Currently different technologies are available that help a patient to breath. Two of these technologies are Intermittent Positive Pressure Ventilation (IPPV) and High Frequency Oscillatory (HFO) ventilation. There are no ventilators with HFO functionality on the market that can work without a pressurized gas source. The goal of this research is to combine an IPPV ventilator module based on a blower technology with a ventilator with HFO functionalities to create a ventilator module with IPPV and HFO functionality that uses ambient air a gas source. The requirements near the patient are translated to system's requirements based on a simulation model of the hose system and the patient. The system requirements are used to make a simulation based design of the new Respiratory Module. Between the IPPV ventilator module and the HFO module a membrane valve is designed to connect both modules. This valve passively controls the flow during negative pressures near the IPPV ventilator module. This is needed because the blower inside the IPPV ventilator module has an open connection with ambient during negative pressures of the HFO module. A voice-coil controlled membrane valve is chosen to use as expiration valve in the design of the Respiratory Module. The designed membrane valve and expiration valve fulfil the main requirements and are feasible designs for further design iterations. The control of the Respiratory Module was out of the scope of this research, but the control determines if the total Respiratory Module fulfils the requirements. The membrane valve between the IPPV ventilator module and the HFO Module complicates the control.