Lectures 9 - 10 Inhalation Equipment (MC)

Question 1

Essential components of Inhalation Equipment

Answer 1

carrier gas source, pressure regulator, flow meter, vaporizer and mounting bracket, oxygen flush valve, common gas outlet.

Question 2

Primary function of Inhalation Equip

Answer 2

is to deliver anesthetic gases safely and accurately

Question 3

Nitrous oxide is

Answer 3

a carrier gas and an anestheticAlways mixed with O2

Question 4

N2O tanks gauge

Answer 4

does not indicate volume left, must weigh tank to know volume

Question 5

High pressure in full tanks~ ______PSI

Answer 5

1900-2200 PSI

Question 6

Intermediate pressure in pipeline and anesthetic machine

Answer 6

50-55 PSI

Question 7

Pressure regulator function

Answer 7

drops pressure to 50-55 PSI (on tank, along pipeline, inside machine)

Question 8

Oxygen flush valve function

Answer 8

delivers emergency O2. Pressure at 50-55 PSI, high flow 35-75 L/min

Question 9

USA tank color codesGreen? Blue? Yellow?

Answer 9

GREEN = O2BLUE = N2OYELLOW = air

Question 10

Pin index safety system

Answer 10

hanger yoke has gas specific pin distance, and tank shaft has gas specific pin hole distancethis is a safety feature

Question 11

Pipeline connecter

Answer 11

Diameter index safety systemNon-interchangeable Screw Threadthis is a safety feature

Question 12

Non-rebreathing system limbs

Answer 12

Afferent and Efferent Limbs

Question 13

What determines Afferent vs Efferent Reservoir System in a non-rebreathing system

Answer 13

position of the reservoir bag

Question 14

How is CO2 removed in non-rebreathing system

Answer 14

CO2 is removed by flushing effect of FGF, the exhaled gas should NOT return to the patient

Question 15

Which part of the non-rebreathing system contributes to resistance to gas flow

Answer 15

Tubing

Question 16

The longer and thinner the tubing contributes to

Answer 16

higher resistance to gas flow and breathing

Question 17

Does not have and APL valve, has low resistance to breathing

Answer 17

Ayres T piece and Jackson Rees

Question 18

Jackson Rees is used in ______ animals

Answer 18

smaller

Question 19

CO2 removed by chemical reaction (soda lime). Part or all of exhaled gas returns to patient after CO2 removal.

Answer 19

Rebreathing system

Question 20

Where is the reservoir bag located in a rebreathing system

Answer 20

next to the APL valve

Question 21

Ideally the reservoir bag has a volume of

Answer 21

3 - 6 times tidal volume

Question 22

Unidirectional (one-way valves) and CO2 Absorbent – soda lime contributes

Answer 22

contribute to resistance to breathing

Question 23

CO2 Absorbent – soda lime contributes

Answer 23

resistance to breathingThe reaction produces heat, change in pH, and water.

Question 24

How does exhausted soda lime appear

Answer 24

color changeconsistency change ‘regeneration’ (?)

Question 25

When should there be high fresh gas flow?

Answer 25

Start of anesthesia (15-20 min) and end of anesthesia

Question 26

The higher the anesthetic FGF the

Answer 26

shorter the time needed to achieve anesthetic concentration within the system.

Question 27

Use rebreathing system for

Answer 27

large animals and dogs > 7 kg

Question 28

Advantages of rebreathing system

Answer 28

conservation of heat and moisture, less carrier gas waste, less anesthetic gas waste, gas flow can be changed. Less anesthetic use – less environment impact.

Question 29

• Advantages of non-rebreathing system

Answer 29

low resistance, simple construction, no sodalime, no denitrogenation, fast “wash in