The oxygen-hemoglobin dissociation curve is a foundational concept for understanding oxygen binding, oxygen unloading, hypoxemia, and tissue oxygen delivery. In this episode, we review what the oxygen-hemoglobin dissociation curve represents, how hemoglobin saturation relates to PaO2, what P50 means, and how left and right shifts change hemoglobin’s affinity for oxygen. Topics covered include: • What the oxygen-hemoglobin dissociation curve is • Hemoglobin saturation and PaO2 • Oxygen binding and oxygen unloading • Why the curve has a sigmoidal shape • Hemoglobin affinity for oxygen • P50 and what it means • Left shift of the oxygen-hemoglobin curve • Right shift of the oxygen-hemoglobin curve • Temperature, pH, CO2, and 2,3-BPG • How left shift affects oxygen unloading • How right shift affects oxygen unloading • Clinical relevance of the oxygen-hemoglobin dissociation curve • Practical interpretation of oxygen saturation and PaO2 Watch the full video on YouTube: https://www.youtube.com/watch?v=nhfGv85TwfI 📚 Join the WhiteBoard Medicine Patreon Community https://www.patreon.com/WhiteBoardMedicine Join a growing emergency medicine, critical care, and resuscitation education community built around high-yield clinical learning. Patreon members get access to: • Comprehensive Study Guides • Bedside One-Pagers • Clinical Reviews • Mini-Courses • Practice Questions • Ad-Free Videos • Structured Topic Collections 🌐 WhiteBoard Medicine Website Explore our growing library of critical care and emergency medicine content: https://www.whiteboardmedicine.com ⚠️ Educational Disclaimer: This content is intended for educational purposes only and should not be used as a substitute for clinical judgment, institutional protocols, specialist consultation, or individualized patient care. Full disclaimer: https://whiteboardmedicine.com/disclaimer

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“What did the council decide on item 42?” — answered with the speaker and the moment.

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