Exam 4: Lecture 1

Question 1

how long does battery backup on your electrical supply of anesthesia machine last?

Answer 1

at least 30 mins, maybe 90 in newer models

Question 2

highlighted components of the anesthesia machine

Answer 2

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

Question 3

what gas does not have to pass through a fail-safe valve before going to the flowmeter?

Answer 3

oxygen

Question 4

where is oxygen positioned with other medical gases?

Answer 4

last, added last to avoid hypoxic mixture

Question 5

what are the five tasks of oxygen?

Answer 5

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

Question 6

what is the most fragile part of the machine and is suceptible to breakage, leaks, and inaccuracy?

Answer 6

flowtubes

Question 7

what pressure does the oxygen flush valve deliver oxygen to the patient?

Answer 7

50 psi
35-75L

Question 8

the hypoxic guard chain link between the N2O and O2 flowmeters ensures a minimum FiO2 of:

Answer 8

25%
3:1 ratio

Question 9

what is the pin index safety system?

Answer 9

system that connects high-pressure medical gas cylinders on the back of the anesthesia machine

Question 10

how does the PISS prevent mixups?

Answer 10

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

Question 11

hospital pipeline fresh gas supply regulators reduce pipeline supply to what psi before entering the anesthesia machine?

Answer 11

50 psi

Question 12

what is the diameter index safety system?

Answer 12

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

Question 13

in the DISS what is present at the pipeline inlet?

Answer 13

filter, check valve and pressure gauge

Question 14

what is the failsafe valve?

Answer 14

N2O and air must travel pas a failsafe valve that is held open by the O2 pressure of the anesthesia machine

Question 15

what happens if the oxygen pressure falls and triggers the failsafe valve?

Answer 15

N2O and air flow will stop

Question 16

what is the purpose of the failsafe valve?

Answer 16

to prevent a hypoxic mixture from being delivered to the patient

Question 17

problems with opening the oxygen flush valve while attached to your patient?

Answer 17

baro or volutrauma
dilute your anesthetic

Question 18

when will the low oxygen pressure alarm trigger?

Answer 18

if the high-pressure oxygen source falls below 30 psi

Question 19

what drives the pneumatic bellows?

Answer 19

oxygen
usually, rarely medical air