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The association between fetal head position prior to vacuum extraction and pregnancy outcome
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Journal Article
The association between fetal head position prior to vacuum extraction and pregnancy outcome
2016
Overview
Objective
To estimate the association of fetal head position prior to vacuum extraction (VE) and pregnancy outcome.
Study design
A retrospective cohort study of singleton pregnancies who underwent VE. Pregnancy outcome of occipito-anterior (OA) position of the fetal head was compared to those with occipito-posterior (OP) position.
Results
Amongst overall 12,063 women undergoing trial of labor, there were 1118 (9.2 %) VE deliveries. Of them, 871 (77.9 %) had OA and 247 (22.1 %) had OP position of the fetal head. Except for a higher rate of nulliparity in the OA group, no significant differences between the groups regarding pregnancy complications and birthweight were noted. In the OP group, there were higher rates of prolonged 2nd-stage of labor as an indication for VE (49.8 vs. 36.5 %,
p
< 0.001) and single detachment of vacuum cup (11.3 vs. 6.7 %,
p
= 0.02) without any increased risk of failed extraction. Higher risks for sub-galeal hematoma (aOR = 4.36,
p
= 0.03) and low 5-min Apgar score (aOR = 4.63,
p
= 0.02) were observed in the OP group with otherwise similar rates of adverse maternal and neonatal outcomes.
Conclusion
Among women undergoing VE, OP position is associated with higher rate of vacuum cup detachment, low 5-min Apgar score and increased risk for sub-galeal hematoma with otherwise similar rates of adverse maternal and neonatal outcomes.
Publisher
Springer Berlin Heidelberg,Springer Nature B.V
