Domiciliary oxygen concentrators in anaesthesia: preoxygenation techniques and inspired oxygen concentrations.
A conventional preoxygenation technique was compared in two volunteers with two techniques based on a drawover breathing system supplied with oxygen enriched air from a Devilbiss Mini VO2 domiciliary oxygen concentrator. Breathing from a 20-litre bag, filled previously at 2 litre min-1 from the concentrator was as effective as the conventional technique (PaO2 73.2 kPa). Supplying 4 litre min-1 to a drawover system was less effective (PaO2 35.5 kPa). We present a simple method for determining the inspired oxygen concentration obtained under conditions of drawover anaesthesia using an oxygen concentrator.
Wilson
I H
IH
Department of Anaesthesia, Royal Devon and Exeter Hospital.
van Heerden
P V
PV
Leigh
J
J
D000768:Anesthesia, General; D002245:Carbon Dioxide / Q000097:blood; D006801:Humans; D008176:Lung Volume Measurements; D008722:Methods; D010100:Oxygen / Q000008:administration & dosage* / Q000097:blood; D010106:Oxygenators
D002245:Carbon Dioxide; D010100:Oxygen