Oxygen therapy

Question 1

types and names of O2 delivery devices

Answer 1

variable - nasal specs, hudson and non-rebreather
fixed - high airway flow oxygen enriiched (HAFOE) venturi masks and anaesthetic circuits

Question 2

def: variable oxygen devices

Answer 2

low flow systems
rely on patient’s respiratory demand

Question 3

FiO2 and flow rate: nasal cannula

Answer 3

0.24-0.36
1.2-4L

Question 4

adv and disad: nasal cannula

Answer 4

adv - eat, drink and talk normally
disad - must expire through mouth to not lose resevoir in nasopharynx, nasal passage drying and nose bleeds

Question 5

FiO2 and flow rate: Hudson

Answer 5

0.35-0.6
max 15L

Question 6

disad: Hudson

Answer 6

claustrophobic and prevents eating and drinking

Question 7

FiO2 and flow rate: non-rebreather

Answer 7

0.6-0.85
10-15L

Question 8

adv: non-rebreather

Answer 8

• minimal rebreathed expired CO2 (increasing FiO2)
• must fill resevoir bag before use

Question 9

FiO2 and flow rate: HAFOE venturi

Answer 9

entrainment port determines FiO2, not flow rate
0.24, 0.28, 0.35, 0.4 and 0.6

Question 10

optimal flow rate: nebuliser

Answer 10

4-6L

Question 11

FiO2 and flow rate: BVM

Answer 11

0.8
12-15L