Malcolm G, Cohen G, Henderson-Smart D
Department of Perinatal Medicine, King George V Memorial Hospital for Mothers and Babies, Camperdown, New South Wales, Australia.
J Paediatr Child Health. 1994 Feb;30(1):45-9. doi: 10.1111/j.1440-1754.1994.tb00565.x.
In 22 infants continuous measurements were made of the concentration of carbon dioxide (CO2) in inspired air during sleep. Evidence was found of CO2 enrichment of inspired air in certain environmental conditions. The levels achieved were not sufficiently high to acutely endanger an infant. Carbon dioxide concentrations as high as 2-3% were observed in the prone position when the infant's head was under a blanket and when the lower face was obscured by bedding. Sleeping prone on a sheepskin also resulted in an increased concentration of CO2 but to a lesser extent than being under a blanket. In awake infants the presence of a pacifier also promoted an excess of CO2 in the inspired air, both in the prone and supine positions. The physiological and clinical implications of these findings, in relation to the Sudden Infant Death Syndrome (SIDS), are unknown and warrant investigation.
对22名婴儿在睡眠期间进行了吸入空气中二氧化碳（CO2）浓度的连续测量。发现在某些环境条件下，吸入空气存在二氧化碳富集现象。所达到的水平并未高到会急性危及婴儿的程度。当婴儿头部在毯子下面且下脸被被褥遮住时，俯卧位时观察到二氧化碳浓度高达2 - 3%。在羊皮上俯卧睡眠也会导致二氧化碳浓度升高，但程度低于在毯子下面。在清醒的婴儿中，无论俯卧位还是仰卧位，使用安抚奶嘴也会促使吸入空气中二氧化碳过量。这些发现与婴儿猝死综合征（SIDS）相关的生理和临床意义尚不清楚，值得进行研究。
