Invasive Mechanical Ventilation Modes Flashcards
What is the goal of mechanical ventilation?
Facilitate CO2 release and normal PaCO2 levels
What is the formula for MV
RR x TV
How can we alter ventilation on the ventilator?
Adjust RR or TV
How can we adjust oxygenation on the ventilator?
Adjust PEEP or FIO2
What is the concept of pressure cycle vent modes and what are the four examples
Pressures is the fixed independent variable, volume is the dependent variable
Pressure Support Ventilation (PSV)
Pressure Control Ventilation (PCV)
CPAP
BIPAP
What is the concept of volume cycle modes on the vent and what are examples
Volume is the independent variable and pressure is the dependent variable
Volume Control
Volume Support
ASV (Assist control ventilation)
Intermittent Mandatory Ventilation (IMV)
Synchronous Intermittent Mandatory Ventilation (SIMV)
What is Pressure Support Ventilation (PSV) and what are its benefits? What does the patient determine/Vent determine?
Patient determines: RR, Inspiratory time, Volume
It is triggered by the patient’s own breath present during inspiration only
Essentially only overcomes the pressure of the vent tubing to allow a person to breath
Works well in conjunction with SIMV or as a weaning trial
Describe Pressure Control Ventilation (PCV). What does the patient control vs vent? What are the uses and disadvantages
Vent determines Inspiratory time and pressure
Patient controls volume
Disadvantage: requires frequent adjustments to maintain MV (Ve)
What is Assist/Control Ventilation (ACV)
Vent controls minimal rate and TV
Patient can trigger vent for additional breaths
What is Intermittent Mandatory Ventilation (IMV)
Either volume or pressure controlled breathes are delivered at a set minimum rate, the patient can breath over the vent
Not timed with patient’s breathing
Patient breathes are not supported with TV
What is SIMV
Most commonly used mode
Spontaneous breathes and mandatory breathes
Mandatory breaths are synchronized with patient’s effort
