l6

Question 1

3 diff ways O2 can be given for O2 therapy

Answer 1

O2 cylinders
O2 concentrators
Liquid O2

Question 2

3 different patient interfaces

Answer 2

Nasal Cannula-Mild hypoxaemia not critical illness

Uncontrolled masks-Non re-breathable, risk CO2 uptake

Controlled (fixed) masks; High O2 flow rate. 1 way valve prevents mixing of room air

Question 3

what are O2 therapy used to treat (4)

Answer 3

1-Acute Hypoxaemia
2-Chronic-COPD with exacerbation
3- Chronically hypoxemic-stable patients
4- Palliative use in advanced malignancy

Question 4

Target O2 saturations

Answer 4

Normal adult average: 96-98%

Target 94-98%

Target for those @risk of hypercapnia-high PaCO2 -88-92%

Question 5

what happens if you over correct their PO2

Answer 5

you may switch their respiratory drive off:

• Narcosis-failure of consciousness
• Worsening
• Further CO2 retention

Question 6

what do you have to think about when prescribing O2

Answer 6

Think about:1-target O2 saturation drive
2-delivery device
3-dosage

Question 7

CPAP machines

Answer 7

+ve pressure is delivered to airway via mask

pharynx stoysich

Question 8

what is pharynx stoysich

Answer 8

Drugs are applied to the mucous membranes of the conjunctiva, nasopharynx, oropharynx, vagina, colon, urethra…

Question 9

evaluate the use of CPAP machines

Answer 9

+- Symptoms resolve

decrease in apnoea-cessation of breathing temporarily when asleep

Decrease in daytime sleepiness

• ves: Airway drying
• lifelong treatment

Question 10

Management whiles on CPAP

Answer 10

Normalise:-oxyhaemoglobin saturation levels
- apnoea-hypopnoea index

Behavioural-weight loss
Avoid alcohol
Avoid sleeping supine-on back

Question 11

clinical features of sleep apnoea

Answer 11

snoring 
Nocturnal chocking 
Dry mouth 
In-refreshing sleep 
Cor-pulmonale

Question 12

what is Cor-pulmonale

Answer 12

Lung disease causing abnormal enlargement of right heart