Non-rebreathing Oxygen Mask


  • delivery of high FiO2 in the spontaneously breathing patient


  • reservoir bag attached to the fresh gas flow
  • one way valve between reservoir bag and patient -> prevents expired gas entering the reservoir bag.
  • FiO2 usually between 0.6 to 0.9
Non-rebreathing Oxygen Mask


  • place on patient (covering nose and mouth)
  • dial up high gas flow rates (15L/min)


  • FiO2 of 1.0 is difficult because of valve inefficiency and lack of tight fit around the face thus entraining room air


  • retrolental fibroplasia (corneal)
  • acute O2 toxicity with hyperbaric 100% O2 -> altered mood, vertigo, LOC, convulsions.
  • dry nose and mouth
  • oxygen toxicity (pulmonary, CNS, CVS)
  • denitrogenation -> atelectasis
  • obtunding of hypoxic respiratory drive
  • ? increase in infarct size in MI
  • ? increase in mortality post cardiac arrest

CCC 700 6

Critical Care


Chris is an Intensivist and ECMO specialist at the Alfred ICU in Melbourne. He is also a Clinical Adjunct Associate Professor at Monash University. He is a co-founder of the Australia and New Zealand Clinician Educator Network (ANZCEN) and is the Lead for the ANZCEN Clinician Educator Incubator programme. He is on the Board of Directors for the Intensive Care Foundation and is a First Part Examiner for the College of Intensive Care Medicine. He is an internationally recognised Clinician Educator with a passion for helping clinicians learn and for improving the clinical performance of individuals and collectives.

After finishing his medical degree at the University of Auckland, he continued post-graduate training in New Zealand as well as Australia’s Northern Territory, Perth and Melbourne. He has completed fellowship training in both intensive care medicine and emergency medicine, as well as post-graduate training in biochemistry, clinical toxicology, clinical epidemiology, and health professional education.

He is actively involved in in using translational simulation to improve patient care and the design of processes and systems at Alfred Health. He coordinates the Alfred ICU’s education and simulation programmes and runs the unit’s education website, INTENSIVE.  He created the ‘Critically Ill Airway’ course and teaches on numerous courses around the world. He is one of the founders of the FOAM movement (Free Open-Access Medical education) and is co-creator of litfl.com, the RAGE podcast, the Resuscitology course, and the SMACC conference.

His one great achievement is being the father of three amazing children.

On Twitter, he is @precordialthump.

| INTENSIVE | RAGE | Resuscitology | SMACC

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