Anesthesia Machine

Question 1

High pressure system begins and ends at..

Answer 1

cylinder–> cylinder regulators

Question 2

Intermediate-pressure system begins at and ends at …

Answer 2

pipeline and ends at flowmeter valves

Question 3

The low-pressure system begins at the…. and ends at the …..

Answer 3

flowmeter tubes and ends at common gas outlet

Question 4

What is SPDD?

Answer 4

Supply
Processing
Delivery
Disposal

Question 5

PISS configurations:
Air:
Oxygen:
Nitrous Oxide:

Answer 5

Air: 1,5
Oxygen: 2,5
Nitrous Oxide: 3,5

Question 6

Pressure change from cylinder to pipeline

Answer 6

1900 psi –> 45 psi

Question 7

Pressure of cylinders:

Answer 7

Air:1900 psi
O2: 1900 psi
Nitrous: 745 psi

Question 8

Max volumes of cylinders:

Answer 8

Air: 625L
Oxygen: 660L
Nitrous: 1590 L

Question 9

How to calculate how many minutes a cylinder will last?

Answer 9

1. How much O2 is in cylinder? –> 660/2000 x Contents remaining (L)/ 500psi
2. Contents remaining / 2L/min. = minutes left

Cross multiply

Question 10

Most delicate part of the cylinder?

Answer 10

cylinder valve

Question 11

O2 pressure failure device:
alarm sounds when pipeline pressure falls below:

Answer 11

28-30 psi

Question 12

What psi would stop the flow of nitrous oxide?

Answer 12

< 20 psi

Question 13

will the oxygen pressure failsafe device detect a flowmeter leak? why?

Answer 13

no, it is upstream of the flowmeters

Question 14

When using nitrous, the proportioning system never lets the O2 to drop below __%

Answer 14

25%

Question 15

Hypoxia prevention safety device will not alarm in the following situations:

Answer 15

oxygen pipeline crossover
leaks distal to flowmeter valves
administration of third gas
defective mechanic or pneumatic components

Question 16

To prevent hypoxic mixture in setting of a cracked flowmeter, the ____ should be positioned closest to the ______ (far ____).

Answer 16

O2
common gas outlet
Far right

Question 17

What circumstance would create the risk of a hypoxic mixture when considering a crack in the flowmeters?

Answer 17

a crack in the O2 meter that is furthest to the right

Question 18

FiO2 calculation:

Answer 18

FiO2 = Air flow rate x 21 +
O2 flow rate x 100 / total flow rate

Question 19

What is the maximum O2 percentage a nasal canulla can deliver?

Answer 19

44% @ 6L

Question 20

Compliance =

Answer 20

Volume / Pressure

Question 21

The Tec 6 vaporizer heats the liquid anesthetic to __ C and pressurizes it to ____ _____.

Answer 21

39
2 atmospheres

Question 22

Tec 6: A lower ambient pressure (higher altitude) requires a ___ setting on the dial.

Answer 22

higher

Question 23

Tec 6: A higher ambient pressure (hyperbaric oxygen tank) requires a ____ setting on the dial.

Answer 23

lower

Question 24

What device would be the first to detect an oxygen pipeline crossover?

Answer 24

oxygen analyzer

Question 25

What to do if the oxygen analyzer alarms?

Answer 25

-best to assume a pipeline crossover has occurred. -turn on oxygen cylinder and disconnect pipeline oxygen

Question 26

Pressing the oxygen flush valve during the _____ cycle can lead to barotrauma.

Answer 26

inspiratory

Question 27

Another problem with using the O2 flush valve is...

Answer 27

it can dilute the partial pressure of volatile agent leading to patient awareness

Question 28

A hole in the bellows may cause _____. A leak in the bellows may cause the reading on the oxygen analyzer to _____.

Answer 28

barotrauma increase

Question 29

The bellows is classified by its movement during _____.

Answer 29

expiration ascending and descending have the letter "e"

Question 30

An ascending bellows _____ during expiration, and a descending bellows ___ during expiration.

Answer 30

rises falls

Question 31

Which is typically the safer kind of bellows? Why?

Answer 31

Ascending The descending bellows cannot continue to rise and fall if there is a circuit disconnect.

Question 32

A ______ bellows will continue to rise and fall if there is a circuit disconect.

Answer 32

descending

Question 33

What type of ventilation reduces the risk of ventilator-associated lung injury?

Answer 33

PCV

Question 34

PCV : if airway resistance rises of lung compliance decreases then the Vt will ____.

Answer 34

decrease

Question 35

which mode will change Vt due to compliance changes?

Answer 35

PCV

Question 36

Good ventilator mode for ARDS

Answer 36

Inverse ratio ventilation more time allocated for inspiration

Question 37

best size of mesh granules for soda lime

Answer 37

4-8

Question 38

Sodal lime contains _____ ____ (strong ____) which neutralizes _____ ____ (strong acid)

Answer 38

sodium hydroxide base carbon dioxide

Question 39

Benefits of calcium hydroxide (Amsorb Plus)

Answer 39

-no carbon monoxide production -very little compound A -lower fire risk its expensive and needs changed more

Question 40

OSHA recommendations for gas exposure:

Answer 40

Nitrous alone = 25 ppm Halogenated agents alone = 2 ppm Halogenated agents + nitrous =less than 0.5 ppm