DR. KOST ANESTHESIA MACHINE TEST QUESTIONS WITH VERIFIED SOLUTIONS GRADED A+
What do you do if you have an issue with the machine during a case - Answers - trouble shoot
for 30 sec - 1 min
- Take the patient off and bag ventilate
What do you do with a malfunctioning machine - Answers Take out of service
How many more times greater is misuse of the anesthesia gas delivery equipment than
equipment failure - Answers 3x, lack of familiarity with the equipment and a failure to check
machine function are the most frequent causes
What kind of gas is in the respiratory reserve bag - Answers Not fresh gas, still has CO2
What agency sets the regulation for anesthesia machines - Answers ASTM (American Society
for Testing and Materials) 1850,
Compressed gas is delivered in two ways - Answers Compressed gas and via pipeline
How is O2 manufactured by - Answers Fractional distillation of liquified air. This is the most
common method.
N2O is manufactured by - Answers The thermal decompensation of ammonium nitrate. Must
contain 99% N20 by volume
How are O2 and N20 stored - Answers O2 is stored as a gas and N2O is stored as a liquid
-N2,O2,air gas form
-CO2 - liquid
Compressed gas purity is regulated by who - Answers Pharmacopeia of the United States (USP)
The transportation of compressed gas is regulated by who - Answers Department of
transpiration (DOT) - the motor safety devision
-DOT regulates everything about cylinders (thickness, construction, etc)
Tanks on the side of machine are used for what - Answers Emergency and mobility (somewhere
that does not have pipeline availability)
Where are the valves on a cylinder - Answers Attached to the neck of the cylinder via tapered
thread
Oxygen cylinder port is where - Answers the gasses exit the cylinder from (point of exit)
Pressure relief device type - Answers Disc device - a fragile disc or burst disc, predetermined
,pressure is reached then the disc ruptures and the contents are dispersed, all or nothing
phenomenon
Fusible plug (woods metal) - bismuth, tin, cadmium, and lead, low melting point, temp softens
plug with resultant loss of cylinder contents, plug melts, all or nothing phenomenon.
Pressure relief valve - opens at extreme pressures, spring loaded device designed to reclose
and prevent gas escape once the condition returns to normal, not a all or nothing phenomenon.
Safest device
Conical depression - Answers Receives retaining screw
What is the PSI of a full O2 tank - Answers 1900 - 2200 (2000) = 660L
What is the PSI of a full N2O tank - Answers 750 - 745 = 1590l
Difference between gas and liquid in cylinder tanks - Answers Gas psi will decrease when
volume decreases
Liquid psi will stay the sakes until liquid is gone
What is the only way to tell how much is left in a N2O tank - Answers weigh it
you have 1000 psi in your O2 tank going at 6l how many minutes do you have left - Answers
1000 psi approximately 330L
330L/6L flow = 55 min
Cylinder markings and labeling - Answers - not supposed to be painted over, legible, do not
cover, required by DOT, must bear a label 2/3 the distance from the cylinder bottom, have to
check O2 cylinders every 2 years
How often do you have to check cylinders - Answers - Inspection and internal hydrostatic
pressure test every 5 years, with special permit testing is performed every 10 yrs, tested to 1.66
of their service pressure
- an old test for this was the cylinder hammer ring test
What is the purpose of the pin index safety system - Answers prevent interchangeability of
cylinders on the cylinder yoke, two pins on the yoke correspond with two holes on the cylinder
valve
Combinations to O2, N2O, Air, CO2 pin index safety system - Answers Air - 1,5
, O2 - 2,5
N2O - 3,5
CO2 - 1,6
What material are hospital pipeline made out of - Answers Copper
The pressure in the anesthesia machine is 2000 psi (T or F) - Answers False
What does the DISS prevent - Answers interchangeability of gas hoses
Pipe line systems - Answers Primary source for the anesthesia gas machine
- At 50 psi at
- cylinder pressure is at 45 psi
- anesthesia machine will high to low pressure
- turn off cylinders after machine check
Diameter index safety system (DISS) - Answers Every gas has a different threading
The anesthesia machine high pressure side is exposed to the wall flow or cylinder flow -
Answers Cylinder flow
-hanger yoke
-yoke block
-cylinder pressure gauge
-cylinder pressure regulator
what is the function of the cylinder crush gasket - Answers prevent leaking, reduces frictional
flow
What type of valve is in a hanger yoke valve - Answers floating check valve, prevents transfixing
of tanks
First stage regulator - Answers - on the high pressure side
- also known as a pressure reducing valve, reducing regulator or regulator valve
- connects a gas from a variable pressure within the gas cylinder to a lower more constant
working pressure suitable for use in the anesthesia machine
What is inside a first stage regulator - Answers - Valve seat
What do you do if you have an issue with the machine during a case - Answers - trouble shoot
for 30 sec - 1 min
- Take the patient off and bag ventilate
What do you do with a malfunctioning machine - Answers Take out of service
How many more times greater is misuse of the anesthesia gas delivery equipment than
equipment failure - Answers 3x, lack of familiarity with the equipment and a failure to check
machine function are the most frequent causes
What kind of gas is in the respiratory reserve bag - Answers Not fresh gas, still has CO2
What agency sets the regulation for anesthesia machines - Answers ASTM (American Society
for Testing and Materials) 1850,
Compressed gas is delivered in two ways - Answers Compressed gas and via pipeline
How is O2 manufactured by - Answers Fractional distillation of liquified air. This is the most
common method.
