Abstract
Nasal continuous positive airway pressure (Nasal-CPAP) is frequently used in the care for the preterm neonates.In previous report,We had developed a nasal CPAP device with bypath (BNCPAP) of vertical allocated type with additionally compiled HFOV function. In the present report, we have optimized the positions terms of Two relation with Two holes. As the result, CPAP pressure increases about 40Pa during respiration phase.