Anesthesia Machine basics

Question 1

What would delivering anesthetic gas in air (21% O2) lead to

Answer 1

Hypoxemia

d/t hypoventilation & V/Q mismatch induced by anesthetics themselves

Question 2

What is the minimum acceptable % O2 in people & SA

Answer 2

30-35% (FiO2 0.3.-0.35)

Question 3

What is the metabolic requirement for oxygen

Answer 3

5-10 mL/kg/min

minimum O2 flow required

Question 4

How is an E cylinder attached to anesthesia machine

Answer 4

directly via yoke

Question 5

How is cylinder pressure measured

Answer 5

PSI (pounds per square inch)

Question 6

How is breathing system pressure measured

Answer 6

cmH2O (centimeters water)

Question 7

What is breathing system

Answer 7

pressure in pt lungs

Question 8

What is the capacity of E cylinder

Answer 8

660 L

Question 9

What is the capacity of H cylinder

Answer 9

6600 L

Question 10

how to calculate remaining O2 in cylinder

Answer 10

660L/2200psi = X L/psi left on E tank

Question 11

how to calculate minutes O2 remaining

Answer 11

minutes = X L/Flow L/min

Question 12

It is possible to calculate the amount of N2O gas remaining in a tank T or F

Answer 12

False
N2O exist in both a gas & liquid form in tank
gauge only reads gas pressure
if any liquid N2O remains gauge not accurate

Question 13

What is DISS

Answer 13

diameter index safety system

non-interchangeable gas specific threaded connection system

Question 14

What does regulator do

Answer 14

decr cylinder pressure to 50 psi (safe working pressure)

Question 15

Where is flow read on flowmeter

Answer 15

middle of ball

top of bobbin

Question 16

What is the gas delivery rate from the quick flush

Answer 16

35-75 L/min directly to pt circuit

Question 17

What comes from quick flush

Answer 17

Pure O2 that has bypassed the vaporizer

Question 18

What should be done before O2 flush valve is utilized

Answer 18

Pt should be disconnected from the circuit

Question 19

Possible complication of quick flush use

Answer 19

Pneumothorax

Question 20

What is the amount of anesthetic coming from vaporizer called

Answer 20

volumes percent

Question 21

What is vapor

Answer 21

gaseous state of substance that is liquid at ambient temp & pressure (760mmHg & 20C)
Halothane, Iso, Sevo, Desflurane

Question 22

What is gas

Answer 22

exists in gaseous state at ambient T & P

N2O, Xenon

Question 23

Define vapor pressure

Answer 23

pressure exerted by vapor molecules when liquid & vapor phases are in equilibrium
increases w/ temp increase

Question 24

define saturated vapor pressure

Answer 24

vapor maximum administration percentage

Question 25

modern vaporizers work by what method

Answer 25

specific concentration is created by variable bypass system, where fresh gas flows over a reservoir of liquid anes & mixes w/ carrier gas

Question 26

what type of vaporizers are modern vaporizers

Answer 26

out of circuit (VOC)

Question 27

what is a precision vaporizer

Answer 27

the anesthetic % is known

Question 28

vaporizers in circuit aka ____

Answer 28

non precision
cannot produce known anesthetic %
Not currently recommended

Question 29

what must happen to vaporizer before transportin

Answer 29

must be emptied

cannot be tipped

Question 30

what is common gas outlet

Answer 30

where gas exits vaporizer

connected by hose to fresh gas inlet