CYCLED LIGHT VERSUS NEAR DARKNESS IN THE PRETERM INFANT

光影响生理参数、身体生长、睡眠-觉醒状态， 日/夜循环和早产儿的感觉系统。本研究 将研究循环光和连续近黑暗对 早产儿的生长和发育，他们将被跟踪， 进入新生儿重症监护室直至足月的时间 或者出院早产儿小于31周妊娠 进入东南地区三级护理教学医院， 有资格参与。婴儿将被随机分配到一个 3组：第1组将从出生开始接受连续的近黑暗 直至妊娠32周，随后进行循环光照，第2组将 从出生开始就接受循环光，第3组将接受连续的近距离光照射。 出生时的黑暗结果指标将包括身体发育 （身高、体重、头围）、住院时间、 呼吸机天数，睡眠-觉醒状态组织，昼夜组织 生理参数（如心率）和神经行为 组织（例如视觉和听觉功能）。这些发现是 预期指示循环光的最适当定时。

Light affects physiologic parameters, physical growth, sleep-wake states, day/night cycling, and sensory systems of preterm infants. This study will examine the effects of cycled light and continuous near darkness on the growth and development of preterm infants, who will be followed from the time of admission into the neonatal intensive care nursery until term or hospital discharge. Preterm infants less than 31 weeks gestation admitted to a Southeastern regional tertiary care teaching hospital will be eligible for participation. Infants will be randomly assigned to one of 3 groups: Group 1 will receive continuous near darkness from birth until 32 weeks gestation with subsequent cycled light, Group 2 will receive cycled light from birth, and Group 3 will receive continuous near darkness from birth. Outcome measures will include physical growth (height, weight, head circumference), length of hospital stay, number of ventilator days, sleep-wake state organization, day/night organization of physiologic parameters (e.g. heart rate) and neurobehavioral organization (e.g. visual and auditory functioning). The findings are expected to indicate the most appropriate timing of cycled light.