BUMC Basics.pdf - Anesthesia Home

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MECHANICAL VENITALTION
Oxygen support
Nasal Cannula (NC)
• Each L adds about 3% FiO2 therefore 1L is 24% FiO2
w/ max of 6L and thus Max FiO2 of about 40%
Venturi Mask (VM): Can set an FiO2
• Max FiO2 of 50%
Partial ReBreather (PRB) Mask w/ Reservoir Bag (exhaled
gas mixes with bag oxygen)
• Max FiO2 of 75%
Non-ReBreather (NRB) Mask w/ Reservoir Bag (exhaled gas
does not mix with bag oxygen)
• Max FiO2 of 100%
Types of ventilatory support
Noninvasive Positive Pressure Ventilation (NPPV)
Face/Nasal Mask Continuous Positive Airway Pressure
(CPAP): One continuous pressure during inspiration and
expiration
Uses: Patients whose primary problem is hypoxemia;
typically used with CHF patients as well as OSA
Face/Nasal Mask Bilevel Positive Airway Pressure (BiPAP):
Set different inspiratory/expiratory pressures
Uses: Patients whose primary problem is hypoventilation
or hypoxemia such as COPD, immunocompromised, postextubation
especially if patient is high risk, DNI patients,
PNA, etc.
Inspiratory Pressure (IP): Start at 8 to 10 cm of H2O and
increase as tolerated to improve Tidal Volume (TV) and
decrease work of breathing, which will result in decreased
pCO2.
Expiratory Pressure (EP) ~ PEEP start at 4 to 5 cm of H2O and
increase as tolerated to increase PO2.