Capillary refill time (CRT) is a simple bedside exam that provides powerful insight into tissue perfusion and shock physiology. In this comprehensive review, we break down everything folks need to know about CRT, including how to measure it correctly, how to interpret abnormal values, and how it compares to traditional markers of perfusion. We cover: • What capillary refill time represents physiologically • How to properly measure CRT at the bedside • Normal vs abnormal CRT values • CRT in septic, distributive, cardiogenic, and hypovolemic shock • Limitations and pitfalls of CRT • CRT compared to lactate and other perfusion markers • Evidence supporting CRT-guided resuscitation Link to video: https://www.youtube.com/watch?v=KRQ_SMpqwsA 📚 DOWNLOAD PDF FOR THIS VIDEO AT LINK BELOW https://www.patreon.com/c/WhiteBoardMedicine We also have MINI COURSES, STUDY GUIDES, PRACTICE QUESTIONS, AD FREE VIDEOS, EDUCATIONAL DISCUSSIONS Consider joining our patreon community today! 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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