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Overnight pulse oximetry in normal children and in children undergoing adenotonsillectomy.

This study investigates the hypoxia that has been described during sleep in children admitted for adenotonsillectomy. Two hundred and twenty-two randomly selected children and 33 children awaiting adenotonsillectomy had overnight pulse oximetry performed at home. Children undergoing surgery had a second study in hospital on the eve of surgery and a third at home 3 months post-operation. Analysis of pulse oximetry data failed to detect a clinically significant difference in oxygen saturation levels between these populations. Snoring is reported in 76% of children undergoing adenotonsillectomy and 11% of the normal population. Sleep apnoeic episodes occur in 52% of children prior to surgery compared with 8% of the normal population. Overnight pulse oximetry has failed to differentiate children with symptoms suggestive of obstructive sleep apnoea from the normal population. Its use as a screening procedure should be used with caution until more is known about its ability to predict significant disease.