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Arch Dis Child Fetal Neonatal Ed 2005;90:F523-F526 doi:10.1136/adc.2004.064717
  • Original article

Monitoring of end tidal carbon dioxide and transcutaneous carbon dioxide during neonatal transport

  1. D G Tingay1,2,4,
  2. M J Stewart1,2,3,
  3. C J Morley1,3,4
  1. 1Neonatal Emergency Transport Service (Victoria), Royal Women’s Hospital, Carlton, Victoria 3053, Australia
  2. 2Department of Neonatology, Royal Children’s Hospital, Parkville, Victoria 3052, Australia
  3. 3Department of Neonatology, Royal Women’s Hospital
  4. 4Murdoch Childrens Research Institute, Parkville, Victoria 3052, Australia
  1. Correspondence to:
    Dr Tingay
    Department of Neonatology, Royal Children’s Hospital, Flemington Rd, Parkville, Victoria 3052, Australia; david.tingayrch.org.au
  • Accepted 22 April 2005
  • Published Online First 29 April 2005

Abstract

Objective: To assess the accuracy of measurements of end tidal carbon dioxide (CO2) during neonatal transport compared with arterial and transcutaneous measurements.

Design: Paired end tidal and transcutaneous CO2 recordings were taken frequently during road transport of 21 ventilated neonates. The first paired CO2 values were compared with an arterial blood gas. The differences between arterial CO2 (Paco2), transcutaneous CO2 (TcPco2), and end tidal CO2 (Petco2) were analysed. The Bland-Altman method was used to assess bias and repeatability.

Results: Petco2 correlated strongly with Paco2 and TcPco2. However, Petco2 underestimated Paco2 at a clinically unacceptable level (mean (SD) 1.1 (0.70) kPa) and did not trend reliably over time within individual subjects. The Petco2 bias was independent of Paco2 and severity of lung disease.

Conclusions: Petco2 had an unacceptable under-recording bias. TcPco2 should currently be considered the preferred method of non-invasive CO2 monitoring for neonatal transport.

Footnotes

  • Published Online First 29 April 2005

  • Competing interests: none declared

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