End-tidal carbon dioxide measurement in infants and children during and after general anaesthesia

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Abstract

We have examined the reliability of end-tidal carbon dioxide (PetCO2) monitoring as an estimate of arterial carbon dioxide tension (PaCO2) in spontaneously breathing infants and children. Forty patients were studied in the post-anaesthetic care unit; 20 < 12 kg and 20 ≥12 kg. The PetCO2 was sampled via a 5 cm 16 gauge catheter taped below an external naris and this measurement was compared with the PaCO2 of a sample drawn from an indwelling arterial line. Twenty additional patients were studied during inhalational anaesthesia. The PetCO2 was measured both from the proximal end of the elbow connector and from a 5 cm cannula inserted through the elbow. An arterial blood gas sample was obtained simultaneously. The arterial to end-tidal (Pa-ET) differences were compared between the two sites. Patients studied in the post-anaesthetic care unit showed good correlation between PetCO2 and PaCO2 regardless of weight: Pa-EtCO2 of -0.6 ±3.6 (< 12 kg) and -1.1 ±2.8 mm Hg (≥12 kg). Patients studied during mask anaesthesia showed better correlation between PetCO2 and PaCO2 when PetCO2 was sampled from thte cannula: Pa-ETCO2 of 3.5 ±4.8 mm Hg (cannula), 8.6 ±4.5 (elbow) (P < 0.05). These results suggest that end-tidal CO2 monitoring is a useful and reliable method for assessing adequacy of ventilation in spontaneously breathing children weighing between 5.2 and 35 kg. © 1994 Canadian Anesthesiologists.

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CITATION STYLE

APA

Campbell, F. A., McLeod, M. E., Bissonnette, B., & Swartz, J. S. (1994). End-tidal carbon dioxide measurement in infants and children during and after general anaesthesia. Canadian Journal of Anaesthesia, 41(2), 107–110. https://doi.org/10.1007/BF03009801

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