Hydrostatic pressure of the renal pelvis as a radiation-free alternative to fluoroscopic nephrostogram following percutaneous nephrolithotomy

Table 2 Overview of the diagnostic accuracy of the PCNG method after PCNL

	Renal pelvis pressure
	\(\le\) 20 cmH₂O	> 20 cmH₂O
Diagnostic accuracy
No urine leakage	n = 128	n = 80
Persistent leakage	n = 9	n = 30
Sensitivity [95% CI]	76.9%, [60.7%; 88.9%]
Specificity [95% CI]	61.5%, [54.6%; 68.2%]
Negative predictive value [95% CI]	93.4%, [87.9%; 97.0%]
Positive predictive value [95% CI]	27.3%, [19.2%; 36.6%]
AUC [95% CI]	0.795 [0.668; 0.862]

ISSN: 1471-2490