Lightning Learning: Oxygen Delivery Devices
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.
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.
- Life in the Fast Lane: Non-rebreathing Oxygen Mask
- NUH Clinical Guidelines: Administration of Oxygen in Adults (2012)
- British Thoracic Society: Guideline for Emergency Oxygen Use in Adult Patients