTS: Median stone size were 22.3 mm (19-37 mm). Preoperative stone localization of groups were upper calyx, middle calyx, pelvis, lower calyx and 2.1, 14.9, 25.5 and 57.4%, respectively. CIF was detected in postoperative CT control of 12 (25.5%) patients whom stone was not followed in KUB and rest fragment was detected in 6 (12.8%) patients. Three of patients whom rest fragment was detected required an additional intervention for stone.

CONCLUSION: KUB which is routinely used to determine stone-free ratio after PNL operation is not sufficient to detect rest calculi and/or CIF existence in 38.3% patients. But when it is considered that most of rest stones detected were CIF and only 6.3% patients had additional intervention required rest calculi. We can think that CT follow-up is not absolutely required.

Keywords: Computed tomography; Fluoroscopy; Kidney stone; Percutaneous nephrolithtomy

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