The influence of an orifice plates as a flow sensors on the removal of carbon dioxide in high frequency oscillatory and jet ventilation

Abstract

For the comfortable and safe use of high-frequency ventilation (HFV) it is suitable to use a system for continual monitoring of inspiratory and expiratory gas flow especially for calculating tidal volumes. The orifice plate is one of the usable solutions for experimental practice. But the orifice plate causes an increase in flow resistance in the ventilation circuit, which may affect the elimination of CO2 from the patient’s lungs. Proper compensation for the pressure losses caused by the orifice plate is then necessary.