Article Text

other Versions

Download PDFPDF
Lactate as a predictor of mortality in Malawian children with WHO-defined pneumonia
  1. Bharat Ramakrishna1,
  2. Stephen M Graham1,2,
  3. Ajib Phiri2,
  4. Limangeni Mankhambo2,
  5. Trevor Duke1,3
  1. 1Centre for International Child Health, University of Melbourne, Department of Paediatrics and Murdoch Children's Research Institute, Royal Children's Hospital, Melbourne, Australia
  2. 2Department of Paediatrics and Malawi-Liverpool-Wellcome Trust Clinical Research Programme, University of Malawi College of Medicine, Blantyre, Malawi
  3. 3Intensive Care Unit, Royal Children's Hospital, Melbourne, Australia
  1. Correspondence to Professor Trevor Duke, Centre for International Child Health, University of Melbourne, Department of Paediatrics, Royal Children's Hospital, Flemington Road, Parkville, Victoria, 3052, Australia; trevor.duke{at}rch.org.au

Abstract

Objectives To determine whether blood lactate measured at the time of presentation to hospital predicted outcome in children with pneumonia in Malawi, and to understand the factors associated with high blood lactate concentrations in pneumonia.

Design Analysis of data from a prospective study of children presenting to Queen Elizabeth Central Hospital, Blantyre, with WHO-defined severe or very severe pneumonia.

Results Among 233 children with pneumonia, the median serum lactate concentration was 2.7 mmol/l (IQR 1.8–4.4 mmol/l). 77 children (33%) had a lactate concentration of 2.1–4.0 mmol/l, and 72 children (31%) had a lactate concentration >4.0 mmol/l. 92% of children who died (23/25) had lactate >2.0 mmol/l at the time of admission to hospital. There were 10 deaths (13%) among 77 children who had a serum lactate concentration of 2.1–4.0 mmol/l; and 13 deaths (18%) in the 72 children who had lactate >4.0 mmol/l. The relative risk of death if the lactate level was above 2 mmol/l was 7.48 (1.72–32.6); sensitivity 0.92, specificity 0.39, positive predictive value 0.15, negative predictive value 0.98. Multivariable analysis showed that hypoxaemia, hyperlactataemia and age ≤12 months were independent risk factors for death from pneumonia.

Conclusions Used in conjunction with clinical risk factors and pulse oximetry for measuring oxygen saturation, lactate could play an important role in identifying the sickest patients with pneumonia in developing countries.

Statistics from Altmetric.com

Request Permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.

Footnotes

  • Competing interests None.

  • Ethics approval University of Malawi College of Medicine Research and Ethics Committee, and the Liverpool School of Tropical Medicine Research and Ethics Committee.

  • Provenance and peer review Not commissioned; externally peer reviewed.