There are relatively few large studies describing perioperative complications in children. In this issue Gleich et al. describe the complication rates after perioperative arterial cannulation in children. In this single-center retrospective study, data were reviewed for all children aged less than 18 yr receiving anesthesia between 2006 and 2016. A total of 5,142 cannulations were performed in 4,178 children. Two-thirds of the cannulations were radial, and about 30% were femoral. There were 11 major complications, all when the femoral artery was cannulated and all in children less than 5 yr of age. Eight of the major complications were vascular, and three were infectious. The vast majority of femoral cannulations were for cardiac procedures.

The data would imply that radial cannulation is a relatively safe procedure in children. It might also be inferred that femoral cannulation...

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