Comparison of circle absorber and jacksonrees systems for paediatric anaesthesia

Deborah K. Rasch, Leonid Bunegin, John Ledbetter, Daniel Kaminskas

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


To evaluate effects of anaesthesia delivery systems on respiratory work in infants, we measured end-tidal PCO2 (PETCO2), transcutaneous PCO2 (PtcCO2) respiratory rate and arterial blood gases in infants (ages 0.2 to 23.8 months) anaesthetised with either a Jackson-Rees (n = 11) or paediatric circle absorber system (n = 15). Two hours after induction, with assisted ventilation there was no difference in PEtCO2, PtcCO2, respiratory rate, pH or PaCO2 in infants anaesthetised with either system. In the laboratory, we measured inspiratory and expiratory resistances to breathing through each system at various tidal volumes and total gas flows into the circuit. These values were compared to resistances created by breathing through an appropriately sized endotracheal tube. Although there was lower resistance to ventilation through Jackson-Rees system, both systems had lower resistances for almost all flows tested than breathing through an endotracheal tube alone (p < 0.05). The paediatric circle absorber system is an efficient apparatus for anaesthetising spontaneously breathing infants.

Original languageEnglish (US)
Pages (from-to)25-30
Number of pages6
JournalCanadian Journal of Anaesthesia
Issue number1
StatePublished - Jan 1988


  • Jackson-Rees system
  • anaesthetic techniques
  • breathing systems
  • equipment
  • semi-closed
  • semi-closed circle

ASJC Scopus subject areas

  • Anesthesiology and Pain Medicine


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