Anesthesia Machine Flashcards
What is the minimum O2%
30-35%
What is the metabolic requirement for oxygen (minimum O2 flow)
5-10 mL/kg/min
What is the color code for oxygen, nitrous and medical air cylinders
O2 = green
N2O = blue
Med Air = yellow
Capacity and Pressure of E Cylinder
660L at 2200 psi
What is Boyle’s Law
P1V1 = P2V2
What is the calculation to figure out remaining O2
(2200 psi/660L) = (psi left on tank/X Liters)
T/F: N2O is in both gas and liquid form and the gauge only reads gas pressure so the remaining can’t be calculated
True
What does the regulator do
Decreases tank pressure to 50 psi – prevents pressure fluctuations as tank empties
What does the flowmeter do and what is the psi at the bottom and top
Controls rate of gas flow through vaporizer
Enters at 50 psi and exits at 15 psi
Where is the flowmeter read on a ball or bobbin
Middle of ball
Top of bobbin
What does the quick flush do and at what rate does it deliver gas
Delivers O2 from area of 50 psi and bypasses vaporizer, no anesthetic
35-75 L/min rate
When should the quick flush be used
Emergency or recovery
What does the vaporizer do
Changes liquid anesthetic into vapor
Examples of Vapor and Gas
Vapor = Isoflurane Gas = N2O, Xenon
What is vapor pressure
Pressure exerted by vapor molecules when liquid and vapor phases are in equilibrium
