Lung Protective Ventilation Flashcards
What is the equation for driving pressure?
Driving pressure = Plateau pressure - PEEP
What is the definition of histeresis in regards to the airways?
Histeresis is defined as the dependence of the state of a system based on its history.
In the lungs, it applies to a condition where it is easier to close airways than to open them
Label the Pressure-Volume Loop:
On pressure-volume loop, where is the “safe window”?
Between the upper and lower inflection points
The term for lung overdistension
Volutrauma
The term for lung damage caused by increased pressure, often leading to extra alveolar air
Barotrauma
The term for lung damage caused by repeated alveolar collapse and re-expansion
Atelectrauma
The term for lung damage from inflammatory cytokines/factors
Biotrauma
Which is worse: volutrauma or barotrauma?
Volutrauma
What two components that can be controlled by a ventilator are the highlights of lung protective ventilation? What is usually the consequence?
Low TV and increased RR
Usually means hypercapnia
Under lung protective ventilation, what derangement is expected and permissible to a point?
CO2 (often in the 60s)
In humans, which is more comfortable: pressure or volume control?
Pressure
Label tidal recruitment, normal and over-distension
