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Table 1 Patient characteristics intra and postoperative results

From: Magnetic levitation pump versus constrained vortex pump: a pilot study on the hemolysis effect during minimal invasive extracorporeal circulation

  Levitation Group (n = 20) Vortex Group (n = 20) P-value
Preoperative    
Age (years) (mean ± SD) 71.0 (63.7) 69 (58.7) 0.89
Body surface area (m2) 1.83 1.82 0.94
EuroSCORE II 1.5 1.7 0.88
Pre-CPB hematocrit (%) (mean ± SEM) 34.6 ± 1.3 34.8 ± 2.1 0.99
Hb (g/dL) 12.3 ± 1.1 12.3 ± 1.2 1
Serum creatinine (g/dL) 0.83 ± 0.5 0.85 ± 0.7 0.96
PFH (mg/L) 0.02 0.01 1
Intraoperative    
CPB time (min) 72 ± 15.2 71 ± 7.36 1
Aortic cross-clamp time (min) 52 ± 9 51 ± 7 0.93
DOi2 (mL/min/m2) 339 ± 20 338 ± 17 0.99
CI (L/min/m2) 2.4 ± 0.2 2.4 ± 0.1 0.99
Pump speed (rpm) 2800 ± 140 2880 ± 160 0.98
Pump inlet pressure (mmHg) 56 ± 10 58 ± 9 0.88
CVP (mmHg) 5 ± 3 6 ± 2 0.89
Hct (%) 34 ± 2 32 ± 1 0.69
Hb (g/dL) 11.5 ± 0.5 11.3 ± 0.6 0.76
Oxygenator pressure drop (mmHg) 45 ± 4 41 ± 2 0.79
Arterial pressure cannula (mmHg) 105 ± 9 104 ± 7 0.89
MAP (mmHg) 65 ± 7 63 ± 4 0.91
Postoperative    
PFH at 10 min after CPB (mg/L) 10.6 ± 0.7 19.9 ± 0.3 0.034
LDH at 24 h after CPB (IU/L) 99.16 ± 1.7 139.17 ± 1.5 0.027
Creatinine peak after CPB (mg/dL) 0.92 1.29 0.030
RBC (units) 3 (0.15/patient) 9 (0.45/patient) 0.017
Indirect bilirubin after CPB (mg/dL) 0.6 ± 0.4 1.5 ± 0.9 0.022
  1. CI, cardiac index; CPB, cardiopulmonary bypass; CVP, central venous pressure; DOi2, indexed oxygen delivery; Hb, hemoglobin; Hct, hematocrit; LDH, lactate dehydrogenase; MAP, mean arterial pressure; PFH, plasm free hemoglobin; RBC, red blood cells; SD, standard deviation; SEM, standard error of the mean