Korean J Anesthesiol.  1991 Jun;24(3):490-495. 10.4097/kjae.1991.24.3.490.

Comparison of Arterial Carbon Dioxide Tension and End-tidal Carbon Dioxide Tension in Infants and Children

• Lee TI
• Shin CM
• Park JY

• KMID: 2239274
• DOI: http://doi.org/10.4097/kjae.1991.24.3.490

Abstract

End-tidal PCO2 measurements are less accurate in neonates, infants, and small children than in adults. These in accuracies may by attributed in part to the dilution of end-tidal gas with fresh gas as a result of placing the sampling catheter between the endotracheal tube and a partial rebreathing circuit. To determine the most accurate catheter position for measurements of end-tidal gas tensions, end-tidal PCO2 was measured continuously from the distal and proximal end of the endotracheal tube and these data were compared with simultaneous arterial PCO2 The results were as follows: 1) In children weigthing above 15 kg ventilated with partial rebreathing circuit, both distal and proximal end-tidal PCO2 values approximated arterial PCO2 (p<0.05). 2) In infants and children weigthing below 15 kg ventilated with Ayre's T-piece breathing circuit(Jackson-Rees modification), only distal end-tidal PCO2 approximated arterial PCO2.

Keyword

End-tidal carbon dioxide tension; Arterial carbon dioxide tension

MeSH Terms

Adult
Carbon Dioxide*
Carbon*
Catheters
Child*
Humans
Infant*
Infant, Newborn
Respiration
Carbon
Carbon Dioxide