Assessment the Effect of Maternal Oxygen Administration on Umbilical Cord Blood Gas Values During the Second Stage

• Main Authors: Mahnaz Yavangi, Tayebeh Artimani
• Format: Article
• Language: fas
• Published: Hamadan University of Medical Sciences 2002-12-01
• Series: پزشکی بالینی ابن سینا
• Subjects: blood gas analysis / fetal blood / labor stage; second
• Online Access: http://sjh.umsha.ac.ir/article-1-764-en.html

This study was conducted to assess the role of maternal oxygen    administration during the second stage of labor on umbilical cord blood gas    values.  This study was done in Fatemieh hospital on 160 pregnant women    who were admitted for vaginal delivery and had the inclusion criteria.           A group of 80 women with term pregnancy were administrered oxygen    during the second stage of labor and another group of 80 women with    term pregnancy acted as control (Randomized clinical trial). Umbilical cord    blood gas values were measured immediately  after birth. Apgar score and    duration of oxygen administration of two groups were documented. Blood    gas values , apgar score , duration of oxygen therapy , duration of second    stage of labor also were recorded.           In the case group: The umbilical artery pH value was 7.25 (7.06-7.38) and    umbilical vein pH was > 7.31 (7.13-7.45). Umbilical artery pH in the control    group was 7.28 (7.08-7.96) and umbilical vein pH was 7.31 (7.02-7.44). There    was no statistically difference between means of umbilical cord blood gas    values of the groups (case and control , P>0.05). There was perfect negative    correlation between umbilical cord blood gas values and duration of    oxygen administration (P<0.001 , r =-0.5).           In fact oxygen administration in second stage of labor has not any    effect on cord blood gas analysis , provided that no clinical evidence of    danger for mother or fetus present. Besides prolonged oxygen    administration can cause  decrease in arterial pH.