Anaesthesia General 2305d814 The following modes of ventilation may be used for weaning off patients from mechanical ventilation except – A Controlled mechanical ventilation (CMV) B Synchronized intermittent mandatory ventilation (SIMV) C Pressure support ventilation (PSV) D Assist–control ventilation (ACV) High-Yield Explanation It is possible to wean patient in any mode of ventilation except control mode ventilation.