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Abstract
Objective: To evaluate umbilical cord blood interleukin (IL)-6 concentrations and the occurrence of fetal inflammatory response syndrome (FIRS) with respect to microbial invasion of the amniotic cavity (MIAC) and/or intraamniotic inflammation (IAI) in pregnancies complicated by preterm prelabor rupture of membranes (PPROM).
Methods: One-hundred-eighty-eight women with singleton pregnancies complicated by PPROM between gestational ages of 24 + 0 and 36 + 6 weeks were included in the study. Blood samples were obtained by venipuncture from the umbilical cord after the delivery of the newborn. The umbilical cord blood IL-6 concentrations were evaluated using ELISA kits. FIRS was defined as umbilical cord blood IL-6 > 11 pg/mL.
Result: Women with MIAC and IAI had higher IL-6 concentrations than women without these complications (with MIAC: median 18.1 pg/mL versus without MIAC: median 5.8; p < 0.0001; with IAI: median 32.9 pg/mL, versus without IAI: median 5.8; p < 0.0001). Women with IAI with MIAC and women with IAI without MIAC had the highest umbilical cord blood IL-6 concentrations (medians: 32.6 and 39.4 pg/mL) and rates of FIRS (78% and 67%).
Conclusions: IAI was associated with the highest umbilical cord blood IL-6 concentrations and rate of FIRS independent of the presence or absence of MIAC.
Declaration of interest
The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.
Funding information
This work was supported by the Faculty Hospital in Hradec Kralove (long-term organization development plan) and by Charles University in Prague, Faculty of Medicine in Hradec Kralove, Czech Republic, project “PRVOUK” P37/10.