Some topics that have been batting around my head over the past few months:

The Secret Sixth Cause of Arterial Hypoxemia

You should know the standard five:

* V/Q Mismatch (Deadspace)

* Low FiO2

* Hypoventilation

* Diffusion Abnormality

* Shunt (Usually Physiologic)

but the sixth cause can be particularly dangerous with cause #5, the physiologic shunt. The sixth cause is Low Mixed Venous Saturation (SvO2).

John Marinaro created this acronym for the causes above:

Shunt

Hypoventilation

Altitude/low PAO2

V/Q mismatch

Excess extraction of O2 from Hb (low SvO2)

Diffusion Abnormalities

 

Pure Vasoactives

It ain't phenlephrine anymore

Dissociated Awake for Critical AS/Pulmonary Hypertension

just keep loving this more and more. See the hemodynamically neutral intubation podcast for the final version of this idea.

Now on the the Podcast and Happy New Year...