Oxygenation “Part of the Dumb-It-Down Lecture Series”

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Presentation transcript:

Oxygenation “Part of the Dumb-It-Down Lecture Series”

How do we support a patient’s pulmonary function? Oxygenation Nasal Cannula Mask/Venti-Mask Partial Non-Rebreather/Full Non-Rebreather Supplemental O2 given through a device helping maintain ventilation Ventilation Ambu-bag Mouth to Mouth BiPAP/CPAP Invasive Mechanical Ventilation

The Most Misunderstood Equipment in the Hospital…

What is the FiO2 of a Nasal Cannula?

Guess-ta-mation

Why isn’t 100% FiO2 Achieved?

Normal Flow Rate is 25L/min, so if a nasal cannula is delivering 2L/min… FiO2 = [(% of flow from NC) + (% of flow from RA)]/ total flow FiO2 = [(2)(1) + (23)(0.21)]/25 = 0.27

Why isn’t 100% FiO2 Achieved? But the percent of flow obtained from the nasal cannula is variable…

Monitoring Oxygenation

Pulse Oximetry

When is Pulse Oximetry Wrong? Carbon Dioxide/Cyanide (falsely high) Nail Polish (falsely low) Methemoglobinemia (falsely low) Hypoxia (falsely low) Hypotension (wont pick up arterial pulsations)

Pulse Oximetry is not PaO2 The , Rule: PaO2SaO

Pulse Oximetry is not PaO2