AGM Flashcards
Joule Thompson effect
When compressed gas is released into free space the process is adiabatic and cooling occurs
O2 tank psi and L
600L
1900 psi
Nitrous oxide tank numbers
1600 L
750 psi
02 tank numbers
660 L
2000psig
Nasal cannula <5L/min conversion to fio2
1 L/min flow rate can increase FiO2 to 24%,
2 L/min to 28%,
3 L/min to 32%,
4 L/min to 36%,
5 L/min to 40%,
and 6 L/min to 44%.
This may be changing, new studies say inspiration flow rate has a greater impact on fio2 than NC flow rate for low flow O2 delivery
Material of MRI safe O2 tanks
Aluminum, apparently its non-ferrous
How many mcg/ml in 1:100,000
10 mcg/ml
How many mcg in 1:200,000
5 mcg/ml
How many mcg in 1:1,000,000
1 mcg/ml
Example of Boyles law
Bag mask ventilation
Pressure and volume
Standardization acronym for pipeline gas
DISS
Standardization acronym for cylinder attachments
PISS
Henrys law
Amount of dissolved gas in a liquid is directly proportional to the partial pressure of the gas above it
Carbonation-opening a beer… the gas in the beer wants to equilibrium with the new atmosphere
Henry Heineken
Rough estimate of paO2 based on fio2
PaO2=5xfiO2
Alveolar gas equation
(Pb-Ph2o) FiO2-PaCO2/R=PAO2
R=ratio of o2/co2 being produced
Pb=atmospheric (760)
PH20=47
Calculating TV
IBW* 7ml/kg
Calculating IBW
W: 100+(5lbs per inch over 5 ft)
M: 105 + (6lbs per inch over 5 ft)
Joule Thompson effect
Joule is cool
adiabatic cooling-property of gas changing temp with change in pressure
Atmospheric pressure equivalents
1atm
760mmHg
14.7 PSI
101.3 kilopascals
29.9 inches of mercury
1 bar
Dalton’s law
Dalton was a math nerd, he loved to add
Gay-Lussacs
Volume constant
Pressure is directly proportional to temperature
Exploding O2 tanks in hot rooms
Ideal gas law
C
Very
Big
Pool
Go
Topless
Around the triangle to the left
Venturi effect
Fluid flowing through constriction undergoes a decrease in pressure
Latent heat of vaporization
Amount of energy consumed by a liquid as its converted to a vapor
What the volume percent at 1 atm?
Vapor pressure of iso=240 mmHg
=240/760*100= 31.4%
Oops I made a mistake… high vapor pressure agent in low pressure vaporizer, what happens?
Why is Tech 6 heated and pressurized?
To maintain output consistency
Flow meter FiO2 calculation
ML of liquid anesthetic per hour calculation
=volume% * FGF(L/min)* 3
Fail safe function
Oxygen pressure failure device
-alarms in setting of depleted tank, drop in pipeline pressure or disconnected oxygen hose
-resides in intermediate pressure system
