Nasal Oxygen Delivery Devices
Nasal cannula can be ...

Nasal Oxygen Delivery Devices

Nasal cannula can be used to deliver supplemental O2. Conventional nasal cannula are commonly used deliver low flow rates & moderate FiO2.

High flow nasal cannula (HFNC) delivers higher flow rates achieving a higher FiO2 with greater patient comfort.

In hypoxemic respiratory failure use of HFNC is associated with a lower rate of requiring intubation & lower ICU mortality compared to CNC or NIPPV. HFNC can prevent reintubation after thoracic and cardiac surgeries. Extubation to HFNC is also associated with lower rates of re-intubation.

Physiology of Heated High Flow Nasal Cannula

 • Higher flow washes out CO2 from anatomical dead space in the nasopharynx

 • Higher flow overcomes resistance against expiratory flow and creates a small positive nasopharyngeal pressure (approximatelv 0.7 cm H2O of PEEP for every 10 lpm of flow)

 • Patients in respiratory distress generate high flows and will entrain ambient air with conventional nasal cannula. HFNC can match demand so FiO2 remains relatively constant

 • Warm humidified gas preserves mucociliary function & is more comfortable for patients

- Nick Mark MD @nickmmark

#Nasal #Oxygen #Delivery #Devices #management #pulmonary #criticalcare
Contributed by

Dr. Gerald Diaz
Board Certified Internal Medicine Hospitalist, GrepMed Editor in Chief 🇵🇭 🇺🇸 - Sign up for an account to like, bookmark and upload images to contribute to our community platform. Follow us on IG: | Twitter:
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