title: Transabdominal measurement of placental oxygenation by near-infrared spectroscopy.
abstract: We evaluated the clinical usefulness of near-infrared spectroscopic quantitative measurement of placental tissue oxygenation for noninvasive estimation of uteroplacental function in pregnant women. We performed a prospective observational clinical study. Women without complications (N = 15) and women with pregnancy-induced hypertension (PIH; N = 6) were enrolled. Measurements of placental tissue oxygenation index (TOI) using NIRO-300 (Hamamatsu Photonics, Hamamatsu City, Japan) were recorded. The mean TOI in women without complications was 72.36 +/- 5.36% and 80.28 +/- 2.78% in pregnant women with PIH. The mean TOI in pregnant women with PIH was higher than that of pregnant women without complications. There were no differences in the TOI in relation to gestational age at onset of PIH, forms of PIH, or severity of hypertension. Higher TOIs in pregnant women suggest the reduced ability of the placental function. Monitoring the TOI by near-infrared spectroscopic quantitative measurement may have a high potential for clinical application, particularly in prenatal management.
authors: Department of Obstetrics and Gynecology, International Medical Center of Japan, Shinjuku-ku, Tokyo, Japan. jkakogaw@imcj.hosp.go.jp
authors: Jun
authors: J
authors: Kakogawa
authors: Kazuhiro
authors: K
authors: Sumimoto
authors: Takakazu
authors: T
authors: Kawamura
authors: Shigeki
authors: S
authors: Minoura
authors: Naohiro
authors: N
authors: Kanayama
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D010100:Oxygen / Q000032:analysis*; D010920:Placenta / Q000378:metabolism*; D021041:Placental Circulation; D011247:Pregnancy; D019265:Spectroscopy, Near-Infrared
chemical_list: D010100:Oxygen