Discover and read the best of Twitter Threads about #respiratoryfailure

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#Tweetorial on hypoxemic #respiratoryfailure. #FITSurvivalGuide #FOAMed
1️⃣ Shunt
2️⃣ V/Q mismatch
3️⃣ Low FiO2/low O2 tension
4️⃣ Alveolar hypoventilation
5️⃣ Diffusion limitation
6️⃣ Venous admixture
#CriticalCare
1️⃣Shunt - can be intra or extrapulmonary. No V, only Q. Does not respond to O2 - shunt fraction not exposed to o2. Inflamm alveolar dz (eg PNA) can p/w shunt (imp. vasoconstr.) Think abt PFO w R➡️L shunt in PE, ARDS (elevation in R sided pressures), check bubble study. Aa grad ⬆️
2️⃣V/Q mismatch. More Q than V but regions with low V not entirely excluded from gas exchange. Can improve w increasing FiO2. Probably 75-90% of hypoxemia cases. Wide Aa gradient.
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