High-frequency fan ventilator

摘要

A high-frequency fan ventilator having a rotating fan fixed via its central shaft to the base of a ventilator chamber. The chamber has separate openings for incoming pressurized air/oxygen and other openings for expelling exhaled gas rich with carbon dioxide originating from the lungs. Using the high-frequency fan ventilator, gas exchange between the lungs and the atmosphere is achieved by rotation of the fan. This rotation creates a negative pressure zone around the fan's center and leads to helical gas waves moving towards the fan's center (away from the lungs), simulating expiration of gas from the lungs. The rotation of the fan's arms also produces helical gas waves directed from the fan, to the periphery of the chamber and towards the lungs through the connector of the ventilation chamber and the endotracheal tube, which is inserted into the trachea, simulating inspiration of gas into the lungs. Adequate lung inflation is maintained by keeping a pre-set level of positive pressure within the system achieved by intermittent obstruction of the exhalation openings in the ventilation chamber's wall. Monitoring devices are coupled to the chamber to monitor and measure the temperature, humidity and pressure within the chamber.