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Respiratory Failure & Mechanical Ventilation

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Increased Resistance in PCV

In pressure-controlled ventilation, the pressure (∆P) is fixed on the left side of the equation and the increased resistance (red) will result in a decrease in the delivered volume (green) without a change in the pressure (blue) to keep the equation in balance.

∆P= ↑R x F + ↓∆V/Cst

The rise in resistance in pressure control ventilation will show no change in the pressure on the pressure scalar, but the volume will be decreased, and the flow will be limited during both inspiration and expiration.

Ahmed Hossam
Ashwaq Ali
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