Effects of mode of delivery on pro-oxidant/antioxidant balance in fetal circulation

Maternal and Neonatal Evaluation of Derived Reactive Oxygen Metabolites and Biological Antioxidant Potential in Donkey Mares and Foals

Our aim was to measure the concentrations of derived reactive oxygen metabolite (d-ROMs) and biological antioxidant potential (BAP) of donkey mares and foals at delivery and to verify the protective role of the placenta against fetal oxidative stress. A total of 15 Amiata jennies with a physiological gestation length and delivery were included together with 17 foals (two twin foalings). After delivery, maternal and foal venous blood samples were collected along with blood from the artery. Circulating lactate and plasma d-ROMs and BAP were evaluated. The Wilcoxon test for paired data was applied to verify differences in d-ROMs and BAP values, while the Spearman test was used to evaluate correlations. A significantly higher d-ROMs concentration was found in jennies compared to their foals, and to the umbilical artery blood. The BAP was higher in jennies than in their foals, but no differences were observed in the umbilical artery blood. No difference was found between foals and their umbilical cord. Blood lactate was higher in foals than in their dams. Positive correlations were found between mares and umbilical cord for BAP and d-ROMs, and between mares and foals and umbilical cord for BAP. In conclusion, the placenta may be a protective factor for the fetus. As with equine foals, the antioxidant system of donkey foals does not seems to be effective at birth.

Maternity Nurses' Knowledge about Sudden Unexpected Postnatal Collapse and Safe Newborn Positioning

PURPOSE

Sudden unexpected postnatal collapse (SUPC) of healthy newborns in the first 2 days of life is increasing. These types of adverse events are known to be associated with unsafe positioning during skin-to-skin contact and breastfeeding. The purpose of the study was to determine maternity nurses' knowledge about SUPC and safe newborn positioning.

DESIGN

Nurses who participate in a hosted listserv were solicited to complete a questionnaire.

METHODS

An email with an embedded link to a 20-item questionnaire, the SUPC and Safe Positioning Knowledge Assessment Tool, and 16 demographic questions was sent to 605 maternity nurses in the United States who are part of a Perinatal Listserv for members of the Association of Women's Health, Obstetric and Neonatal Nurses. Scores were analyzed by mean, standard deviation, and percent correct answers.

RESULTS

Fifty questionnaires were initiated (response rate of 8.2%), and 36 completed questionnaires (response rate of 5.9%) were analyzed. Maternity nurses' knowledge of SUPC was less than their knowledge of safe newborn positioning (61% correct vs. 72% correct; p < 0.001).

CLINICAL IMPLICATIONS

Maternity nurses need more information about SUPC and safe newborn positioning, including risk factors, and effective strategies to reduce risk of preventable newborn harm.