Capter 4 Key Terms

Question 1

Anesthetic Chambers

Answer 1

clear, aquarium-like box used to induce general anesthesia in small patients

Question 2

Anesthetic mask

Answer 2

cone-shaped device used to administer oxygen and anesthetic gas to non-tubed patients

Question 3

Anesthetic vaporizer

Answer 3

anesthetic machine that vaporizes liquid inhalant anesthetic and mixes it with a carrier gas

Question 4

Asphyxiation

Answer 4

act of cutting off oxygen supply

Question 5

Atelectasis

Answer 5

Collapse of a portion of all of one or both lungs

Question 6

Ayre’s T piece

Answer 6

non rebreathing circuit with a fresh gas inlet entering at the patient end of the breathing tube at 90* angle and without a reservoir bag at the opposite end of the breathing tube

Question 7

Bain coaxial circuit

Answer 7

non rebreathing circuit with a “tube within a tube” configuration that discharges fresh gas at the opposite end of the breathing tube

Question 8

Breathing circuit

Answer 8

anesthetic machine that conveys the carrier gases and inhalant anesthetic to the patient and removes exhaled CO2

Question 9

Carbon dioxide absorber canister

Answer 9

canister that holds CO2 absorbent granules

Question 10

Closed rebreathing circuit

Answer 10

system in which the pop off valve is kept nearly or completely closed and oxygen flow is low

Question 11

Common gas outlet

Answer 11

where O2, inhalant anesthetic, and N2O exit the anesthetic machine

Question 12

Compressed gas cylinders

Answer 12

container that holds a large volume of pressurized gas

Question 13

Compressed gas supply

Answer 13

system that supplies carrier gases

Question 14

Endotracheal tube

Answer 14

tube placed in patients trachea used to transfer anesthetic gas directly from the breathing circuit into the patients trachea

Question 15

Flow meter

Answer 15

glass cylinder that indicates the carrier gas flow

Question 16

Fresh gas inlet

Answer 16

point where carrier and anesthetic gas enter the breathing circuit

Question 17

Jackson-Rees Circuit

Answer 17

a non rebreathing circuit with a fresh gas inlet at the patient end of the breathing tube and a reservoir bag at the opposite end

Question 18

Lack circuit

Answer 18

a non rebreathing circuit

Question 19

Laryngoscope

Answer 19

device used to increase visibility of the larynx during ET tube placement.

Question 20

Line pressure gauge

Answer 20

indicates the pressure in the intermediate pressure gas line between the pressure reducing valve and the flow meters.

Question 21

Magill Circuit

Answer 21

a non rebreathing circuit with an overflow valve at the patient end of the breathing tube

Question 22

Mapleson classification system

Answer 22

developed to classify non rebreathing circuits based on position of fresh gas inlet, reservoir bag, and pressure limiting valve

Question 23

Non rebreathing system

Answer 23

machine fitted with a non rebreathing circuit

Question 24

Norman mask elbow

Answer 24

non rebreathing circuit with fresh gas inlet at the patient end of the breathing tube and a reservoir bag at the opposite end

Question 25

Oxygen flush Valve

Answer 25

Button or lever that rapidly delivers a large volume of pure oxygen directly to the common gas outlet or breathing circuit

Question 26

Pop off valve

Answer 26

point of exit of an anesthetic gas from the breathing circuit

Question 27

Pressure manometer

Answer 27

gauge that indicates pressure of gasses within the breathing circuit

Question 28

Pressure-reducing valve

Answer 28

reduces the pressure of a compressed gas to a constant safe operating pressure

Question 29

Rebreathing system

Answer 29

machine fitted with a rebreathing circuit

Question 30

Reservoir bag

Answer 30

rubber or plastic bag that serves a reservoir for expired and inspired gases

Question 31

Respiratory minute volume

Answer 31

amount of air that moves into and out of the lungs in one minute

Question 32

Scavenging system

Answer 32

machine that disposes excess and waste anesthetic gases outside the building

Question 33

semi-closed rebreathing system

Answer 33

system where the pop off valve is positioned partially opened and he flow of oxygen is relatively high

Question 34

Tank pressure gauge

Answer 34

indicates the pressure of the gas remaining in a compressed gas cylinder

Question 35

Tidal volume

Answer 35

volume of a normal breath

Question 36

unidirectional valves

Answer 36

inspiratory valve or expiratory valve of a rebreathing circuit

Question 37

vaporizer in circuit

Answer 37

vaporizer located in the breathing circuit

Question 38

vaporizer out of circuit

Answer 38

vaporizer which carrier gas from flow meters flows into the vaporizer before entering the breathing circuit