The stress index is a ventilator waveform concept used to assess lung stress, overdistension, and tidal recruitment during mechanical ventilation. In this episode, we review what the stress index is, how it is interpreted on ventilator waveforms, how it relates to lung-protective ventilation, and how clinicians use it to think about PEEP, tidal volume, compliance, and ventilator-induced lung injury. Topics covered include: • What the stress index is • Pressure-time waveform interpretation • Lung stress and strain during mechanical ventilation • Overdistension and excessive tidal volume • Tidal recruitment and derecruitment • Relationship between stress index and compliance • Stress index less than 1 • Stress index equal to 1 • Stress index greater than 1 • PEEP adjustment and lung recruitment • Tidal volume adjustment and lung-protective ventilation • Ventilator-induced lung injury • Practical bedside applications of the stress index • Limitations of stress index interpretation Watch the full video on YouTube: https://www.youtube.com/watch?v=ybrdFe8rlOo 📚 Want More Emergency & Critical Care Medicine Education? Join the WhiteBoard Medicine Patreon community: https://www.patreon.com/WhiteBoardMedicine Patreon members receive access to: • Downloadable Study Guides • Clinical One-Pagers • Practice Questions • Mini-Courses • Comprehensive Clinical Reviews • Ad-Free Videos • Early Access Content 🌐 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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