Anesthesia Gas Machine Exam 1

Question 1

Ideal Gas Machine

Answer 1

safe
efficient
economical
accurate

Question 2

AANA Standards for CRNA practice includes (4)

Answer 2

1. patient centered high quality consistent anesthesia care
2. assist public to better understand role as CRNA’s
3. foundation for CRNA practice
4. modification of standards (always document modification and why)

Question 3

which standard mentions equipment

Answer 3

standard 6

Question 4

American Society for Testing and Materials (ASTM F1850-00)

Answer 4

1. standard specifications for particular requirements for anesthesia workstations and their components
2. published 2000, updated 2005
3. workstations must have monitors that include: battery backup, high/medium/low priority alarms, required monitors, hanger yokes, PISS, electrical supply cord, flowmeters vaporizers

Question 5

1L Liquid O2 = _____ gas O2

Answer 5

860L

Question 6

pipeline supply, how much supply should be on hand at one given time

Answer 6

primary, secondary, minimum of one day reserve supply needed

Question 7

standard flow rate for O2 and N2O through those systems

Answer 7

100L/min or greater (before regulator)

Question 8

critical temperature

Answer 8

temperature below which a gas is going to be converted to liquid form by pressure

Question 9

critical temperature of oxygen

Answer 9

-118c

Question 10

what does drop in temperature do to molecules of a gas

Answer 10

slows movement (less KE)

Question 11

pipeline tanks are:

Answer 11

temperature controlled, insulated, and pressurized

Question 12

critical temperature of N2O

Answer 12

36.5c

Question 13

pipeline supply specs (4)

Answer 13

1. wall mounted
2. connected to supply hoses
3. filter and check valves
4. check gauges

Question 14

KISS

Answer 14

connects gas hose to wall outlet. unique key connected for each gas

Question 15

DISS

Answer 15

diameter index safety system. each fitting is threaded and has different diameter and internal key unique for each gas. has valve that will shut off gas supply if its disconnected

Question 16

where are floating valves found

Answer 16

where pipeline and AGM meet
inspiratory and expiratory limb of y piece tubing
in vaporizers

Question 17

ball and spring valve example

Answer 17

O2 flush valve

Question 18

diaphragm valve or regulator

Answer 18

reduces pressure in 1st and 2nd stage regulators, helps maintain constant steady flow

Question 19

supply safety systems (4) for pipelines and cylinders

Answer 19

1. color coding
2. PISS (e cylinder)
3. KISS (pipeline)
4. DISS (pipeline)

Question 20

state of O2, N2O and medical air at room temp

Answer 20

O2 exists as gas
N2O exists as gas with liquid overlying
medical air exists as a mixture

Question 21

bourdon pressure gauge

Answer 21

aneroid or without liquid
measures high pressure relative to atmospheric prerssure
expansion or contraction of coiled tube
thin walled tube straightens when exposed to pressure
rises above atmospheric pressure causes tube to slightly uncoil and numeric number on gauge increases

Question 22

safety relief devices for E cylinder

Answer 22

1. woods metal
2. spring loaded valve
3. frangible copper disc

Question 23

woods metal composition

Answer 23

resembles large diameter flathead screw. BLTC. bismuth, lead, tin, cadmium

Question 24

frangible copper disc

Answer 24

will burst when service proceeds pressure by factor of 2

Question 25

cylinder construction

Answer 25

in accordance with DOT
has to be registered with bureau of explosives
medical and anesthetic gases have specification number

Question 26

Cylinder Regulation: DOT

Answer 26

cylinder design
construction
testing
marking
handling
filling
transportation

Question 27

Federal FDS

Answer 27

regulated medical gases contained in cylinders

Question 28

US Pharmacopoeia

Answer 28

sets standards for potency and purity

Question 29

CGA: Compressed Gas Association

Answer 29

sets standards for safe practice

Question 30

National Fire Protection Association

Answer 30

location, construction, installation of bulk systems

Question 31

adiabatic compression ignition

Answer 31

high pressure wave recompresses raising gas temp

Question 32

regulator is composed of

Answer 32

tension springs and diaphragm

Question 33

thorpe tube principle

Answer 33

constant pressure, variable orifice

Question 34

flow through the flowmeter depends on

Answer 34

pressure drop across constriction
size of annular opening
physical properties of gas

Question 35

latent heat of vaporization with volatile agents

Answer 35

temperature of remaining liquid will drop as vaporization proceeds, lowering VP
decreases amount vaporized and saturated VP unless heat is stabilized

Question 36

Vaporizer Components

Answer 36

variable bypass
flow over (liquid volatile agent)
temperature compensated (to compensate for ambient pressures)
agent specific calibration
out of circuit

Question 37

Tec 6 Indicators

Answer 37

warm up (amber, can't turn control dial)
operational (green)
no output (red, vaporizer can't add agent vapor to gas flow due to lack of agent, tilting, or malfunction)
low agent (<250ml in agent sump)
low battery (amber, only powers audible and visible alarms)

Question 38

what is O2 responsible for

Answer 38

proceeds through flow meter
O2 flush valve
activates fail safe
activates low pressure alarm
drives ventilator