A ventilation system for providing patient-triggered support ventilation to a spontaneously breathing patient during ongoing HFV ventilation has a pneumatic unit for delivery of breathing gas to the patient in response to an effort to breathe by the patient, a control computer for controlling the delivery of breathing gas by said pneumatic unit, and an oscillator for superimposing high frequency oscillation onto the breathing gas. The system further includes a bioelectric sensor that measures a bioelectric signal indicative of the patient's efforts to breathe, and the control computer is configured to control the delivery of breathing gas in response to the patient's effort to breathe, based on this bioelectric signal. The ventilation system is hence designed for neurally triggered support ventilation during ongoing high frequency ventilation, HFV, which makes the trigger mechanism of the ventilation system more precise and robust compared to trigger mechanisms of known ventilation systems capable of providing support ventilation during ongoing HFV ventilation.
