![]() Now that groundwork is laid, let us investigate the concept of a mismatch between these two forces that we strive to keep in balance. This is blood flowing through the pulmonary arteries into pulmonary capillaries, and ultimately pouring out the pulmonary veins back into the left atrium.Īlong the way, as long as it’s passing by alveoli that are full of oxygen, and that oxygen can diffuse across pneumocytes into the blood, this blood will pick up some oxygen in the pulmonary capillaries, and drop off some CO2. What does the ‘Q’ in “VQ Mismatch” stand for?īlood flow. Also keeps us going. For our intents and purposes, this is air/oxygen moving in and out of the lungs. What does the ‘V’ in “VQ Mismatch” stand for? ![]() Let’s investigate what this really means so that when you drop knowledge bombs like this in front of your residents and attendings, you have some data and understanding to back it up. It sounds smart because it is, and there’s a very good chance that a ventilation perfusion (VQ) mismatch is why your patient is hypoxic. Brilliant medical student, AM Rounds, c. “.and s/he is probably suffering from some element of a V/Q mismatch.”
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