Exam 4: Lecture 1 Flashcards
how long does battery backup on your electrical supply of anesthesia machine last?
at least 30 mins, maybe 90 in newer models
highlighted components of the anesthesia machine
high/low pressure gas sources
regulators/manifolds
flowmeters, valves, floats
vaporizers
proportioning systems
pressure failure safety devices
fail-safe devices
ventilator
CO2 absorbent
anesthesia circuits
pneumatic and electronic alarm devices
what gas does not have to pass through a fail-safe valve before going to the flowmeter?
oxygen
where is oxygen positioned with other medical gases?
last, added last to avoid hypoxic mixture
what are the five tasks of oxygen?
proceeds to and supplies the flowmeter
powers the oxygen flush valve
activates fail-safe mechanisms
activates the low oxygen pressure alarms
compresses the bellows for mechanical ventilation
what is the most fragile part of the machine and is suceptible to breakage, leaks, and inaccuracy?
flowtubes
what pressure does the oxygen flush valve deliver oxygen to the patient?
50 psi
35-75L
the hypoxic guard chain link between the N2O and O2 flowmeters ensures a minimum FiO2 of:
25%
3:1 ratio
what is the pin index safety system?
system that connects high-pressure medical gas cylinders on the back of the anesthesia machine
how does the PISS prevent mixups?
uses a unique configuration of holes and pins on the valve and yoke to ensure the correct cylinder is connected to the correct regulator valve
hospital pipeline fresh gas supply regulators reduce pipeline supply to what psi before entering the anesthesia machine?
50 psi
what is the diameter index safety system?
system of hoses from the wall or boom with quick coupler o-rings and springs that are color coded and different sizes to help prevent connection of the wrong gas to the wrong spot on the anesthesia machine
in the DISS what is present at the pipeline inlet?
filter, check valve and pressure gauge
what is the failsafe valve?
N2O and air must travel pas a failsafe valve that is held open by the O2 pressure of the anesthesia machine
what happens if the oxygen pressure falls and triggers the failsafe valve?
N2O and air flow will stop
what is the purpose of the failsafe valve?
to prevent a hypoxic mixture from being delivered to the patient
problems with opening the oxygen flush valve while attached to your patient?
baro or volutrauma
dilute your anesthetic
when will the low oxygen pressure alarm trigger?
if the high-pressure oxygen source falls below 30 psi
what drives the pneumatic bellows?
oxygen
usually, rarely medical air
