What type of ventilation flips the normal inspiration/expiration ratio making inspiration longer than expiration?

The type of ventilation that alters the normal inspiration/expiration ratio, making inspiration longer than expiration, is pressure-controlled inverse ratio ventilation. This method is designed to optimize oxygenation in patients with severe respiratory distress or conditions that require prolonged inspiration to enhance gas exchange.

In pressure-controlled inverse ratio ventilation, the inspiratory phase is extended relative to the expiratory phase, which can help to improve lung inflation and increase functional residual capacity. By prolonging inspiration, this mode allows for more time for gas exchange and can decrease the risk of atelectasis in patients with compromised lung function.

This technique is particularly beneficial in cases of acute respiratory distress syndrome (ARDS) or other conditions causing significant ventilation-perfusion mismatch. It contrasts with other modes of ventilation where the normal ratio of inspiration to expiration is maintained or altered differently, focusing instead on different parameters like volume or pressure without extending the inspiratory phase to this degree.