Abstract
Objective
To investigate the association between elevated umbilical arterial lactate at birth and electronic fetal monitoring (EFM) characteristics at admission and in the beginning of the active phase of labor.
Study design
Nested case-control study within a prospective cohort of laboring patients at term who achieved active labor. Neonates with umbilical arterial lactate ≥ 4 mmol/L (cases, n = 119), were matched 1:1 to controls with lactate < 4 mmol/L. EFM patterns were compared with multivariable logistic regression.
Result
There were no differences in EFM parameters in the first 60 minutes after admission. At the beginning of active labor, 13.5% of cases and 26.1% of controls had always category I tracings, adjusted odds ratio 0.48, 95% confidence interval 0.24–0.94). Cases were less likely to have an always category I tracing from admission into the active phase.
Conclusion
Elevated umbilical arterial lactate at birth is associated with distinct EFM patterns early in the labor course.
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Acknowledgements
Presented in poster format at the 37th Annual Pregnancy Meeting, Society for Maternal-Fetal Medicine, 23–28 January 2017, Las Vegas, NV.
Author contributions
JIR: played an important role in interpreting the results, drafted the manuscript, approved the final version. MJS: played an important role in interpreting the results, revised the manuscript, approved the final version. MGT: played an important role in interpreting the results, revised the manuscript, approved the final version. JDL: acquired and analyzed data, played an important role in interpreting the results, revised the manuscript, approved the final version. GAM: conceived and designed the work that led to the submission, revised the manuscript, approved the final version. AGC: conceived and designed the work that led to the submission, acquired the data, played an important role in interpreting the results, revised the manuscript, approved the final version.
Funding
This work was supported by the Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01: HD 06161619-01A1, PI Cahill).
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Rosenbloom, J.I., Stout, M.J., Tuuli, M.G. et al. Elevated umbilical cord arterial lactate at birth and electronic fetal monitoring characteristics on admission and in the active phase. J Perinatol 39, 481–487 (2019). https://doi.org/10.1038/s41372-019-0324-y
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DOI: https://doi.org/10.1038/s41372-019-0324-y