Closure of the complicated patent ductus arteriosus.

A technique for closure of the complicated ductus arteriosus is described which has proved both simple and safe. The technique embodies the use of profound hypothermia, low flow, and direct suture of the pulmonary end of the ductus arteriosus through a pulmonary arteriotomy. No operative deaths have occurred among 4 patients so treated, and no complications from air embolism or hemorrhage have been encountered.