The need for a period of observation of infants born prematurely to monitor for oxygen desaturation, apnea, or bradycardia when positioned semireclined in car safety seats has been well established.1–3  Whether otherwise healthy term infants are at risk for similar episodes while positioned in car safety seats, however, has not been fully determined and warrants additional investigation. A recent study, published in this journal in which 50 term infants were monitored documented that when properly positioned semireclined in rear-facing car safety seats, the mean oxygen saturation levels declined significantly from 97% to 94% after 60 minutes. Also, 8% of these term infants had oxygen saturation values of <90% for longer than 20 minutes. A previous report of a series of selected term infants with preexisting health conditions believed to place them at risk for potential oxygen desaturation documented that 28.6% of those infants demonstrated oxygen saturations...

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