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Canadian Journal of Anesthesia, Vol 25, 276-281, Copyright © 1978 by Canadian Anesthesiologists' Society

The Use of the Bain Circuit in Spontaneously Breathing Paediatric Patients

M. G. SOLIMAN M.D., F.R.C.P.(C)1 and R. LABERGE M.D., FMR.C.P.(C)1

1 University of Montreal, Que., Canada

We studied the use of Bain circuit in children under general anaesthesia, intubated without the use of muscle relaxants and breathing spontaneously. The fresh gas flow was equal to the calculated minute volume with a mean of 206 ml/kg/min.

No clinical signs of hypercapnia were observed. Arterial blood gas analyses showed that Pacoco2 was normal or below normal. There was no significant difference between arterial Pcoco2 immediately after induction and after 45 minutes of spontaneous breathing.

We explain the hypocapnia observed in some patients as a compensatory respiratory alkalosis, in response to the metabolic acidosis caused by fasting.

Thus we can assume that the Bain system is safe for use in normal children during general anaesthesia with spontaneous breathing.






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Copyright © 1978 by the Canadian Anesthesiologists' Society.