Test 1 Ch.3 How a Breath is Delivered Flashcards
What are the mandatory volume controlled settings
- volume (Vt)
- RR
- Fio2
- PEEP
- Flow
In volume control the….
volume and flow is controlled and pressure varies
_____ and _______ waveforms will stay ___________, while ____________ waveform change based on _______ ______________
Vt
flow
constant
Pressure
lung mechanics
What is a benefit of volume-control that is guaranteed?
Minute ventilation. B/c of Ve=RR x Vt (those 2 settings are already set)
What mode is the easiest mode to normalize or correct ABGs?
Volume control
In pressure control, the
pressure is controlled and volume and flow vary based on lung mechanics
What mandatory settings are set in pressure control (5)
- inspiratory pressure ( can use this to manipulate Vt)
- RR
- Fio2
- PEEP
- I-time (inspiratory time)
In pressure control you set the
I-time and the pt can do whatever flow they want throughout the i-time that was set
What is the difference between volume and pressure control?
Volume: Vt and flow is controlled and pressure varies
Pressure: pressure is controlled and Vt and flow varies
On a generic screen on the ventilator, there are 3 waveforms: volume, pressure, and flow. If a pt is in a volume-controlled mode, what 2 of the 3 waveforms will remain constant and which waveform will change?
- Volume and flow will remain constant
- Pressure will change based on lung mechanics
Because the pressure varies in volume-control, what risks can come from that?
Barotrauma
What is peak Flow normal range?
40- 80
Where do we normally start with Flow?
60
In pressure control, the VE….
varies over the breaths
What are other names for Pressure-controlled ventilation?
- Pressure-targeted ventilation
- Pressure ventilation
What are other names for Volume-controlled?
- Volume-targeted ventilation
- Volume ventilation
pressure controller, the vent maintains the same pressure waveform at the……
mouth regardless of changes in lung characteristics
volume controller, ventilator volume delivery, and volume waveform remain…
What’s measured?
constant and are not affected by changes in lung mechanics. Volume is measured
Flow controller, ventilator volume delivery, and flow waveform remain…
What is measured?
constant and are not affected by changes in lung mechanics. Flow is measured
In Time controller, the pressure, volume and flow curves can…
change as lung characteristics change. Time remains constant
What is flow?
How fast will a pt get the volume that is set
When the vent maintains the pressure waveform in a specific pattern, the breathing is described as…..
Pressure-controlled
What is the most common cycling mechanism in the pressure support mode?
Flow cycling
What are the two most common patient-triggering variables?
Pressure and flow
