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12 Cards in this Set
- Front
- Back
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which pressure is responsible for maintaining normal alveolar inflation?
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transpulmonary pressure
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which pressure gradient is required to expand the lungs and chest wall together
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transthoracic
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which pressure causes airflow in the airways
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trans airway
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what happens to transpulmonary pressure during normal inspiration?
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small decrease
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what happens to transpulmonary pressure during normal exhalation?
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Small increase
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what happens to transpulmonary pressure during inspiration with a negative pressure ventilator?
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Transpulmonary pressure decreases
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what happens to transpulmonary pressure during exhalation with a negative pressure ventilator?
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Transpulmonary pressure increases
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what happens to the airway and plural pressures during inspiration with a positive pressure ventilator?
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Airway pressures rise during inspiration
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how does mechanical ventilation improve oxygenation when the cause of hypoxemia is hypoventilation?
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It simply restores alveolar ventilation by removing CO2 which increases PaO2
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VQ mismatch responds readily to mechanical ventilation to improve oxygenation as the ventilator _____ is increased
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FIO2 setting
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during mechanical ventilation, if an increased FIO2 does not improve PaO2 then it suggests the presence of _____ which normally responds to ____ therapy.
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shunt; PEEP
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what range of FiO2 can a modern ICU ventilator deliver?
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0.21 to 1.0
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