Anesthesia Machine Flashcards
How much is in a full O2 tank?
660L
1900 psi
How much is in a full air tank?
625 L
1900 psi
How much is in a full N2O tank?
1590 L
745 psi
How long will your O2 tank last if has 500 psi remaining running at 2L/min?
87 min
What is the weight of a nitrous tank when it’s full? Empty?
20.7lbs
14.1lbs
Equation for Reynold’s Number
(Diameter x Density x Velocity) / (Viscosity)
Using flowmeters, if the pt is on 1L/min air and 3 L/min O2, what is the FiO2?
((1 x 21) + (3 x 100)) / 4 (total liters)
With fresh gas coupling, the total Vt delivered to the pt =?
Vt set on ventilator + FGF during inspiration - volume lost to compliance
liquid anesthetic usage equation
Vol % x FGF(L/min) x 3
does a variable bypass vaporizer need to be calibrated for elevation?
no
Which device will be the FIRST to detect an oxygen pipeline crossover?
oxygen analyzer
The oxygen analyzer resides in what limb of the breathing circuit?
inspiratory
What 2 functions does the drive gas on a pneumatic ventilator serve?
- It compresses the bellows
- It opens & closes the ventilator spill valve
What is the position of the ventilator spill valve during inspiration?
Closed (ensures Vt goes to pt not scavenger)
What is the minimum expiratory pressure needed to open the ventilator spill valve?
3 cmH2O
On a pneumatic ventilator, a hole in the bellows may cause?
barotrauma
In a pneumatic ventilator, what might a leak in the bellows cause?
the reading on the oxygen analyzer to increase
The piston/pneumatic ventilator preserves tank oxygen in the event of oxygen pipeline failure?
Piston
Which ventilator allows for more precise delivery of tidal volumes?
Piston
At what pH does ethyl violet change to purple?
when it falls below 10.3
How much CO2 can soda lime absorb?
26L of CO2 per 100g of absorbent
What is the mesh size in soda lime?
4-8
Which component of the scavenging system determines if it’s an open or closed system?
The scavenging interface
What are 4 ways to detect circuit disconnect?
- pressure
- volume
- EtCO2
- vigilance
According to the US Department of Transportation, the gas cylinder label must include:
- date of last inspection
- serial number
How much in full tank of CO2?
1,590 L
838 psi
