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Table 1 Patient characteristics

From: Mechanisms of pulmonary dysfunction after on-pump and off-pump cardiac surgery: a prospective cohort study

  Off pump n = 8 On pump n = 31
Prior to and during surgery   
Age, year 65 (56–74) 62 (38–75)
Sex, m/f 8 (100) 23 (74)/8 (26)
Euroscore 2 (0–5) 3 (0–7)
LV ejection fraction <50% 1 (12) 6 (19)
COPD 0 5 (16)
CPB time, min 0 114 (40–198)
Aortic clamp time, min 0 76 (26–155)
Pleurotomy 8 (100) 19 (61)*
Aortic valve replacement 0 9 (19)
Closure atrial septal defect 0 2 (6)
Number of grafts 4 (2–5) 4 (1–7)
Lowest temperature, °C 36.0 (35.7–36.2) 31.4 (27.8–35.8)*
Red blood cell concentrates 0 (0–4) 0 (0–5)
In the ICU   
APACHE II 8 (3–13) 9 (2–15)
Dopamine, mg/h 8 (0–28) 8 (0–40)
Nitroglycerin, mg/h 0.5 (0–1) 0.5 (0–2.5)
  1. Median (range) or number of patients, where appropriate. Abbreviations: ICU, intensive care unit; LV left ventricle; COPD, chronic obstructive pulmonary disease; CPB, cardiopulmonary bypass; APACHE II, acute physiology and chronic health evaluation. *P = 0.042; *P < 0.0001