Rise time is the time taken to reach the target pressure in pressure control mode. In this scenario, the triangular shape of the inspiratory pressure-time scalar results from prolonged rise time, where as the typical shape of the inspiratory pressure-time scalar is square. The rise time settings in Maquet ventilators range from 0 to 20% of the breath cycle time. The set inspiratory time is 0.60 seconds (RR 23, I: E 1:3.3, breath cycle time 2.60 seconds). Rise time is 0.52 seconds (20% of the breath cycle time). During this first 0.52 seconds of inspiratory phase, the patient receives less ventilator assistance because of prolonged rise time, which leads to an increased work of breathing and a higher respiratory rate.
Choose a short rise time if a patient has rapid breathing or is experiencing respiratory distress, allowing the target pressure to be delivered more quickly.
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