![]() If there's a V/Q mismatch it's the lungs fault. Secretions can clog the area, a big mucous plug, or scarring, or inflammation like ards looking lungs, or a pneumo, or Pleural fluid. In a shunt there is an obstruction happening in the lungs. Imagine breathing with a 1.0 FiO2, but for some odd reason there's a poor amount getting to the circulation. ![]() When you hear shunt think vessels, there's a problem with circulation or the V/Q mismatch is heart related. Why would no perfusion be happening? Several reasons, it could be a clot in the pulmonary vasculature, it could be just bad piping that's genetic, it could be a birthing cardiac defect. Imagine no perfusion getting to those lungs. Imagine breathing, your lungs are functioning well you're breathing in and out, ventilation and oxygenation is occurring. Deadspace: ventilation without perfusion.
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