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Journal of Perinatal Medicine

Official Journal of the World Association of Perinatal Medicine

Editor-in-Chief: Dudenhausen, MD, FRCOG, Joachim W.

Ed. by Bancalari, Eduardo / Chappelle, Joseph / Chervenak, Frank A. / D'Addario , Vincenzo / Genc, Mehmet R. / Greenough, Anne / Grunebaum, Amos / Konje, Justin C. / Kurjak M.D., Asim / Romero, Roberto / Zalud, MD PhD, Ivica

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Volume 44, Issue 7


Examiner’s finger-mounted fetal tissue oximetry: a preliminary report on 30 cases

Toshiyuki Uchida / Naohiro Kanayama / Mari Mukai / Naomi Furuta / Hiroaki Itoh / Hikaru Suzuki / Masatsugu Niwayama
  • Department of Electrical and Electronics Engineering, Shizuoka University, Japan
  • Research Institute of Electronics, Shizuoka University, Japan
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2015-03-09 | DOI: https://doi.org/10.1515/jpm-2014-0297



To describe preliminary experience with a finger-mounted fetal tissue oximetry probe during the 2nd stage of labor.

Materials and methods:

A total of 30 term pregnant women without pregnancy complications were recruited. We measured fetal tissue oxygen saturation (FtO2) by using a finger-mounted fetal tissue oximetry during cervical examinations in the 2nd stage of labor. The data capturing rate of FtO2 and the interclass correlation coefficient were also examined. The mean FtO2 was compared to the neonatal condition assessed by the levels of umbilical cord blood.


FtO2 was obtained in all cases, regardless of wetness, hair color, the part of the fetal head that was exposed, rotation of the fetus, color of amniotic fluid, and caput succedaneum. The mean FtO2 was 65.5%±8.58% in normal neonates [Apgar score >7 (1 min), n=25]. The mean FtO2 was significantly correlated with umbilical cord arterial pH (r=0.52, P=0.0030, n=30), but not with umbilical cord arterial partial pressure of oxygen. The interclass correlation coefficient was 0.94.


Tissue oxygen saturation of the fetal head was obtained easily by the examiner’s finger-mounted fetal tissue oximetry.

Keywords: Examiner; fetal tissue oximetry; fetal tissue oxygen saturation; finger pulp; near-infrared spectroscopy; parturition


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About the article

Corresponding author: Naohiro Kanayama, MD, PhD, Department of Obstetrics and Gynecology, Hamamatsu University School of Medicine, 1-20-1 Handa-yama, Hamamatsu 431-3192, Japan, Tel.: +81-453-435-2309, Fax: +81-453-435-2308, E-mail:

Received: 2014-09-04

Accepted: 2015-02-10

Published Online: 2015-03-09

Published in Print: 2016-10-01

The authors stated that there are no conflicts of interest regarding the publication of this article.

Citation Information: Journal of Perinatal Medicine, Volume 44, Issue 7, Pages 745–749, ISSN (Online) 1619-3997, ISSN (Print) 0300-5577, DOI: https://doi.org/10.1515/jpm-2014-0297.

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