Breathe Easy Pediatrics Presents: Tidal Volume Episode 6 – RC Time Constants
ATS Breathe Easy
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Mechanically Ventilating a Patient, the End Expiratory Lung Volume Will Not Be Exhaled
Auto-peep is not significant if you allow for three time constants when mechanically ventilating a patient. Even though initially about 5% of the inspired tidal volume will not be exhaled, an equilibrium at a somewhat higher end expiratory lung volume will soon be established. This occurs because as the respiratory system resistance decreases and the respiratory system compliance decreases.
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