WorksheetsOxygen Theraphy
Total questions: 20
Worksheet time: 10mins
Oxygen therapy is primarily used to:
Treat pain
Prevent hypoxia in patients with impaired ventilation or gas exchange
Reduce blood pressure
Oxygen is considered a drug because it:
Is flammable
Has side effects only at high doses
Requires prescription specifying concentration and delivery method
Which is more important when prescribing oxygen therapy?
Litres per minute
Oxygen concentration (FiO₂)
Duration of therapy
In patients with COPD receiving oxygen therapy, adequate oxygenation is indicated by:
SpO₂ > 90% with improved exercise tolerance
SpO₂ > 95%
Normal respiratory rate only
Why is oxygen therapy considered a fire hazard?
Oxygen explodes under pressure
Oxygen supports combustion and increases fire intensity
Oxygen produces sparks
Which safety precaution is essential for patients on oxygen therapy?
Use wool blankets for warmth
Apply oil-based skin products
Place “No Smoking: Oxygen in Use” signs
Which material should be avoided near patients receiving oxygen?
Oils and alcohol-based products
Cotton fabrics
Sterile water
In hospitals, oxygen is most commonly supplied via:
Portable oxygen concentrators
Wall-mounted oxygen outlets
Liquid oxygen tanks only
Oxygen cylinders should always be:
Stored lying flat
Kept near heat sources
Secured upright in stands or transport devices
When using a wall oxygen outlet, the flowmeter should initially be:
Turned to maximum flow
Half-open
In the off position before attachment
The correct reading of the prescribed flow rate on a flowmeter is:
At the middle of the black ball
At the top of the black ball
At the bottom of the tube
Why is humidification used with oxygen therapy?
To increase oxygen concentration
To prevent drying of respiratory mucosa and loosen secretions
To reduce infection risk
Very low flow oxygen (1–2 L/min via nasal cannula) usually:
Always requires humidification
Does not require humidification
Causes severe mucosal irritation
Variable (low-flow) oxygen devices mix oxygen with:
Room air
Carbon dioxide
Nitrogen only
Which of the following is a low-flow oxygen delivery device?
Venturi mask
Nasal cannula
CPAP mask
A nasal cannula typically delivers:
40–60% oxygen at 6–10 L/min
28–35% oxygen at 2–4 L/min
85–100% oxygen at 10–15 L/min
The simple face mask (Hudson mask) must be set above 5–6 L/min to:
Prevent rebreathing of carbon dioxide
Improve patient comfort
Reduce oxygen toxicity
Which device can deliver up to 85–100% oxygen?
Partial rebreather mask
Nasal cannula
Non-rebreather mask
The oxygen delivery device of choice for COPD patients is:
Venturi mask
Non-rebreather mask
Simple face mask
Which complication may occur in COPD patients receiving excessive oxygen?
Pulmonary oedema
CO₂ narcosis due to reduced respiratory drive
Bronchospasm
