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Table 2 Surgical outcomes and postoperative complications of the patients (n = 30)

From: One-stage tubeless percutaneous nephrolithotomy for asymptomatic calculous pyonephrosis

Statistical variables Results
Operative time (min, mean ± SD) 66.6 ± 34.7
Estimated intraoperative bleeding volume (mL, mean ± SD) 16.7 ± 14.3
Retained nephrostomy tube [cases, (%)]  
 Yes 3/30 (10.0)
 None 27/30 (90.0)
Postoperative hospital stay of all 30 patients (day, mean ± SD) 5.0 ± 3.1
Postoperative hospital stay of the 27 one-channel patients (day, mean ± SD) 4.6 ± 2.5
Pus culture [cases, (%)]  
 Negative 8/19 (42.1)
 Aspergillus chimaera 5/19 (26.3)
 Escherichia coli 3/19 (15.8)
 Klebsiella pneumoniae 2/19 (10.5)
 Pseudomonas aeruginosa 1/19 (5.3)
Postoperative blood WBC (109/L) 9.6 ± 4.3
Postoperative complications [cases, (%)]  
 None 26/30 (86.7)
 Body temperature > 38.5 °C 3/30 (10.0)
 Hemorrhage 1/30 (3.3)
 Sepsis, peripheral organ damage, death 0
Immediate stone-free rate in all 30 patients [cases, (%)] 25/30 (83.3)
Final stone-free rate in all 30 patients [cases, (%)] 28/30 (93.3)
Immediate stone-free rate in the 27 one-channel patients [cases, (%)] 25/27 (92.6)
Final stone-free rate in the 27 one-channel patients [cases, (%)] 25/27 (92.6)
Major stone composition [cases, (%)]  
 Calcium oxalate stones 15/30 (50.0)
 Infected stones 14/30 (46.7)
Anhydrous uric acid stones 1/30 (3.3)