Accuracy of end-tidal PCO2 measurements using a sidestream capnometer in infants and children ventilated with the Sechrist infant ventilator

Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie
S C HillierJ Lerman

Abstract

To determine the accuracy of end-tidal PCO2 (PETCO2) measurements analyzed with a sidestream capnometer in infants and children whose lungs were ventilated with a Sechrist infant ventilator and an Ayre's t-piece, we compared PETCO2 measurements obtained from the proximal (PETCO2-p) and distal (PETCO2-d) ends of the tracheal tube to arterial PCO2 (PaCO2) in 37 healthy infants and children between 1.3 and 24.5 kg. Both PETCO2-p and PETCO2-d accurately approximated PaCO2, however, the mean (+/- SD) arterial to end-tidal PCO2 difference (delta(a-ET)PCO2) was significantly greater with proximal (1.27 +/- 1.54 mmHg) than with distal sampling (0.64 +/- 1.64 mmHg) (P less than 0.01). In the subgroup of patients who weighted less than 12 kg, the delta(a-ET)PCO2 using proximal gas sampling (1.94 +/- 1.29 mmHg) was also significantly greater than it was using distal sampling (0.74 +/- 1.31 mmHg) (P less than 0.001). We conclude that although statistically different, both proximal and distal estimates of PETCO2 provide acceptable estimates of PaCO2 in healthy infants and children who are ventilated with a Sechrist infant ventilator and an Ayre's t-piece system.

References

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Citations

Jul 1, 1992·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·K Bhavani-ShankarY Delph
Nov 1, 1993·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·I A Spahr-SchopferE J Hartley
Oct 1, 1994·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·L Halpern, B Bissonnette
Feb 18, 1998·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·J D TobiasM A Helikson
Nov 1, 1988·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·J M BadgwellR E Creighton
Oct 27, 2012·Journal of Clinical Monitoring and Computing·Jorn FierstraJoseph A Fisher
May 3, 2005·Archives of Disease in Childhood. Fetal and Neonatal Edition·D G TingayC J Morley
Jan 1, 1996·Paediatric Anaesthesia·A L Goldsmith, I H Lewis
Apr 10, 2004·Journal of Cardiothoracic and Vascular Anesthesia·Mehmet TugrulKamil Pembeci
Jun 9, 2004·Neonatal Network : NN·Scott DeBoer, Michael Seaver
Nov 20, 2015·Journal of Perinatology : Official Journal of the California Perinatal Association·J M Di FioreP MacFarlane
Aug 23, 2003·Anesthesia and Analgesia·Motoko OshibuchiKoji Sumikawa
Apr 1, 1990·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·B A McEvedyJ Lerman
Jan 1, 1998·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·J D TobiasM A Helikson

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