日本未熟児新生児学会雑誌　第20巻　第2号　63～68頁（2008年）

日本未熟児新生児学会雑誌　20(2)：255-260；2008　

受付日：平成19．08．28

受理日：平成19．10．02

新生児仮死における上大静脈血流量（SVC flow）の検討

Superior Vena Cava Flow Analysis of Asphyxiated Neonates

和歌山県立医科大学附属病院　周産期医療センターNICU

Wakayama Medical University Hospital Perinatal Medical Center NICU

熊谷　健・樋口隆造・比嘉明日美・平松知佐子・杉本卓也・奥谷貴弘・吉川徳茂

Takeshi KUMAGAI，Ryuzo HIGUCHI，Asumi HIGA，Chisako HIRAMATSU，Takuya SUGIMOTO， Takahiro OKUTANI，Norishige YOSHIKAWA

Key Words：Neonate，SVC flow，asphyxia，HIE，cerebral hypothermia

　新生児仮死9例について上大静脈血流量をEvansの方法に従ってエコーで経時的に測定し検討した。短期予後不良群は生後5時間以内の上大静脈血流量が良好群に比べ有意に増加していた。脳血流自動調節能の障害が背景にあると推測された。

Approximately 80% of superior vena cava flow（SVC flow）is estimated to be returning from the brain in infants. We measured SVC flow by the method of Evans using echocardiograph in the asphyxiated neonates and studied the relationship between SVC flow and short term prognosis. The criteria for eligibility were identical in perinatal asphyxia as evidenced by fetal distress and Apgar score of 7 or less at 1-minutes. SVC flows were higher in the infant with poor outcome than those of good outcome within 5hrs after birth. We speculated that autoregulation of brain circulation was disturbed in the infants with severely asphyxiated neonates.