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PEEP Explained: Oxygenation, Compliance, and Hemodynamics

WBM Emergency & Critical Care

2,479 views

Positive end-expiratory pressure, or PEEP, is a core mechanical ventilation setting that affects oxygenation, alveolar recruitment, lung compliance, intrathoracic pressure, venous return, and hemodynamics. In this video, we review what PEEP is, how it works, how it improves oxygenation, how it affects compliance, and why it can also influence cardiac output and blood pressure.

Topics covered include:
• What PEEP is
• End-expiratory pressure explained
• Alveolar recruitment
• Oxygenation and shunt physiology
• FiO2 versus PEEP concepts
• PEEP and lung compliance
• Atelectasis and derecruitment
• Overdistension
• Intrathoracic pressure
• Venous return
• Right ventricular afterload
• Cardiac output and blood pressure effects
• PEEP titration considerations
• Common PEEP interpretation pitfalls
• Practical bedside framework

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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.
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#PEEP
#MechanicalVentilation
#Oxygenation
#CriticalCare
#MedicalEducation

2 Comments

@WBMECC Creator 9 months ago (edited) Pinned

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@LUVDOGS1954 9 months ago

Ah yes, PEEP plus sufficient flow to meet peak inspiratory demand (spontaneously breathing patient via mask) and an elevated baseline=CPAP. Essentially almost normal tidal volume breathing waveform at the desired/measured elevated baseline. I have seen this work numerous times to prevent intubation in ARDS patients. The first indicator is not an elevated Sp02, but a almost immediate reduction in respiratory rate, a reduction in the work of breathing and increased oxygenation resulting from alveolar recruitment. Reportedly first and early use by Gregory MD for hyaline membrane disease in neonates, much work was done by John Downs MD (anesthesiologist) and Jukka Rasanan MD at Ohio State University and the University of Florida, eventually expanding their work to APRV (Airway Release Pressure Ventilation) for a drop to ambient for CO2 retainers. This is an EXCELLENT Channel and I appreciate your work!