N2O is manufactured by - Answers The thermal decompensation of ammonium nitrate. Must
contain 99% N20 by volume
How are O2 and N20 stored - Answers O2 is stored as a gas and N2O is stored as a liquid
-N2,O2,air gas form
-CO2 - liquid
Compressed gas purity is regulated by who - Answers Pharmacopeia of the United States (USP)
The transportation of compressed gas is regulated by who - Answers Department of
transpiration (DOT) - the motor safety devision
-DOT regulates everything about cylinders (thickness, construction, etc)
Tanks on the side of machine are used for what - Answers Emergency and mobility (somewhere
that does not have pipeline availability)
Where are the valves on a cylinder - Answers Attached to the neck of the cylinder via tapered
thread
Oxygen cylinder port is where - Answers the gasses exit the cylinder from (point of exit)
Pressure relief device type - Answers Disc device - a fragile disc or burst disc, predetermined
,pressure is reached then the disc ruptures and the contents are dispersed, all or nothing
phenomenon
Fusible plug (woods metal) - bismuth, tin, cadmium, and lead, low melting point, temp softens
plug with resultant loss of cylinder contents, plug melts, all or nothing phenomenon.
Pressure relief valve - opens at extreme pressures, spring loaded device designed to reclose
and prevent gas escape once the condition returns to normal, not a all or nothing phenomenon.
Safest device
Conical depression - Answers Receives retaining screw
What is the PSI of a full O2 tank - Answers 1900 - 2200 (2000) = 660L
What is the PSI of a full N2O tank - Answers 750 - 745 = 1590l
Difference between gas and liquid in cylinder tanks - Answers Gas psi will decrease when
volume decreases
Liquid psi will stay the sakes until liquid is gone
What is the only way to tell how much is left in a N2O tank - Answers weigh it
you have 1000 psi in your O2 tank going at 6l how many minutes do you have left - Answers
1000 psi approximately 330L
330L/6L flow = 55 min
Cylinder markings and labeling - Answers - not supposed to be painted over, legible, do not
cover, required by DOT, must bear a label 2/3 the distance from the cylinder bottom, have to
check O2 cylinders every 2 years
How often do you have to check cylinders - Answers - Inspection and internal hydrostatic
pressure test every 5 years, with special permit testing is performed every 10 yrs, tested to 1.66
of their service pressure
- an old test for this was the cylinder hammer ring test
What is the purpose of the pin index safety system - Answers prevent interchangeability of
cylinders on the cylinder yoke, two pins on the yoke correspond with two holes on the cylinder
valve
Combinations to O2, N2O, Air, CO2 pin index safety system - Answers Air - 1,5
, O2 - 2,5
N2O - 3,5
CO2 - 1,6
What material are hospital pipeline made out of - Answers Copper
The pressure in the anesthesia machine is 2000 psi (T or F) - Answers False
What does the DISS prevent - Answers interchangeability of gas hoses
Pipe line systems - Answers Primary source for the anesthesia gas machine
- At 50 psi at
- cylinder pressure is at 45 psi
- anesthesia machine will high to low pressure
- turn off cylinders after machine check
Diameter index safety system (DISS) - Answers Every gas has a different threading
The anesthesia machine high pressure side is exposed to the wall flow or cylinder flow -
Answers Cylinder flow
-hanger yoke
-yoke block
-cylinder pressure gauge
-cylinder pressure regulator
what is the function of the cylinder crush gasket - Answers prevent leaking, reduces frictional
flow
What type of valve is in a hanger yoke valve - Answers floating check valve, prevents transfixing
of tanks
First stage regulator - Answers - on the high pressure side
- also known as a pressure reducing valve, reducing regulator or regulator valve
- connects a gas from a variable pressure within the gas cylinder to a lower more constant
working pressure suitable for use in the anesthesia machine
What is inside a first stage regulator - Answers - Valve seat
