エアーカーテンを利用した早産児用呼吸センサー

―HNCPAP素子の新特徴―

抄録

In this paper, in order to investigate the characteristics of the HNCPA device , it is attached to a spontaneous breathing simulator for newborns (PT-2), and the experimental results are shown by changing the tidal volume in three different breathing modes. Experiments were performed in 1 ml increments with a ventilation range of 2 ml to 8.6 ml. AS a result, fluctuating alveolar pressure waveform, flow waveform , and fluctuating Cpap pressure waveform were obtained at all tidal volumes. From this, it was found that it can be used for very low weight infants. Next, the fluctuating alveolar pressure waveform, flow waveform, and fluctuating Cpap waveform were superimposed on the same graph for each respiratory mode, and their relationships were investigated in detail. The maximum depressurization in the fluctuating Cpap waveform was 0.13 seconds in Ex mode, 0.18 seconds in HS mode, and 0.3 seconds in Tri mode, respectively, from the start of inspiration. From the flows at maximum decompression time in three different breathing modes, the flow conversion coefficient Cf= -2±0.2 （L/min）/-100 Pa was calculated. Using this flow conversion coefficient, it has become possible to estimate the airway flow and airway flow waveform of inhalation air in three different breathing modes. From this result, it was found that this HNCPAP device has a new feature as a respiratory sensor.