Episodio – Altitud >4.000 m: alcalosis respiratoria con hipoxemia persistente | USMLE Step 1

from USMLE DREAMERS · host USMLE DREAMERS

En este episodio de USMLE Dreamers, analizamos a un montañista que permanece 2 días a >4.000 m y le toman una GSA (gasometría sanguínea arterial) respirando aire ambiente. Conectamos PiO₂ (presión inspirada de oxígeno) baja → hipoxemia → hiperventilación por quimiorreceptores carotídeos → PaCO₂ baja y alcalosis respiratoria, y luego explicamos por qué, tras varios días, el riñón compensa con excreción de HCO₃⁻ (bicarbonato). Cerramos con los ajustes que mejoran el suministro de O₂: 2,3-BPG (2,3-bisfosfoglicerato), VEGF (factor de crecimiento endotelial vascular) y EPO (eritropoyetina).#USMLEDreamers #USMLE #Step1 #Medicina #Fisiologia #Pulmon #Altitud #Gasometria #AcidoBase

Episode metadata supplied by the publisher feed · Published Feb 4, 2026

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Episodio – Altitud >4.000 m: alcalosis respiratoria con hipoxemia persistente | USMLE Step 1

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