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11 Cards in this Set
- Front
- Back
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formula: DO2
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CaO2 × cardiac output × 10
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formula: alveolar air
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(PB - PH2O)FIO2 - PaCO2 / 0.8 (if FiO2>.60)
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formula: CaO2 (arterial oxygen content)
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(Hb × 1.34 × SaO2) + (PaO2 × 0.003)
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formula: Ve (minute ventilation)
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F × tidal volume
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how is optimal PEEP determined in terms of FiO2 and PaO2?
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PEEP that improves oxygenation without depressing cardiac output
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what tidal volume would you set for a patient with ARDS?
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4 to 8 mL/kg ideal body weight (IBW)
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what tidal volume would you set for a patient with COPD?
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6 to 10 mL/kg IBW
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what tidal volume would you set for a patient with normal lungs?
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6 to 10 mL/kg IBW
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what effect does minute ventilation have on PaCO2?
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An inverse relationship, so increased minute volume decreases CO2.
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Where is gas distributed by a normal spontaneous breath?
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dependent and peripheral portions of the lung
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where is gas distributed by a positive pressure breath?
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nondependent lung zones
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