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High Frequency Ventilation and Gas Diffusion
Author(s) -
Chakrabarti M. K.,
Loh L.,
Gilchrist I.
Publication year - 1984
Publication title -
acta anaesthesiologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.738
H-Index - 107
eISSN - 1399-6576
pISSN - 0001-5172
DOI - 10.1111/j.1399-6576.1984.tb02116.x
Subject(s) - medicine , high frequency ventilation , ventilation (architecture) , diffusion , anesthesia , mechanical ventilation , meteorology , thermodynamics , physics
The efficiency of CO 2 removal was studied using a simple lung model with a high frequency positive pressure device (up to 100 b.p.m.) with and without an anatomical deadspace. At a constant minute ventilation without an anatomical dead space, the efficiency of CO 2 elimination increased with increasing frequency. However, when a dead space was introduced, the efficiency of CO 2 elimination decreased with increasing frequency. Using a high frequency oscillation technique (360 to 900 b.p.m.), it was not possible to maintain a reasonable CO 2 elimination with tidal volumes less than the anatomical dead space. In this model there was no evidence that accelerated diffusion was a factor in CO 2 removal during high frequency ventilation or oscillation.