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Acta Anaesthesiol Scand · Feb 1994
Measurement of dead-space in a model lung using an oscillating inspired argon signal.
- E M Williams, D J Gavaghan, P A Oakley, M C Sainsbury, L Xiong, A M Black, and C E Hahn.
- Nuffield Department of Anaesthetics, University of Oxford, UK.
- Acta Anaesthesiol Scand. 1994 Feb 1;38(2):126-9.
AbstractIn a model lung, airways dead-space can be accurately measured using a forced inspired oscillating argon signal, which varies sinusoidally about a mean concentration of 6% v/v with an amplitude of +/- 4% v/v. With sinusoid forcing periods longer than 120 seconds, and at a breathing rate of 13.4 breaths minute-1, the mean airways dead-space can be measured with a standard error of less than 5%. Sinusoid forcing periods shorter than 120 s provided inaccurate estimates of dead-space and so should not be used with this technique.
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