This study is to investigate the effect of a wide range of assistance levels on respiratory pattern, breathing variability including tidal volume and peak inspiratory pressure during neurally adjusted ventilatory assist (NAVA) in preterm infants. The investigators also aim to explore whether the effects of NAVA on the electrical activity of diaphragm (Edi) signal amplitude, work of breathing and comfort of preterm infants.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
SUPPORTIVE_CARE
Masking
NONE
Enrollment
14
Inha University Hospital
Incheon, South Korea
maximum Edi
mean of recorded maximum electrical activities in the middle 2 min duration out of the total 10 min period
Time frame: the middle 2 minutes duration out of the total interval of 10 minutes
comfort score
calculated score of premature infant pain profile (PIPP) from the recorded video, heart rates and oxygen saturation
Time frame: the 5-min point in the total 10-min period
peak inspiratory pressure
mean of recorded peak inspiratory pressures in the middle 2 min duration out of the total 10 min period
Time frame: the middle 2 minutes duration out of the total interval of 10 minutes
tidal volume
mean of recorded expiratory tidal volumes in the middle 2 min duration out of the total 10 min period
Time frame: the middle 2 minutes duration out of the total interval of 10 minutes
inspiratory time in excess
mean of calculated excessive inspiratory times from the calculation ((ventilator pressurization time-neural inspiratory time)/neural inspiratory time) from the middle 2 min duration out of the total 10 min period
Time frame: the middle 2 minutes duration out of the total interval of 10 minutes
electrical time product
mean of calculated electrical time product from the middle 2 min duration out of the total 10 min period
Time frame: the middle 2 minutes duration out of the total interval of 10 minutes
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