Clinical Trial: Maternal Oxygen Use During Delivery and Cord Blood Superoxide Dismutase

Study Status: Completed
Recruit Status: Completed
Study Type: Interventional

Official Title: Maternal Oxygen Use During Delivery and Cord Blood Superoxide Dismutase: A Randomized Controlled Trial

Brief Summary: When exposed to oxygen immediately after birth, newborns suffer from an oxidative stress with a significant decrease in serum concentration of the anti-oxidant enzyme superoxide dismutase. This oxidative stress has been consequently linked to the development of adverse outcomes in both premature and full term infants. In this study, we examined the effect of oxygen administration to delivering mothers immediately before and during labor on the newborn. In this randomized trial, we planned to measure superoxide dismutase in the umbilical cord blood when mothers received and did not receive oxygen..

Detailed Summary:

We conducted a prospective randomized controlled clinical trial on a cohort of delivering women who were admitted to the Childbirth center at the George Washington University Hospital. This study has been approved by the Institutional Review Board of the George Washington University and consents were obtained from all subjects before enrollment. All of the enrolled subjects met the following criteria: a) uncomplicated pregnancy, b) term gestational age from completed 37 weeks to 42 weeks, and c) normal spontaneous vaginal delivery (NSVD) or elective caesarean section. Pregnant women were excluded from this study if they had any of the following: a) hypertension, or eclampsia, b) pregnancy induced diabetes, c) anemia, d) other medical or surgical complications during the current pregnancy, e) rupture of amniotic membranes for more than 18 hours, f) history of infants with invasive group B Streptococcal disease in previous pregnancies, g) fetal distress before delivery and h) suspected chromosomal, and structural anomalies or congenital infections. We collected data on maternal history (age, race, parity and type of anesthesia) and birth history (anthropometric measurements, gestational age, sex, and Apgar scores).

Randomization: Once enrolled in the study, all of the subjects were randomly assigned to one of two groups using the sealed opaque envelopes technique. A nasal cannula was attached to all subjects and was connected to a flowmeter covered by a metal foil so that the managing obstetricians were not aware which group the particular subject belongs to. The Oxygen Group participants received 100% oxygen at 2 litters/minute starting at least 30 minutes before delivery. The Control Group participants had their nasal cannula still attached to a flowmeter that was turned off. Nasal cannula was disconnected from participants after delivery.

Same as current

Current Secondary Outcome: Superoxide dismutase concentration in maternal venous blood after delivery [ Time Frame: within 4 hours ]

Original Secondary Outcome: Same as current

Information By: George Washington University

Dates:
Date Received: December 21, 2009
Date Started: February 2007
Date Completion:
Last Updated: January 4, 2010
Last Verified: December 2009