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12 Cards in this Set

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