WBM Emergency & Critical Care

Methylene blue and hydroxocobalamin are rescue therapies sometimes considered for vasoplegic shock and refractory vasodilation. In this episode, we compare methylene blue with hydroxocobalamin, focusing on mechanisms of action, nitric oxide-mediated vasodilation, hemodynamic effects, dosing considerations, adverse effects, and practical clinical use.
Topics covered include:• What vasoplegic shock is• Refractory vasodilation and shock physiology• Nitric oxide-mediated vasodilation• Methylene blue mechanism of action• Hydroxocobalamin mechanism of action• Hemodynamic effects of methylene blue• Hemodynamic effects of hydroxocobalamin• Clinical scenarios where these agents may be considered• Dosing and administration considerations• Adverse effects and monitoring• Interference with labs, pulse oximetry, and dialysis machines• Methylene blue versus hydroxocobalamin comparison• Practical bedside considerations in vasoplegic shock
Watch the full video on YouTube: https://www.youtube.com/watch?v=D77f6YsQhbs 
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⚠️ 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

Driving pressure and stress index are two important concepts used to think about lung stress, lung-protective ventilation, overdistension, tidal recruitment, and ventilator-induced lung injury. In this episode, we compare driving pressure with stress index, focusing on what each measurement means, how they are interpreted, how they relate to compliance and ventilator waveforms, and how they can inform mechanical ventilation strategy.
Topics covered include:• What driving pressure is• What stress index is• Plateau pressure, PEEP, and driving pressure• Pressure-time waveform interpretation• Lung stress and strain during mechanical ventilation• Respiratory system compliance• Overdistension• Tidal recruitment and derecruitment• Stress index less than 1• Stress index equal to 1• Stress index greater than 1• Driving pressure and lung-protective ventilation• Stress index and ventilator waveform analysis• Comparing driving pressure and stress index• Practical bedside applications and limitations
Watch the full video on YouTube: https://www.youtube.com/watch?v=fULtSMAxMJ8 
📚 Want More Emergency & Critical Care Medicine Education?Join the WhiteBoard Medicine Patreon community:https://www.patreon.com/WhiteBoardMedicine
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🌐 WhiteBoard Medicine WebsiteExplore 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

Methylene blue and hydroxocobalamin are rescue therapies sometimes considered for vasoplegic shock and refractory vasodilation. In this episode, we compare methylene blue with hydroxocobalamin, focusing on mechanisms of action, nitric oxide-mediated vasodilation, hemodynamic effects, dosing considerations, adverse effects, and practical clinical use.
Topics covered include:• What vasoplegic shock is• Refractory vasodilation and shock physiology• Nitric oxide-mediated vasodilation• Methylene blue mechanism of action• Hydroxocobalamin mechanism of action• Hemodynamic effects of methylene blue• Hemodynamic effects of hydroxocobalamin• Clinical scenarios where these agents may be considered• Dosing and administration considerations• Adverse effects and monitoring• Interference with labs, pulse oximetry, and dialysis machines• Methylene blue versus hydroxocobalamin comparison• Practical bedside considerations in vasoplegic shock
Watch the full video on YouTube: https://www.youtube.com/watch?v=LfBMevNxEfg 
📚 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 WebsiteExplore 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

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 WebsiteExplore 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

Norepinephrine is one of the most important vasopressors in emergency medicine and critical care. In this masterclass episode, we review the foundations of norepinephrine, including mechanism of action, receptor effects, hemodynamics, dosing, adverse effects, and monitoring, then take a deeper dive into clinical scenarios and bedside applications where norepinephrine is commonly used.
Topics covered include:• What norepinephrine is• Norepinephrine mechanism of action• Alpha-1, beta-1, and beta-2 receptor effects• Hemodynamic effects on vascular tone and cardiac output• Norepinephrine dosing and titration• Central versus peripheral administration• Norepinephrine adverse effects and monitoring• Norepinephrine in septic shock• Norepinephrine in distributive shock• Norepinephrine in cardiogenic shock• Norepinephrine in hemorrhagic shock• Norepinephrine in post-intubation hypotension• Norepinephrine and bradycardia• Norepinephrine versus epinephrine• Norepinephrine versus phenylephrine• Extravasation and safety considerations• Practical bedside norepinephrine scenarios
Watch the full video on YouTube: https://www.youtube.com/watch?v=vFjL5sp3MSk 
📚 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 WebsiteExplore 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

