Principles Of DNP – Questions & Detailed Answers
Where is the gas mixture of oxygen with other compressed gases and
vaporized anesthetics delivered to in the anesthetic machine? Correct Ans
- common gas outlet (CGO)
What is one thing every anesthesia machine must have? Correct Ans -
scavenging system
Which system includes parts upstream of the first-stage regulator, where
compressed gas pressures are between 45 and 2200 psig? Correct Ans -
high-pressure system
Which system includes parts downstream of the first-stage pressure regulator
and upstream of the gas flow control valves, where pressures are between 16
and 55 psig? Correct Ans - intermediate pressure system
Which system includes all parts downstream of the gas flow control valves,
where pressures are normally slightly greater than atmospheric pressure?
Correct Ans - low-pressure system
What are the pipeline inlets into the anesthesia machine that are gas specific
by national standard and ensure that a pipeline gas hose cannot be connected
to the wrong anesthesia machine gas inlet? Correct Ans - diameter
index safety system (DISS)
All anesthesia machines have cylinder pressure regulators which are often
termed ______________. They reduce the pressure of compressed gases coming
from cylinders at variable pressures of up to 2200 psig, to a constant lower
output pressure, typically 45 psig. Correct Ans - first-stage regulators
When you press the oxygen flush button, how much oxygen is it flushing?
Correct Ans - 35-75L/min of pure oxygen
What reasons can the oxygen flush be used for? Correct Ans - 1. to fill
the breathing system with oxygen to manually ventilate a patient in an
emergency when the workstation is off
2. to fill the breathing system when mask ventilating a patient, but this dilutes
any inhaled anesthetics in the system
, When do you NOT press the oxygen flush valve? Correct Ans - during
positive pressure ventilation
Which control knob is green, fluted, and larger in diameter than the other gas
flow control knobs? Correct Ans - oxygen
Which control knob is smaller, blue, and rigid or knurled, but not fluted like
oxygen knob? Correct Ans - nitrous oxide
Where do you read flow meter? Correct Ans - at the highest and
widest portion of the bobbin, and middle of a ball
When viewing the anesthesia workstation from the front, where should
oxygen flowmeter be? Correct Ans - right side of the flowmeter group
What risk is associated with a dysfunctional flush valve? Correct Ans -
barotrauma
What pressures are gases typically supplied to the machines pipeline
connector inlets at? Correct Ans - 50-55 psig
What is the most important step in the pre-anesthesia check procedure that is
commonly overlooked? Correct Ans - to ensure immediate availability
of a manual means by which the lungs can be ventilated such as resuscitation
bag, and auxiliary tank of oxygen
What is the function of auxiliary oxygen? Correct Ans - can be used as
backup oxygen and used to apply nasal cannula to patient
How is desflurane delivered? Correct Ans - has to be heated because
boiling point is 22.8
What is minimum alveolar concentration (MAC)? Correct Ans - the
concentration that produces immobility in 50% of patients undergoing a
standard surgical stimulus
Where is the gas mixture of oxygen with other compressed gases and
vaporized anesthetics delivered to in the anesthetic machine? Correct Ans
- common gas outlet (CGO)
What is one thing every anesthesia machine must have? Correct Ans -
scavenging system
Which system includes parts upstream of the first-stage regulator, where
compressed gas pressures are between 45 and 2200 psig? Correct Ans -
high-pressure system
Which system includes parts downstream of the first-stage pressure regulator
and upstream of the gas flow control valves, where pressures are between 16
and 55 psig? Correct Ans - intermediate pressure system
Which system includes all parts downstream of the gas flow control valves,
where pressures are normally slightly greater than atmospheric pressure?
Correct Ans - low-pressure system
What are the pipeline inlets into the anesthesia machine that are gas specific
by national standard and ensure that a pipeline gas hose cannot be connected
to the wrong anesthesia machine gas inlet? Correct Ans - diameter
index safety system (DISS)
All anesthesia machines have cylinder pressure regulators which are often
termed ______________. They reduce the pressure of compressed gases coming
from cylinders at variable pressures of up to 2200 psig, to a constant lower
output pressure, typically 45 psig. Correct Ans - first-stage regulators
When you press the oxygen flush button, how much oxygen is it flushing?
Correct Ans - 35-75L/min of pure oxygen
What reasons can the oxygen flush be used for? Correct Ans - 1. to fill
the breathing system with oxygen to manually ventilate a patient in an
emergency when the workstation is off
2. to fill the breathing system when mask ventilating a patient, but this dilutes
any inhaled anesthetics in the system
, When do you NOT press the oxygen flush valve? Correct Ans - during
positive pressure ventilation
Which control knob is green, fluted, and larger in diameter than the other gas
flow control knobs? Correct Ans - oxygen
Which control knob is smaller, blue, and rigid or knurled, but not fluted like
oxygen knob? Correct Ans - nitrous oxide
Where do you read flow meter? Correct Ans - at the highest and
widest portion of the bobbin, and middle of a ball
When viewing the anesthesia workstation from the front, where should
oxygen flowmeter be? Correct Ans - right side of the flowmeter group
What risk is associated with a dysfunctional flush valve? Correct Ans -
barotrauma
What pressures are gases typically supplied to the machines pipeline
connector inlets at? Correct Ans - 50-55 psig
What is the most important step in the pre-anesthesia check procedure that is
commonly overlooked? Correct Ans - to ensure immediate availability
of a manual means by which the lungs can be ventilated such as resuscitation
bag, and auxiliary tank of oxygen
What is the function of auxiliary oxygen? Correct Ans - can be used as
backup oxygen and used to apply nasal cannula to patient
How is desflurane delivered? Correct Ans - has to be heated because
boiling point is 22.8
What is minimum alveolar concentration (MAC)? Correct Ans - the
concentration that produces immobility in 50% of patients undergoing a
standard surgical stimulus
