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Table 3 Ventilation parameters and points without and with CRS technique

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

Features Mean (95% CI) Mean difference (d = Ma – Mb) (95% CI) p-value
Without CRS (Mb) With CRS (Ma)
VE (l/min) 6.1 (5.8; 6.5) 9.3 (8.9; 9.7) 3.2 (2.6; 3.7) < 0.001
Ppeak (cm H2O) 18.2 (17.5; 18.8) 19 (18; 20) 0.7 (0.4; 1.0) < 0.001
Pmean (cm H2O) 7.9 (7.7; 8.1) 6.7 (6.5; 6.9) −1.2 (−1.4; −1.0) < 0.001
SpO2 (%) 98 (97; 99) 99 (98; 100) 1.0 (0.2; 1.5) < 0.001
EtCO2 (mm Hg) 36 (35; 37) 42 (40; 43) 6 (4; 7) < 0.001
PaO2 (mm Hg) 180 (170; 190) 320 (300; 340) 170 (160; 190) < 0.001
PaCO2 (mm Hg) 39 (38; 40) 43 (41; 45) 4.0 (0.4; 7.6) < 0.001
FiSev (vol%) 2.2 (2.1; 2.3) 7.3 (7.0; 7.6) 5.1 (4.9; 5.3) < 0.001
EtSev (vol%) 1.8 (1.7; 2.0) 1.0 (0.9; 1.1) −0.8 (−0.9; −0.7) < 0.001
MAC 0.91 (0.87; 0.95) 0.52 (0.48; 0.56) −0.39 (−0.44; −0.34) < 0.001
BIS 44 (42; 47) 53 (49; 56) 9 (5; 13) < 0.001
Points 2.3 (2.1; 2.6) 3.8 (3.7; 4.0) 1.6 (1.3; 1.8) < 0.001
  1. Notations: CI – confidence intervals; Mb and Ma – mean values before and after the application of the CRS technique, respectively; d – mean difference