Count to 10 - Anaesthetic Primary Podcast EP8 - Applied Respiratory Physiology | Anaesthetic Primary Topic | Respiratory Physiology | CT10
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Feb 22, 2023 The podcast delves into applied respiratory physiology, covering preoxygenation, effects of anesthesia on the respiratory system, causes of hypoxemia and hypoxia, and key SAQs. Topics include aging effects on respiration, lower SPO2 limits in anesthesia, and clinical implications of over-PEEP. The episode provides in-depth insights into respiratory physiology and its practical applications in anesthesia.
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Preoxygenation Explained
- Preoxygenation denitrogenates the FRC, replacing it with oxygen to extend apnea time.
- A normal 70kg person's FRC, about 2 liters, becomes an oxygen reservoir, crucial for preventing desaturation during apnea.
Patient Positioning and Respiratory Physiology
- Consider patient positioning during anesthesia as it impacts FRC and respiratory physiology.
- Trendelenburg worsens respiratory consequences, while reverse Trendelenburg or prone positions are generally better.
IPPV and PEEP: Balancing Benefits and Risks
- IPPV (intermittent positive pressure ventilation) can cause volume trauma, barotrauma, and biotrauma.
- PEEP (positive end-expiratory pressure) mitigates IPPV effects but can be harmful in high amounts.