Hemodynamics and tissue oxygenation effects after increased in positive end-expiratory pressure in coronary artery bypass surgery

Table 2 Hemodynamic and tissue oxygenation in seventy patients after CAB surgery

	PEEP 5	PEEP 12	p-value
HR, bpm	97 ± 16	92 ± 14	0.02
SAP, mmHg	109 ± 13	122 ± 17	0.12
DAP, mmHg	77 ± 16	81 ± 12	0.58
MAP, mmHg	89 ± 15	93 ± 13	0.65
Double product	10593 ± 411	11214 ± 459	0.17
Central venous pressure, mmHg	7 ± 2	8 ± 3	0.96
SpO₂, %	94 ± 3	96 ± 3	0.89
V_T, mL	597 ± 121	613 ± 130	0.33
RR, ripm	14 ± 1	14 ± 2	0.99
Catecholamine	12 (17%)	15 (21%)	0.21
Blood sample
Hb, g/dL	12 ± 1	12 ± 2	0.92
pH	7.37 ± 0.07	7.35 ± 0.06	0.05
PaO₂, mmHg	70.2 ± 6.2	112.8 ± 2.1	<0.0001
PaCO₂, mmHg	38.6 ± 8.8	38.7 ± 7.8	0.96
HCO₃ ⁻	22.1 ± 2.3	21.8 ± 1.6	0.03
BE	−2.4 ± 0.8	−3.5 ± 0.6	0.04
SaO₂, %	93 ± 3	97 ± 2	0.02
PaO₂/FiO₂ ratio	179 ± 24	271 ± 38	<0.0001
ScvO₂, %	63 ± 5	57 ± 3	0.01
Lactate, mmol/L	3.2 ± 1.1	6.7 ± 1.5	0.001

Abbreviations: HR heart rate, bpm beats per minute, SAP systolic arterial pressure, DAP diastolic arterial pressure, MAP mean arterial pressure, SpO ₂ hemoglobin saturation by pulse oximetry, V _T tidal volume, RR respiratory rate, ripm respiratory incursion per minute, Hb hemoglobin, pH hydrogen potential, PaO ₂ arterial oxygen pressure, PaCO ₂ arterial carbon dioxide pressure, HCO ₃ ⁻ bicarbonate, BE base excess, SaO ₂ arterial oxygen saturation, ScvO ₂ oxygen saturation of central venous blood. Values are expressed in mean ± standard deviation or frequency

ISSN: 2057-0082