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Westgren, M.K.K., Ek, S., Grunevald, C., Kublickas, M., Naka, K., Wolff, K. and Persson, B. (1998) Lactate compared with pH analysis at fetal scalp blood sampling: A prospective randomised study. British Journal of Obstetrics and Gynaecology, 105, 29-33. http://dx.doi.org/10.1111/j.1471-0528.1998.tb09346.x

has been cited by the following article:

• TITLE: Accuracy of a hand-held lactate meter in measuring umbilical cord blood lactate at all lactate levels

  AUTHORS: Seng C. Chua, May Y. W. Wong, Tina Y. Su, Mifanwy Reece

  KEYWORDS: Agreement; Blood Gas Analyser; Comparison; Lactate; Umbilical Cord Blood

  JOURNAL NAME: Open Journal of Obstetrics and Gynecology, Vol.4 No.1, January 16, 2014

  ABSTRACT: Objective: Fetal scalp lactate has largely replaced pH analysis to assess intrapartum hypoxia. Many obstetrics units use hand-held lactate meters to measure umbilical blood because of its affordability and ease of use. We sought to investigate the agreement of Lactate ProTM with a reference method blood gas analyser and to determine its usefulness with a recommended cutoff value of 4.8 mmol/L. Methods: Prospective study carried out at a tertiary institution where 237 arterial and 233 venous samples from umbilical cords of 16 elective caesarean and 285 emergency deliveries were measured using Lactate ProTM and ABL735 Sesries Acid-Base analyser. Limits of agreement were analysed using Bland-Altman plots. Results: Lactate ProTM differentiated fewer deliveries as “high risk” (≥4.8 mmol/L) and more as “low risk” (TM) were –1.46 - 0.97 mmol/L for arterial lactate levels arterial lactate levels ≥ 4.8 mmol/L. Conclusion: There was a poorer agreement between the two devices at higher lactate values. Lactate ProTM underestimates by up to 3.2 mmol/L; a 4.8 mmol/L reading may actually signify a lactate level of 8.0 mmol/L, indicating severe metabolic acidosis. We caution the use of this device in assessing fetal lactate levels.