B302 ナーザルCPAP素子内流れの可視化

抄録

Respiration assist for preterm infants by nasal CPAP (Continuous Positive Airway Pressure) (nCPAP) is one of the important medical treatments. Some devices of nCPAP have been developed, however they give some kinds of installation load to the infants. In order to decrease the load, the down sizing of the devices and the improvement of the installation method are required. A new type device of nCPAP adapting these requirements is proposed in present report. The device operates fluid-dynamically in switching mode of jet flow. The fundamental characteristics in fluid dynamics have been investigated experimentally by flow visualization and quantitative PIV measurement. The stable repetition of switching mode of jet flow in accordance with the pressure fluctuation in the model of the nasal cavity has been obtained by the experiments. The results obtained give useful knowledge for design of the nCPAP device for clinical use.