Hale T M, Valea F A, Stelling J R, Roman G A
Department of Obstetrics and Gynecology, School of Medicine, State University of New York at Stony Brook 11794, USA.
Am J Perinatol. 1995 May;12(3):164-7. doi: 10.1055/s-2007-994442.
This study was done to measure the effect on inspiratory carbon dioxide (CO2) levels of infants exposed to the infant Crib Air (ICA) apparatus, a novel device which circulates room air within the infant's crib. Twenty-one healthy, sleeping infants and neonates (mean age = 14.7 weeks) were studied in a prospective crossover trial. All infants were studied lying face down or with the face placed passively to the side in their cribs. Inspiratory CO2 levels were recorded over a 30 minute period by measuring the concentration of CO2 immediately adjacent to the infants' nose and mouth. During the first 15 minute period, the baseline concentration of inspiratory CO2 was recorded. The infants were then exposed to the ICA apparatus in their cribs for 15 minutes and the concentrations of inspiratory CO2 were measured. Mean inspiratory CO2 levels in infants lying face down decreased from 8.5 to 1.4 mm Hg after ICA exposure (P < 0.001). Infants studied with their face placed passively to the side experienced a similar decrease in inspired CO2 concentrations. We conclude that the level of inspired CO2 by sleeping infants can be significantly reduced by the ICA regardless of the position of the infant's head.
本研究旨在测量暴露于婴儿床空气循环装置（ICA）的婴儿吸气二氧化碳（CO₂）水平的影响，ICA是一种在婴儿床内循环室内空气的新型装置。在一项前瞻性交叉试验中，对21名健康的睡眠婴儿和新生儿（平均年龄 = 14.7周）进行了研究。所有婴儿均面朝下或脸被动侧向一侧躺在婴儿床中进行研究。通过测量紧邻婴儿鼻子和嘴巴处的CO₂浓度，在30分钟内记录吸气CO₂水平。在最初的15分钟内，记录吸气CO₂的基线浓度。然后让婴儿在婴儿床中暴露于ICA装置15分钟，并测量吸气CO₂浓度。面朝下躺着的婴儿在暴露于ICA后，平均吸气CO₂水平从8.5毫米汞柱降至1.4毫米汞柱（P < 0.001）。脸被动侧向一侧进行研究的婴儿吸入的CO₂浓度也有类似下降。我们得出结论，无论婴儿头部位置如何，ICA均可显著降低睡眠婴儿的吸入CO₂水平。
