Equipment & Physics Flashcards
What type of gas flow through constriction region (e.g. extrinsic mass in mid-trachea compression)
Orifice flow.
The relationship between intra-alveolar pressure, surface tension, and the radius of alveolus is described by ….. law.
Laplace’s law (T= 1/2 PR)
T: tension
P: pressure
R: Radius
How many litters in a size “E” compressed gas cylinder completely filled with N2O?
1590 L
which method can detect LOW pressure leak in circuit?
Negative-pressure leak test.
Which valve prevent trans filing between compressed-gas cylinders?
Check valve (prevent retrograde flow of gases or between cylinders of high pressure to container with lower pressure).
Whats the purpose of fail-safe valve?
Discontinue of floe of N2O if the O2 pressure within the machine falls below 25 psi.
Which concept used to estimate the volume of gas remaining in a compressed-gas cylinder?
Boyle’s law (for a fixed mass of gas at constant Temp, the product of pressure and volume is constant). (it is what the relation between pressure and volume if temp and amount of gas is constant; inversely related).
measuring of gas volume in remaining compressed gas cylinder by measuring the pressure within the cylinder.
What the pressure and volume of filled O2 tank?
2000 psi with 625L
if the O2 tank reads 1600 psi, how long could O2 be delivered from cylinder at a rate of 2 L/min?
250 minutes (if the pressure is 1600 psi, then the cylinder contains 500 L of O2. dived the volume of 500 over the how many litters per min which is 2-> 500/2 = 250 minutes that you have for the cylinder to be empty at rate of 2L/min) but how did you get the volume of 500L??
