Respiratory Flashcards
(45 cards)
Hypercarbia
Retention of CO2
Are you breathing fast or slow with hypercarbia?
Slow
Loss of sensitivity to high levels of CO2
CO2 narcosis
New onset of crackles/decreased breath sounds
Absorption atelectasis
Which O2 delivery device doesn’t provide enough flow to meet total oxygen and air volume?
Nasal cannula
Nasal cannula flow rate
1-6 L/min
Nasal cannula O2 concentration
24-44%
Why doesn’t a flow rate of >6 increase O2 with NC?
Because anatomical dead space is full
What device won’t increase RR or depth?
NC
Simple facemask flow rate
Minimum of 5 L/min
FIO2 of simple facemask
40-60%
Partial Rebreather flow rate
6-11 L/min
Partial rebreather FIO2
60-75%
Exhaled tidal volume with partial rebreather
1/3
Highest O2 level device
Non-rebreather
FIO2 with non-rebreather
> 90%
When is a non-rebreather used?
For unstable pts who will soon be intubated. If they are requiring that much FIO2 they will wear out.
High flow O2 devices FIO2 and flow rate
24-100% at 8-15 L/min
Best device for chronic lung dz
Venturi mask
Which device delivers precise O2 concentration?
Venturi mask
How do pts on venturi mask eat?
Switch to NC
Why are T pieces used most often?
To ensure humidification
Noninvasive positive pressure vents
BiPAP & CPAP
-Keeps alveoli open to improve gas exchange w/out airway intubation
What is BiPAP used for
To keep someone from being intubated or right after they’re extubated