Explore of developmental index for infant sleep between premature and one year old

2018 Fiscal Year Final Research Report

• Project/Area Number: 15H05086
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Lifelong developmental nursing
• Research Institution: Nagasaki University
• Principal Investigator: ETO Hiromi 長崎大学, 医歯薬学総合研究科(保健学科), 教授 (10213555)
• Research Collaborator: HORIUCHI Shigeko ; NISHIHARA Kyoko
• Project Period (FY): 2015-04-01 – 2019-03-31
• Keywords: 早産児 / 睡眠・覚醒 / 睡眠発達 / 行動分析 / 乳児 / ビデオソムノグラフィ / ディベロップメンタルケア / 乳幼児突然死症候群

Outline of Final Research Achievements

This study examined preterm infants' sleep development during NICU/GCU hospitalization to one year after birth. We examine quiet sleep, active sleep, and wakefulness during their first one year.
During hospitalization, it was recognized decrease of Active sleep (REM sleep) , increase of Quiet sleep (NREM sleep) , and self-soothing ability. The sleep developed over time, and the circadian rhythm was formed around 25 weeks after birth. However, it was suggested that more Active sleep and delay of the circadian rhythm formation compare to infants after the same life.

Free Research Field

母性看護・助産学

Academic Significance and Societal Importance of the Research Achievements

本研究では、早産児の生後早期の入院中から1歳までの継続した睡眠覚醒の発達を示した。早産児の１年間のフォローアップという点では、対象数が少数ではあったが貴重であり、学術的意義は大きいと考える。また、ビデオ録画という客観的データを用いて、睡眠発達を示すことができた点では本邦初であり、サーカディアンリズムの形成時期などを分析し、今後のディベロップメンタルケアにつながる視点を得られた点では意義がある。