The Bird Mark 7 Series Respirators are pneumatically powered, pressure cycled, flow adjustable devices utilized for the delivery of routine IPPB therapy. They are used to provide short-term or intermittent mechanical ventilation for the purpose of augmenting lung expansion, delivering aerosol medication, and assisting with ventilation. The Bird Mark 7 Respirator features automatic inspiratory nebulization that is independent from the inspiratory flowrate setting which permits optimal aerosol production even when using low inspiratory flowrates. It utilizes all standard patient/ventilator interfaces.