Test 1: 8 anethesia machine

Question 1

most anesthetic machines will contain:
— + —= delivery to patient

Answer 1

carrier gas source (O2)

inhalant volatization method

Question 2

Answer 2

Question 3

compressed oxygen can be stored as

Answer 3

gas cylinders
liquid oxygen
oxygen concentrator

Question 4

safty connection of E cylinders

Answer 4

PISS (pin index safety system): prevents connecting the wrong type of gas to the machine

Fusible plug- prevents over pressurization due to increased temp

Question 5

a full E tank has

Answer 5

660 L= 2200 psi

Question 6

a full H tank has

Answer 6

6900 L= 2200 psi

Question 7

Nitrous oxide tank will read — psi

Answer 7

745

will remain pressurized within the tank until the entire liquid phase is gone

measure how much is left by weighing the tank

NO is stored as liquid and gas (95% liquid when full)

Question 8

liquid oxygen is stored at — °C

Answer 8

-160 (is a liquid at this temp)

is then pumped through hospital in pipes at 58 psi

Question 9

oxygen concentrators work by

Answer 9

concentrating O2 in room air into 90-95% O2 at 25 psi

1-4 L/min: not strong enough to ventilate off of

Question 10

pressure regulators will drop psi from — to —

Answer 10

2200 psi (from O2 tank) (high pressure)

45-50 psi (guarantees constant pressure in the flowmeter) (intermediate pressure)

Question 11

what kind of pipelines can connect to O2 lines

Answer 11

DISS (diameter index safety system)

Manufacturer-specific connectors

prevents attaching to wrong gas

Question 12

O2 flush valve

Answer 12

connects the 50 psi pipeline coming from regulator or pipeline inlet to the fresh gas outlet, bypassing the flowmeter

O2 coming out has 50 psi, 35-75 L/min → risk of barotrauma

Question 13

O2 flush valves bypass — and produce O2 at — psi

Answer 13

flowmeter

50 psi, 35-75 L/min

go from regulator (midpressure) to fresh gas outlet

risk of barotrauma

Question 14

flowmeter allows precise delivery of gas to — and —

Answer 14

vaporizer and common gas outlet

Question 15

flow meter drops pressure to —

Answer 15

low (14.7 psi)

goes from tank(2200-high)
regulator (50- mid)
flowmeter (14.7-low)

Question 16

Answer 16

vaporizer

Question 17

vaporizer can either be — or —

Answer 17

out of the anesthetic breathing circuit (VOC)

within the anesthetic circle (VIC)

Question 18

current vaporizers are —

Answer 18

a) Concentration calibrated, variable bypass
b) Flow over
c) VOC (out of the breathing circuit)
d) Temperature, flow and back pressure compensated
e) Agent specific
f) High resistance

Question 19

how do current variable bypass vaporizers componsate for changes in temp

Answer 19

thermostability of copper and bronze
bimetallic strip
electrical heating device

compensates for cooling changing the rate of vaporization

Question 20

desflurane vaporizer

Answer 20

desflurane boils at 23C (close to room temp)

to avoid this problem, it is comprelelty transformed in gas by increasing the inside temp to 39C

Question 21

Answer 21

negative pressure relief valve

prevents breathing against a flat bag
allows ambient air in when gas flow is inadequate

Question 22

Answer 22

common gas outlet- recieves all gases of the machine and delivers it to the patient

machine built to prevent accidental disconnection

Question 23

why use medical air or helium O2

Answer 23

to reduce O2 in surgical field- if using laser- prevent fire

if long procedure- to reduce reactive O2 species formation