Volsko’s Chap 2

Question 1

Pressure regulating devices

Answer 1

Single stage regulator: reducing valve drops the pressure to its working level in one stage

Question 2

How air/oxygen blenders work

Answer 2

Used for precise combination of air and O2

Creates a stable FiO2

Requires two equal high-pressure (50psig) air and oxygen sources

Desired FiO2 is set by a dial

Question 3

How oxygen concentrators work

Answer 3

Separates oxygen from other gases in the air using a chemical sieve

Takes the 21% to make it higher

Question 4

Delivery device for Heliox

Answer 4

Non-rebreather

Question 5

Oxygen conserving devices

Answer 5

Nasal cannula
Nasal catheter
Transtracheal oxygen catheter

Question 6

Low flow devices and their FiO2/Flow ranges

Answer 6

Nasal Cannula: [.24 - .44] 1-6 lpm (rule of four)

Simple Mask: [.35 - .50] 5-10 lpm

Oxymask: [.24 - .90] 1-flush lpm

Partial ReBreather: [.40 - .70] 6-10 lpm

Non-Rebreather: [.60 - .80] 10pm

Question 7

Fixed high flow devices

Answer 7

Air- Entrainment nebulizers (LARGE- VOLUME NEBS)

High Flow nasal cannula (up to 60lpm)

Air -Entrainment mask (Venturi)

Question 8

Know how to calculate Air:O2

Answer 8

Magic Box

Total Parts: add numbers in ratio

Total flow: answer for total parts x lpm

Entrained Flow: lpm x air number in the ratio
Ex: 3:1 ratio, 15lpm….. 15 x 3