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

From: Hemodynamics and tissue oxygenation effects after increased in positive end-expiratory pressure in coronary artery bypass 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
VT, 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
  1. 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