Abstract
On a birth of preterm infants with respiratory distress syndrome (RDS), an emergent treatment should be applied with a surfactant, then a continuous positive airway pressure (CPAP) will be adopted to the infants in a newborn intensive-care unit (NICU). As the improvement of CPAP, we have developed a bypath nasal-CPAP device with a spontaneous respiration simulator (PT-2). The simulator is driven by a diaphragm and can supply the exponential, triangular, and half sin wave forms as the inspiratory breathing. In the present paper, we have tested a fundamental characteristic of the vertical typed BNCPAP for theses forms. The pressure fluctuation in CPAP cavity for these wave forms shows no difference in amplitude, but the wave phase was different. As a result, the vertical BNCPAP found new type device that is response respiration flow.
