6.8: Volume Assured Pressure Support/Pressure Augmentation

Breathe Easy: RT Student Resource for Mechanical Ventilation · LibreTexts

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    Volume Assured Pressure Support

    Volume Assured Pressure Support (VAPS) is described as a dual control mode within a breath, and may also be called Pressure Augmentation depending on the ventilator. We are discussing this mode under spontaneous modes, as a key component of using it in practice, as the patient has the ability to trigger breaths and has a consistent drive to breathe.

    Ventilation starts with a patient-triggered pressure support breath, but volume is targeted, so pressure will be adjusted to achieve the target volume. Breaths are patient-triggered, volume targeted, pressure supported and flow cycled. The difference between this mode and other volume targeted dual modes, is that the ventilator makes adjustments within the same breath, as follows: the clinician typically sets a A simple black silhouette of a fox standing on all fours with a bushy tail. target, a minimum A simple black outline of a cat sitting with its tail curled around its body., set pressure support, inspiratory flow and sensitivity.

    If A simple black silhouette of a fox standing on all fours with a bushy tail. is met before inspiratory flow drops to the preset level for cycle, then the breath is simply a PSV breath. If monitored A simple black silhouette of a fox standing on all fours with a bushy tail. is less than the target volume, the ventilator maintains the set flow until the volume is delivered and the ventilator switches from flow cycle to volume cycle.

    Three line graphs display time series data with labeled key points and varying orange and blue lines, indicating changes over time.
    Figure 6.8.1: “Volume Assured Pressure Support” by Freddy Vale, CC BY-NC-SA 4.0

    This page titled 6.8: Volume Assured Pressure Support/Pressure Augmentation was last modified on Fri, 16 Oct 2026 18:17:23 GMT and is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Yvonne Drasovean via source content that was edited to the style and standards of the LibreTexts platform.