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  • Title: Evaluation of point-of-care maternal venous lactate testing in normal pregnancy.
    Author: Maguire PJ, Finlay J, Power KA, Harley R, Mhurchú MN, Sheehan SR, Fanning RA, Turner MJ.
    Journal: J Matern Fetal Neonatal Med; 2016; 29(16):2607-10. PubMed ID: 26456421.
    Abstract:
    OBJECTIVE: There is little information about whether the established non-pregnant adult venous lactate reference range is appropriate for pregnancy. This prospective observational study examined whether the non-pregnant adult reference range is appropriate during pregnancy. METHODS: Women attending for routine prenatal appointments or elective cesarean delivery in a tertiary hospital were recruited. Clinical details were recorded and venous lactate concentration was measured using a point-of-care (POC) device. RESULTS: Of the 246 women, 199 were 6-18 weeks' gestation and 47 were 36-42 weeks' gestation. Mean lactate concentration was within the non-pregnant reference range in early and late pregnancy (0.86 SD ± 0.46 mmol/L and 1.15 SD ± 0.40 mmol/L, respectively). The mean time between phlebotomy and result was 6.1 SD ± 1.7 min. There was no correlation between lactate levels and either maternal age or time interval from tourniquet placement to lactate measurement. In women of 6-18 weeks' gestation positive bivariate relationships were found between lactate and BMI (p = 0.03, r = 0.158), earlier gestational age (p = 0.04, r = -0.145), and smoking (p = 0.01, r = 0.183), but these were not found in late pregnancy. CONCLUSIONS: The venous lactate reference range for the non-pregnant adult may be applied in pregnancy. Further studies should examine lactate dynamics in labor and postpartum.
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