Paediatric exhaled CO2 detector causes leaks

Tessa Martherus, Annika Den Hoed, Sophie J.E. Cramer, Ratna N.G.B. Tan, Stuart B. Hooper, Arjan B. Te Pas

Research output: Contribution to journalArticleResearchpeer-review


Objective: To assess leakage caused by the Pedi-Cap. Methods: Bench test I: Pedi-Caps were connected between the Neopuff and a test lung and placed underwater to detect the leak. Bench test II: The disposable Avea VarFlex Flow Transducer measured the leak. Retrospective analysis: recordings of intubations in the delivery room were analysed. Results: The (rippled) male end of the Pedi-Cap is the origin of the leak. In bench test I, 32% of the Pedi-Caps caused inevitable extensive leaks and 34% caused leaks that diminished after sealing the end. In bench test II (n=44) and the retrospective analysis (n=17), the flow transducer measured 22% (18-60) and 39% (8-82) leakage, respectively. Leakage decreased after removal of the Pedi-Cap (before vs after; 17% (7-75) vs 4% (2-10), p=0.004). Conclusion: The Pedi-Cap causes the leak which can compromise respiratory support. We recommend to remove the Pedi-Cap directly after change of colour and to be cautious when using the device as evaluation tool.

Original languageEnglish
Number of pages3
JournalArchives of Disease in Childhood: Fetal and Neonatal Edition
Publication statusAccepted/In press - 29 Oct 2019


  • endotracheal intubation
  • leak
  • Pedi-Cap
  • respiratory support

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