Table 1.

The changes in total functions and BUN-creatinine levels before and after surgery are shown.

All patients (n) 37	Before PCNL	After PCNL	P
Total scintigraphic functions of kidneys	21.9 ± 11.7	22.7 ± 6.3	0.054
BUN	13.9 ± 3.5	13.0 ± 4.8	0.79
Creatinine	0.9 ± 0.2	1.0 ± 0.4	0.03

PCNL: percutaneous nephrolithotomy.