Unit 2 Flashcards
Arterial Blood Gases
pH 7.35-7.45
PaCO2 35-45
HCO3 22-26
PaO2 80-100
Mixed Venous Blood Gases
pH 7.33-7.41
PaCO2 41-51
HCO3 35-40
PaO2 22-26
Tidal Volume
Volume of each breath
Fraction of Inspired O2
FiO2
Concentration of O2 delivered
(Room air 21%)
Nasal cannula +4% each liter
Venturi +7% each liter
Continuous Positive Airway Pressure
CPAP
Provides air pressure to keel alveoli open
Positive End Expiratory Pressure
PEEP
Positive pressure maintained by the ventilator and the end of expiration to increase final residual capacity and open collapsed alveoli
Improves oxygenation with lower FiO2
(Higher PEEP, lower blood pressure)
End Tidal Carbon Dioxide
CO2 remaining in body after expiration
Assist controlled
Ventilator setting that delivers a set tidal volume & rate, but allows spontaneous breathing & will still receive full tidal volume
Controlled mandatory ventilation
Ventilator setting that has a set tidal volume and rate
Requires sedation and paralysis
The patient has no drive to breathe
Synchronized Intermittent Mandatory Ventilation
Ventilator setting that has a set rate & tidal volume, but patient may breathe spontaneously, however; they will only receive the volume that they are able to inspire
Pressure Support
Ventilator setting that allows for full spontaneous breathing & gives additional pressure during the breath cycle
usually used for weaning
Ventilator checks
Connection Tube patentcy Water in tube Air temp Limit settings
High pressure alarm
Resistance to or obstruction of air flow from:
Biting in ETT, kink in tubing, brochospasms, pneumothorax
Low pressure alarm
Indications disconnection from machine, displacement of airway, leak in system, self-extinction
