In an inverse I:E ventilation, which statement about inspiratory time (Ti) and expiratory time (Te) is correct?

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In inverse I:E ventilation, the inspiratory phase is made longer than the expiratory phase to keep the lungs inflated for a longer portion of the cycle. This increases mean airway pressure and enhances alveolar recruitment, which can improve oxygenation in stiff or poorly compliant lungs. So the inspiratory time being longer than the expiratory time is the defining feature of this mode.

Think of it as the opposite of the normal pattern, where expiration is longer to allow for passive exhalation. If the expiratory time were longer, or if they were equal, it would not be an inverse setup. Shortening the expiratory phase, while prolonging inspiration, can raise airway pressures and improve gas exchange but requires careful monitoring to avoid hemodynamic compromise or air trapping.