Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
11 Cards in this Set
- Front
- Back
|
How much PEEP does the ventilator relief valve provide in ascending bellows?
|
2.5 cm H2O PEEP
|
|
|
Why does the ventilator relief valve provide PEEP?
|
Makes sure bellows fill before gas goes to the scavenging system
|
|
|
How does the PEEP valve work on the ventilator?
|
As the control is rotated, a magnet moves closer to/farther from a magnetic valve. Thus, as flow/pressure falls, the magnets attract, providing back pressure/closing the valve
|
|
|
What is your SaO2 at a PaO2 of 60 mmHg?
|
90%
|
|
|
Describe the pressure limit control
|
If PIP > spring pressure, valve opens and driving gas is vented to atmosphere -> bellows stop moving
|
|
|
Descrie Piston ventilators
|
Minimal/no pneumatic O2 needed, Electronically controlled, very accurate TV< esp w/ pts w/ poor compliance, more modes (CMV, SIMB, PCV, PSV), no mandatory peed
|
|
|
Which machines have piston ventilators?
|
NAD 6000, 6400, Fabius (only visible on the Fabius)
|
|
|
Why fresh gas decoupling?
|
Because FGF adds to tidal volume during inspiration -> potential for barotrauma, esp. in kids
|
|
|
How does fresh gas decoupling work in NAD machines?
|
During inhalation, FGF is diverted to the resevoir bag by a decoupling valve b/t the FGF and ventilator circuit. On inspiration, negative pressure relief valve opens and entrains room air if resevoir contents+exhaled gasses are insufficient to fill bellows.
|
|
|
What happens on NAD machines if the bag isn't on?
|
Entrainment of room air -> dilution of anesthetic.
|
|
|
How does Ohmeda do compensation for FGF?
|
D-lite sensors just before patient adjust delivered TV to preset TV. (Don't throw these away).
|
