Lightning Learning: Oxygen Delivery Devices

Lightning Learning: Oxygen Delivery Devices

Need a quick recap of the main differences between nasal cannulae, non-rebreather and venturi masks?
— advice is based on local guidelines & procedures

What?

Nasal Cannulae: low flow O2 delivery device (0.5-4l)

Higher flows make it uncomfortable for the patient.

Venturi Mask: designed to entrain a set amount of O2 and air, which combine to produce a set flow of O2 (the % stated on the venturi)

It is NOT the l/min stated on the venturi that is delivered to the patient.

Non-Rebreather Mask: only use flows 10-15l/min

If lower O2 flows are used the bag can deflate during inspiration; there will be a lower concentration of O2 delivered and the patient can re-breathe CO2.

Why?

Nasal Cannulae: for patients that require low flow O2 to maintain saturations.

More comfortable than a mask – does not restrict vision or mouth.

Venturi Mask: for patients that required a fixed amount of O2 (e.g. COPD where too much O2 can be dangerous).

Makes weaning O2 easier – the venturi can be changed to reduce O2 in a stepwise way.

Non-Rebreather Mask: for patients with low O2 saturations requiring high flow rates.

Do not use long term as can cause complications such as O2 toxicity and reabsorption atelectasis.

Further Reading

Lightning Learning: Comprehensive Geriatric Assessment

Lightning Learning: Comprehensive Geriatric Assessment

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