Critical Care Research and Practice

Research Article

Heart-Protective Mechanical Ventilation in Postoperative Cardiosurgical Patients

Table 2

Changes in oxygenation, elimination of CO₂, and acid-base balance of arterial blood in patients from the interventional group, median (25^th; 75^th percentile), n = 95.


Data	Hours in ICU
Data	#1	#2	#3

PaO₂/FiO₂ (mmHg)	237.0 (184.0; 333.3)	324.0 (274.0; 372.0)	292.0 (232.0; 346.0)	<0.001

PaCO₂ (mmHg)	30.0 (28.0; 34.0)	36.0 (33.2; 40.0)	39.0 (35.0; 43.0)	<0.001

etCO₂ (mmHg)	27.0 (24.0; 29.0)	34.0 (32.0; 37.0)	38.0 (34.0; 40.0)	<0.001

Arterial рН	7.45 (7.40; 7.48)	7.38 (7.34; 7.41)	7.34 (7.32; 7.39)	<0.001

РаСО₂ >45 mmHg rate	0	4.2%	13.7%	<0.001 = 0.023 = 0.044

Arterial рН <7.35 rate	2.1%	26.3%	52.6%	<0.001

Arterial ВЕ	−1.6 (−3.2; −0.1)	−3.1 (−4.3; −1.5)	−3.4 (−4.7; −1.9)	<0.001 = 0.2 <0.001

Arterial НСО₃⁻	21.0 (20.0; 23.0)	21.0 (20.0; 22.0)	21.0 (20.0; 22.0)	= 0.4 = 0.4 = 0.1

PaO₂/FiO₂: respiratory index; PaCO₂: partial pressure of carbon dioxide in arterial blood; etCO₂: expired carbon dioxide; P: the Wilcoxon test.