Adaptive Support Ventilation (ASV): A Closed Loop Ventilation with Pressure-Targeted Mode

Adaptive support ventilation (ASV) utilizes a pressure-targeted approach to closed loop ventilation. This approach optimizes the balance between tidal volume and respiratory frequency based on lung mechanics predicted by Otis. ASV adopts a pressure ventilation format, which establishes a ventilatory pattern that minimizes the work of breathing, auto positive end expiratory pressure (PEEP), and peak airway pressure. The gas delivery format of ASV is similar to pressure control ventilation and pressure-regulated volume control. However, ASV differs from these methods by incorporating algorithmic control of the ventilatory pattern. ASV automatically determines the ideal tidal volume and respiratory rate to maintain peak pressure below the target level.

[@ibrahimaldraiwiesh9383]

Thanks for such informative lecture. Does the I:E ratio always 1:1 ? meaning that both inspiratory and expiratory times based on 3 time constant?

[@ICUREACH]

No the I:E ratio is dependent on the expiratory time constant which determines the expiratory time then I:E is determined from respiratory rate and expiratory time