Arterial blood gas (ABG) or venous blood gas (VBG)—what’s the difference, and when should you actually use each? In this episode, we walk through a complete breakdown of ABG and VBG, followed by a direct clinical comparison so you can confidently decide which test to use at the bedside. We cover: What an ABG measures and how to interpret it What a VBG tells you and how it differs Key differences in pH, CO₂, lactate, and oxygenation The accuracy and limitations of VBG compared to ABG When a VBG is sufficient—and when an ABG is essential Common pitfalls in blood gas interpretation Whether you’re evaluating respiratory failure, metabolic disturbances, or critically ill patients, this episode provides a clear, practical framework for blood gas interpretation in emergency and critical care. 🎥 Watch the full video version here: https://www.youtube.com/watch?v=_wzu4zi19jI 📚 Download the full study guide + access our complete emergency critical care curriculum: https://www.patreon.com/c/WhiteBoardMedicine Our Patreon includes: • Study guides for every video • Mini-courses (ventilation, shock, RRT & more) • Practice questions • Ad-free videos • A structured ICU curriculum Disclaimer: This content is for educational purposes only and does not constitute medical advice. Clinical decisions should be made by licensed healthcare professionals using their clinical judgment, institutional protocols, and current evidence. Whiteboard Medicine assumes no responsibility for clinical outcomes.

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

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