Fig. 1From: Reasons and risk factors for delayed discharge after day-surgery percutaneous nephrolithotomyNomogram for predicting the probability of postoperative delayed discharge after day-surgery PCNL in patients. NIT: Urine nitrite; Burden: Stone burden; Time: Surgery time; Tube: Number of nephrostomy tube. PCNL = percutaneous nephrolithotomyBack to article page