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Rebreathing during spontaneous and controlled ventilation with T‐piece breathing systems: a general solution
Author(s) -
DORRINGTON K. L.,
LEHANE J.R.
Publication year - 1989
Publication title -
anaesthesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.839
H-Index - 117
eISSN - 1365-2044
pISSN - 0003-2409
DOI - 10.1111/j.1365-2044.1989.tb11281.x
Subject(s) - waveform , medicine , ventilation (architecture) , controlled ventilation , dead space , tidal volume , respiratory minute volume , volume (thermodynamics) , breathing , control theory (sociology) , anesthesia , calculus (dental) , mechanical ventilation , computer science , respiratory system , thermodynamics , artificial intelligence , physics , telecommunications , radar , control (management) , dentistry
Summary A general solution is presented to the problem of finding the degree of rebreathing generated by T‐piece breathing systems. The solution is applicable to any ventilatory waveform, dead space volume and tidal volume and is identical for spontaneous and controlled ventilation for any given ventilatory waveform. The method is graphical and its use and understanding require no mathematical skills. However, if an analytical form of the ventilatory waveform is known, the method is easily extended by use of calculus to obtain a precise analytical solution.