低体重新生児における体外循環非使用心房中隔欠損作成術

摘要

We report a surgical technique for off-pump atrial septectomy using a Rongeur forceps in the case of a newborn infant weighing less than 2,000 grams. The 6-day-old patient suffered from hypoplastic left heart syndrome with a restrictive interatrial communication. A purse-string suture was placed on the right atrium. A hand-made dull-tipped cannula was inserted into the right atrium through the suture to probe the interatrial communication. Monitoring the pressure at the tip of cannula, we could clearly determine when the cannula tip entered the left atrium. Then, a Rongeur forceps was inserted instead of the cannula, and used to bite into the interatrial septum. It was removed slowly together with the resected atrial specimen. In this manner, an atrial septectomy can be performed without cardiopulmonary bypass ; this is far safer and easier than other procedures, such as the Blalock-Hanlon technique. This method can be performed in a small neonate as well as an older infant in whom balloon atrial septostomy is difficult.