Dobutamine and milrinone are two important inotropes used in heart failure, cardiogenic shock, low cardiac output states, and critical care. In this masterclass episode, we compare dobutamine and milrinone with a focus on mechanisms of action, receptor effects, hemodynamics, dosing considerations, adverse effects, monitoring, and practical bedside use.
Topics covered include:• What inotropes are• Cardiac output, contractility, and hemodynamics• Dobutamine mechanism of action• Dobutamine receptor effects• Dobutamine hemodynamic profile• Dobutamine dosing considerations• Dobutamine adverse effects and monitoring• Milrinone mechanism of action• Phosphodiesterase-3 inhibition• Milrinone hemodynamic profile• Milrinone dosing considerations• Milrinone adverse effects and monitoring• Dobutamine versus milrinone comparison• Cardiogenic shock and acute decompensated heart failure• Pulmonary hypertension and right ventricular failure considerations• Practical ICU and emergency medicine applications
Watch the full video on YouTube: https://www.youtube.com/watch?v=U65DnH9VSoE 
📚 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 WebsiteExplore 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

Norepinephrine is one of the most important vasopressors in emergency medicine and critical care. In this episode, we review norepinephrine with a focus on core principles, clinical applications, dosing, hemodynamic effects, receptor physiology, adverse effects, and unique bedside scenarios where norepinephrine is commonly considered.
Topics covered include:• What norepinephrine is• Norepinephrine mechanism of action• Alpha-1, beta-1, and beta-2 receptor effects• Hemodynamic effects on blood pressure and cardiac output• Norepinephrine dosing considerations• Norepinephrine in septic shock• Norepinephrine in distributive shock• Norepinephrine in cardiogenic shock• Norepinephrine in hemorrhagic shock• Norepinephrine in post-intubation hypotension• Peripheral norepinephrine considerations• Norepinephrine extravasation• Norepinephrine versus epinephrine• Norepinephrine versus phenylephrine• Adverse effects and monitoring• Practical bedside applications and clinical scenarios
Watch the full video on YouTube: https://www.youtube.com/watch?v=w13P5CZWliY 
📚 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 WebsiteExplore 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

Dobutamine and milrinone are two commonly used inotropes with important differences in mechanism, hemodynamics, dosing, adverse effects, and clinical use. In this episode, we review the key differences between dobutamine and milrinone and how to think through inotrope selection at the bedside.
Topics covered include:• Dobutamine mechanism of action• Milrinone mechanism of action• Beta-1 agonism versus PDE-3 inhibition• Hemodynamic effects of dobutamine• Hemodynamic effects of milrinone• Effects on heart rate, contractility, and vascular tone• Pulmonary vascular resistance considerations• Renal function considerations• Common indications• Adverse effects and monitoring• Practical dobutamine versus milrinone comparison
Watch the full video on YouTube: https://www.youtube.com/watch?v=NDHbQxwMYIA 
📚 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 WebsiteExplore 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

The oxygen-hemoglobin dissociation curve is a foundational concept for understanding oxygen binding, oxygen unloading, hemoglobin saturation, P50, left and right shifts, oxygen content, oxygen delivery, and clinical oxygenation. In this masterclass episode, we bring together the core physiology and advanced applications of the oxygen-hemoglobin dissociation curve, including the Bohr effect, 2,3-BPG, anemia, sepsis, shock, and tissue oxygen delivery.
Topics covered include:• What the oxygen-hemoglobin dissociation curve is• Hemoglobin saturation and PaO2• Oxygen binding and oxygen unloading• Sigmoidal shape of the curve• Hemoglobin oxygen affinity• 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• Bohr effect and oxygen unloading• Oxygen content and the CaO2 equation• Oxygen delivery and the DO2 equation• Relationship between hemoglobin, saturation, PaO2, and cardiac output• Oxygen delivery in anemia• Oxygen delivery in sepsis and shock• Tissue oxygen extraction and oxygen consumption• Practical clinical applications in critical care
Watch the full video on YouTube: https://www.youtube.com/watch?v=JoLafLHdQss 
📚 Join the WhiteBoard Medicine Patreon Communityhttps://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 WebsiteExplore 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

Norepinephrine, vasopressin, and epinephrine are three of the most commonly used vasopressors in emergency medicine and critical care. In this episode, we review how these ICU vasopressors work, their receptor effects, hemodynamic profiles, common indications, dosing considerations, adverse effects, and practical bedside differences.
Topics covered include:• What vasopressors are• Vasopressors and shock physiology• Norepinephrine mechanism of action• Norepinephrine receptor effects• Norepinephrine indications and hemodynamics• Vasopressin mechanism of action• Vasopressin receptor effects• Vasopressin indications and hemodynamics• Epinephrine mechanism of action• Epinephrine receptor effects• Epinephrine indications and hemodynamics• Comparing norepinephrine, vasopressin, and epinephrine• Vasopressor dosing considerations• Adverse effects and monitoring• Practical ICU and emergency medicine applications
Watch the full video on YouTube: https://www.youtube.com/watch?v=qCkYZ8UZ5Co 
📚 Join the WhiteBoard Medicine Patreon Communityhttps://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 WebsiteExplore 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