INGUINAL HERNIORRHAPHY IN YOUNG INFANTS - PERIANESTHETIC COMPLICATIONS AND ASSOCIATED PREANESTHETIC RISK-FACTORS

Study Objectives: (1) To prospectively observe and tabulate all perianesthetic complications in young infants undergoing herniorrhaphy with general anesthesia and (2) to identify all major postnatal complications and determine which, if any, might be significant risk factors for perianesthetic complications. Design: Prospective case control study: Setting: Columbus, Ohio, Children's Hospital, a teaching and tertiary referral center. Patients: One hundred two consecutive infants 60 weeks postconceptual age (PCA) or younger undergoing herniorrhaphy with general anesthesia. Interventions: None Measurements and Main Results: All perianesthetic complications occurring during anesthesia, in the postanesthesia care unit (PACU), during the remaining hospital stay, and within 30 days of anesthesia were recorded, and a detailed postnatal history was compiled. Fifty-five percent of 60 preterm infants [37 weeks gestational age (GA) or younger] and 50% of 42 term infants (older than 37 weeks GA) experienced at least one perianesthetic complication. Following discharge from the PACU, in-house complications were confined to the preterm group. Significant risk factors included a history of apnea, bradycardia, and ventilatory support for at least 24 hours after birth, mainly for respiratory distress syndrome. Conclusions: In a teaching hospital, prospectively observed perianesthetic complications can occur in more than 50% of infants 60 weeks PCA or younger undergoing herniorrhaphy with inhalation anesthesia. Infants younger than 49 weeks PCA with a significant preanesthetic risk factor should be monitored overnight for apnea and bradycardia.