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Table 2 Patient and stone characteristics

From: Reducing kidney motion: optimizing anesthesia and combining respiratory support for retrograde intrarenal surgery: a pilot study

Feature Mean (range)
Sample size, n 38
Age, years 49 (45; 53)
Body mass index, kg/m2 27 (25; 28)
ASA, scores 2 (1; 3)
Maximum diameter of the stone, mm 10 (10; 14)
Density of the stone, HU 1060 (930; 1190)
Stone location
 Upper calyx 16
 Middle calyx 11
 Lower calyx 7
 Pyelus 4
Duration of RIRS, min 26 (14; 32)
Stone free rate 86%