健康足月新生儿生后10分钟内血氧饱和度及心率研究

摘要

目的：探讨健康足月新生儿在出生后10 min内血氧饱和度（SpO2）及心率（HR）的变化及参考值。方法采用脉压氧饱和度仪测定203例正常足月新生儿（阴道产97例，剖宫产106例）在正常呼吸时的血SpO2及HR，描绘SpO2及HR在生后1~10分钟的第10~95百分位图表。结果生后第1分钟，健康新生儿血SpO2的P10、P50和P95分别为62%、71%和85%；HR的P10、P50和P95分别为66次/min、98次/min和126次/min。SpO2上升至90%的中位数时间为5 min。健康新生儿在出生后1~5 min HR随时间上升趋势明显，之后趋于平稳。结论可参考SpO2及HR，并结合临床表现综合评估新生儿，谨慎用氧，避免高氧或低氧血症对新生儿造成的损伤。%Objective To establish the reference ranges of preductal oxygen saturation (SpO2) and heart rate (HR) for healthy neonates in 10 minutes after birth. Methods SpO2 and HR recordings of 203 term neonates (vaginal group:n=97 and ce-sarean group:n=106) with regular respiratory pattern were evaluated. 10th-95th percentile charts of SpO2 and HR from 1 minute to 10 minutes after birth were drawn. Results The SpO2 of P10, P50 and P95 at 1 minute after birth was 62%, 71%and 85%respec-tively. The heart rate of P10, P50 and P95 at 1 minute after birth was 66 bpm, 98 bpm and 126 bpm respectively. The median time for SpO2 to reach 90%was 5 minutes. The rising trend of HR was evident during 1-5 minutes after birth, and then the HR leveled off. Conclusions The status of newborn can be assessed using the charts of SpO2 and HR combined with clinical manifestations. The oxygen intervention should be used with care to avoid damage caused by hyperoxemia and hypoxemia.