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The fоllоwing were оbtаined while аn аdult patient was receiving controlled mechanical ventilation. 1 a.m. 4 a.m. 5 a.m. 6 a.m. 7 a.m. 8 a.m. Peak pressure (cm H2O) 40 45 46 50 52 58 PEEP (cm H2O) 0 6 8 10 12 14 FiO2 0.9 0.9 0.9 0.9 0.9 0.9 PaO2 (mm Hg) 40 60 65 70 75 80 PvO2 (mm Hg) 28 39 43 45 42 27 Blood pressure (mm Hg) 140/90 130/90 120/90 120/80 118/80 100/70 Cardiac output (L/min) 3.5 3.5 3.6 3.6 3.2 2.8 On the basis of this data, which of the following level of PEEP is best for this patient?
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