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Korean J Anesthesiol > Volume 24(3); 1991 > Article
Korean Journal of Anesthesiology 1991;24(3):490-495.
DOI: https://doi.org/10.4097/kjae.1991.24.3.490   
Comparison of Arterial Carbon Dioxide Tension and End-tidal Carbon Dioxide Tension in Infants and Children .
Tae In Lee, Chee Mahn Shin, Ju Yuel Park
Department of Anesthesiology, College of Medicine, Inje University, Pusan, Korea.
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.
Key Words: End-tidal carbon dioxide tension; Arterial carbon dioxide tension


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