Journal
JOURNAL OF OBSTETRICS AND GYNAECOLOGY RESEARCH
Volume 44, Issue 3, Pages 397-407Publisher
WILEY
DOI: 10.1111/jog.13547
Keywords
amniotic fluid interleukin-8; body mass index; cerclage; maintenance tocolysis; preterm labor
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AimWe evaluated whether maintenance tocolysis (intravenous ritodrine hydrochloride and/or magnesium sulfate) was effective in cases of spontaneous preterm labor with intact membranes. MethodsOne hundred and thirty preterm labor patients who reached 36weeks of gestation by maintenance tocolysis were selected. Immediate delivery (ID) after ceasing maintenance tocolysis was defined as an effective case'. The correlated factors between ID and no immediate delivery (NID) were statistically analyzed. ResultsThirty-six patients delivered < twodays after ceasing maintenance tocolysis (27.7%) and were defined as effective cases. Multiple logistic regression analysis revealed that amniotic fluid interleukin-8 at admission ( 2.3ng/mL; odds ratio [OR] 5.6, 95% confidence interval [CI] 2.1-17.6; P<0.001), pre-pregnancy body mass index ( 21.4; OR 5.3, 95% CI 2.0-16.2; P<0.001) and cerclage (OR 3.6, 95% CI 1.1-11.8; P=0.028) were independent factors correlated with ID (< 2days). ConclusionMaintenance tocolysis may be effective in limited cases with mild intra-amniotic inflammation, in lean women and in cerclage cases. Maintenance tocolysis should be ceased in cases without these clinical factors when clinical symptoms disappear.
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