How are volume-targeted breaths vs pressure-targeted?

Volume-targeted: choose tidal volume, breath enters by flow rate and pattern of delivery, greater flow -> shorter Ti, shorter inspiration:expiration, greater peak inspiratory pressure. (but should avoid hyperinflation from too short expiration) Depends on lung compliance (monitor hypocapnia (alkalosis), too high TV (COPD) risk of breath-stacking decreasing ventilation) Pressure-Targeted: doesn't guarantee specific Vt, inspiratory pressure, Ti and lung compliance determine its effect, can be mandatory or spontaneous (Ti) whereas Pi is set by clinician