title: Middle calyx access is better for single renal pelvic stone in ultrasound-guided percutaneous nephrolithotomy.
abstract: To compare the outcomes among upper calyx, middle calyx, and lower calyx access in complete ultrasound-guided percutaneous nephrolithotomy (PCNL) for single renal pelvic stone. Between July 2014 and September 2015, the data of 153 patients with single renal pelvic calculi were retrospectively reviewed in this study and patients were divided to group 1 (45 patients, upper calyx access), group 2 (57 patients, middle calyx access), and group 3 (51 patients, lower calyx access). Preoperative characteristics and intraoperative and postoperative parameters were analyzed and compared. A p value of <0.05 was considered significant. Important patient- and stone-related parameters were similar among the three groups. The mean operative time was significantly shorter in the middle calyx group than the lower and upper calyx groups (41.2 ± 6.9 vs. 50.2 ± 9.3 and 46.0 ± 9.6 min, respectively). The middle calyx group had a higher stone-free rate than the lower and upper calyx groups (98.20 vs. 84.3 % and 93.3 %, respectively, p = 0.037). There were no significant differences in mean postoperative hemoglobin decrease and incidence of complications among groups (p = 0.42 and 0.862, respectively). Middle calyx access achieved superior outcomes for removal of single renal pelvic stone via ultrasound-guided PCNL.
authors.affiliation: Urology Division, Sheng Jing Hospital, China Medical University, Shenyang, 110004, People's Republic of China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Song
authors.affiliation: Urology Division, Sheng Jing Hospital, China Medical University, Shenyang, 110004, People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Jin
authors.affiliation: Tianjin Key Laboratory of Chinese Medical Pharmacology, Institute of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China.
authors.forename: Shengyu
authors.initials: S
authors.lastname: Hua
authors.affiliation: Urology Division, Sheng Jing Hospital, China Medical University, Shenyang, 110004, People's Republic of China. fei_xiang918@163.com.
authors.forename: Xiang
authors.initials: X
authors.lastname: Fei
mesh_terms: D005260:Female; D006801:Humans; D007669:Kidney Calculi / Q000000981:diagnostic imaging* / Q000473:pathology / Q000628:therapy*; D007670:Kidney Calices; D008297:Male; D008875:Middle Aged; D009403:Nephrostomy, Percutaneous / Q000379:methods*; D012189:Retrospective Studies; D018084:Ultrasonography, Interventional
keywords: Kidney stone; Percutaneous nephrolithotomy; Renal access; Renal calyx; Ultrasound