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Effects of PEEP on Airway Pressures and Volumes in Mechanical Ventilation

This study examines the relationship between PEEP (Positive End-Expiratory Pressure) and airway pressures and volumes through experiments using two test lungs. Hypotheses include a direct relationship between PEEP and airway pressure and an inverse relationship between PEEP and lung volumes. The results indicate that in pressure control, increasing PEEP raises airway pressure while reducing volume, whereas in volume control, increasing PEEP consistently raises airway pressure. Understanding these dynamics is crucial for optimizing mechanical ventilation strategies.

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Effects of PEEP on Airway Pressures and Volumes in Mechanical Ventilation

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  1. How changes in Peep affect AIRWAY PRESSURES AND VOLUMES Mariela Fernandez Joseph D. Lowery Jesse Sparks Edited by Elizabeth Kelley Buzbee AAS, RRT-NPS, RCP

  2. Quick Overview • One Ventilator • Two Test Lungs

  3. Hypothesis Peep and airway pressure have a direct relationship whereas Peep and volume have an inverse relationship.

  4. Two Test Lungs

  5. Test Lung 1 • Compliance set at 50 ml/cmH2O • Resistance set at 10 • Small capacity could not accommodate ventilator settings.

  6. Test Lung 2AKA Blue Betty • Compliance 40 cmH2O • Resistance was set to 1 • (standard resistance for an ETT )

  7. Ventilator Servo I Parameters Using Test Lung 1

  8. Test lung #1Volume Control

  9. Pressure Control

  10. Ventilator Servo I Parameters Using Test Lung 2

  11. Volume Control 400ml

  12. Pressure Control Test lung 2

  13. Conclusion • In pressure control as PEEP is increased pressure goes up and volume goes down. • In volume control as PEEP is increased pressure goes up. ~ PEEP will always increase pressure ~

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