Anesthesia Gas machine

Question 1

High Pressure components

Answer 1

Hanger Yoke
Yoke block w/ check valves
Cylinder pressure gauge
Cylinder pressure regulator

Question 2

Intermediate Pressure components and psi

Answer 2

Begins at pipeline and ends at flowmeter valves

pipeline inlets
pressure gauges
O2 pressure failure device
O2 second stage regulator
O2 flush valve
Ventilator power inlet
Flowmeter valves

Question 3

Low Pressure components

Answer 3

Flowmeter tubes (Thorpe)
Vaporizers
Check valve
Common Gas outlet

Question 4

What does the low-pressure leak test assess?

Answer 4

the integrity of the low-pressure circuit from flowmeter valves to common gas outlet

Question 5

High pressure leak test assesses the integrity of the….

Answer 5

low-pressure system and the breathing circuit

Question 6

What are the 5 Tasks of O2 in the SPDD Model

Answer 6

1. O2 pressure alarm
2. O2 pressure failure devices
3. O2 Flowmeter
4. O2 Flush valve
5. Ventilator drive gas

Question 7

What does the PISS prevent?

Answer 7

Connecting the wrong cylinder to the anesthesia machine

Question 8

PISS configurations (Air, O2, Nitrous Oxide)

Answer 8

Air = 1, 5
O2 = 2, 5
Nitrous = 3,5

Question 9

What does the DISS system prevent?

Answer 9

Wrong gas hose connected to AGM

Question 10

Cylinder Pressure of Air, O2 and NO2

Answer 10

Air = 1,900 psi
O2 = 1,900 psi
Nitrous Oxide = 745 psi

Question 11

Max Volume of cylinders

Answer 11

Air = 625 L
O2 = 660 L
Nitrous Oxide = 1,590 L

Question 12

Equation for how much O2 is in cylinder

Answer 12

Tank capacity (L) / Full tank pressure (psi)
X
Contents remaining (L) / Gauge pressure (psi)

Question 13

How long will tank last? (equation)

Answer 13

Contents remaining (L) / FGF rate (L/mnin)
=
Minutes before tank expires

Question 14

Oxygen pressure failure device (failsafe) will not….

Answer 14

WILL NOT alarm with O2 pipline crossover (measures pressure, NOT O2 concentration)

Question 15

Oxygen pressure failure device (failsafe) will….

Answer 15

Will alarm when O2 tank is depleted, drop in O2 pipeline pressure, or dissconnected O2 hose

Question 16

How to calculate FiO2

Answer 16

Question 17

How to calculate O2 Flow Rate (L/min)

Answer 17

Add 4% for each liter after 1L being 24% to a max of 44% (6L)

Question 18

To ensure precise vaporizer output, the desflurane vaporizer heats the liquid anesthetic to ______ and __________.

Answer 18

39 C
pressurizes it to 2 atmospheres

Question 19

The Tec 6 vaporizer does not ________.

Answer 19

does not compensate for changes in elevation

Question 20

A ________ requires a higher setting on the dial of the Tec 6 vaporizer.

Answer 20

Lower ambient pressure (higher altitude)

Question 21

A _________ requires a lower setting on the dial in a Tec 6 vaporizer.

Answer 21

higher ambient pressure (hyperbaric oxygen tank)

Question 22

What is the FINAL defense against delivery of a hypoxic mixture?

Answer 22

Oxygen Analyzer!!!

-its the only device that measures O2 concentration

Question 23

Variable bypass method of vaporization?

Answer 23

Flow over

Question 24

Tec 6 Desflurane method of vaporization?

Answer 24

Gas/Vapor blender (heat generates vapor that is injected into the fresh gas)

Question 25

Steps if you have O2 pipeline failure.

Answer 25

1. turn on O2 cylinder and disconnect pipeline O2 supply 2. verify if O2 concentration is increasing, IF NOT, then ventilate the pt w/ ambu bag connected to a DIFFERENT O2 tank (you will also need to convert to a TIVA(you no longer have gas since you are no longer using the AGM)

Question 26

Oxygen flush valve O2 flow

Answer 26

35-75 L/min

Question 27

Oxygen flush valve O2 pressure

Answer 27

50 psi

Question 28

The mechanical spill valve is ________ during the inspiratory phase. Pressing the O2 flush during inspiratory phase will.......

Answer 28

Closed! transfer this pressure to pts lungs ...... BAROTRAUMA!

Question 29

Ascending bellows _______ during expiration.

Answer 29

Rise -Safer since if there is a circuit disconnect they will not continue to rise and fall.

Question 30

Descending bellows _______ doing expiration.

Answer 30

Fall

Question 31

VCV setting

Answer 31

preset TV over a predetermined time -Fixed = TV, inspiratory flow rate and inspiratory time Variable= PIP

Question 32

PCV setting

Answer 32

-preset inspiratory pressure over a predetermined time Fixed = PIP and inspiratory time Variable = TV and inspiratory flow

Question 33

T-burg will ______Vt.

Answer 33

decrease from decreased compliance

Question 34

When is PCV better than VCV?

Answer 34

Question 35

1st and 2nd most common causes of low pressure in circuit?

Answer 35

1. circuit disconnect 2. co2 absorbent canister has poor seal or defective

Question 36

Semi-open breathing circuit

Answer 36

FGF>minute ventilation

Question 37

semi-closed breathing circuit

Answer 37

FGF< minute ventilation

Question 38

Most common circle system related causes of rebreathing

Answer 38

-Incompetent unidirectional valve -Exhausted CO2 absorbent

Question 39

Malfunction of unidirectional valves = ?

Answer 39

the space between the y-piece and the valve to be dead space (risk of hypercarbia)

Question 40

Best circuit for spontaneous ventilation? Worst?

Answer 40

Mapleson A (B is the worst)

Question 41

Best circuit for controlled ventilation? Worst?

Answer 41

Mapleson D (A is the worst)