#206 Lactate vs Capillary Refill Time | Which Is Better for Assessing Shock & Perfusion?

Lactate and capillary refill time (CRT) are two of the most commonly used markers to assess tissue perfusion and shock—but they reflect very different physiology. In this episode, we directly compare lactic acid and capillary refill time, exploring what each represents, their strengths and limitations, and how to use them together at the bedside.

We cover: • What lactate represents physiologically • What capillary refill time reflects about perfusion • CRT vs lactate in septic and non-septic shock • Advantages and limitations of each marker • Evidence comparing CRT-guided vs lactate-guided resuscitation • Practical ED and ICU decision-making

Link to video: https://www.youtube.com/watch?v=EWyaoPzbp-k

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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.