Table 2 Comparison of ventilation parameters, hemodynamics and ABG between the CCC- and the 30:2 group

PIF (l/min)

76.3 (72.2–80.5)

51.7 (47.6–55.9)

18.7–30.4

< 0.001*

Vti (ml)

221.5 (206.8–236.3)

221.4 (206.6–236.2)

− 20.8–21.0

0.990

Vti (ml/kg)

6.8 (6.5–7.2)

6.4 (6.1–6.8)

− 0.1–0.9

0.087

Ti (s)

0.435 (0.413–0.457)

0.419 (0.397–0.441)

(− 0.015–0.048)

0.297

MV (ml)

2189.6 (2060.8–2318.4)

1267.1 (1136.1–1398.2)

738.7–1106.2

< 0.001*

PECO₂ (mmHg)

28.6 (22.3–34.8)

39.4 (33.1–45.6)

− 19.7–2.0

0.020*

Hemodynamics

 CPP (mmHg)

10.0 (2.5–17.4)

15.2 (7.7–22.6)

− 15.7–5.3

0.309

 maxAP (mmHg)

132.4 (94.9–170.0)

108.7 (71.2–146.3)

− 29.4–76.8

0.354

 minAP(mmHg)

− 4.8 (− 10.7–1.0)

− 3.2 (− 9.1–2.6)

− 9.9–6.7

0.686

 maxCVP (mmHg)

169.5 (146.3–192.7)

146.4 (123.3–169.5)

− 9.6–55.9

0.153

 minCVP(mmHg)

1.3 (− 5.2–7.7)

5.0 (− 1.3–11.3)

− 12.7–5.3

0.393

ABG

 PaO₂ (mmHg)

141.7 (86.2–196.8)

156.0 (103.4–208.6)

− 90.4–61.8

0.689

 PaCO₂ (mmHg)

50.2 (44.2–56.2)

61.1 (55.5–66.7)

− 19.1–2.7

0.013*

 Lactate (mmol/l)

5.6 (5.0–6.3)

5.4 (4.8–6.0)

− 0.7–1.1

0.633

 pH

7.3 (7.2–7.3)

7.2 (7.2–7.3)

0.01–0.1

0.029*