Oxygen Therapy Nasal Cannula — Contraindications

Known ignition source near oxygen delivery (fire risk) or smoking during therapy

Target oxygen saturation ranges should be individualized; risk of CO2 retention in susceptible patients
Hypercapnic respiratory failure requiring controlled oxygen titration
Nasal obstruction or skin breakdown preventing cannula use
Paraquat poisoning or bleomycin lung injury: avoid high FiO2� if possible
Sinus surgery

National Fire Protection Association. (2021). NFPA 99: Health care facilities code. National Fire Protection Association.
American Association for Respiratory Care. (2020). AARC clinical practice guideline: Oxygen therapy in adults. Respiratory Care, 65(6), 731�749. https://doi.org/10.4187/respcare.06786
Heuer, A. J., Scanlan, C. L., & Wilkins, R. L. (2021). Egan's fundamentals of respiratory care (11th ed.). Elsevier.
O'Driscoll, B. R., Howard, L. S., Earis, J., Mak, V. H. F., & British Thoracic Society Emergency Oxygen Guideline Group. (2017). BTS guideline for oxygen use in adults in healthcare and emergency settings. Thorax, 72(Suppl 1), ii1�ii90. https://doi.org/10.1136/thoraxjnl-2016-209729