Postoperative apnea in infants.

This is a review of 127 neonates evaluated for postoperative apnea and bradycardia (A&B) after inguinal surgery. The patients could be divided into three groups based on postconceptional age (PCA) at operation. Ten of 29 patients operated on at PCA of 33 to 39 weeks developed episodes of A&B. Preoperative assessment was not reliable in their identification. In the second group of 54 patients at PCA 40 to 44 weeks, 8 developed A&B, whereas in the third group of 44 patients at PCA of 45 to 60 weeks 1 patient developed A&B. In the latter two groups preoperative assessment identified all patients at high risk. We conclude that after PCA of 40 weeks patients at risk for A&B can be identified preoperatively. Patients operated on up to 39 weeks PCA should all be observed in the hospital.