Finally I address the issue of PaO2/FiO2 as a way of quantifying oxygenation. The PF ratio, as we call it, is a significant component of the ARDS definition. A PF ratio of 200 in mmHg is equivalent to 25 in kPa and a ratio of 100 in mmHg is equivalent to 12.5 in kPa. An easier...
[16] HENDERSON R P,WEBSTER J G.An impedance camera for spatially specific measurements of the thorax[J].IEEE Transactions on Bio-Medical Engineering,1978,25(3):250-254. [17] FRERICHS I,AMATO M B P,VAN KAAM A H,etal.Chest electrical impedance tomography examination,data analysis,terminology,...
However, a careful evaluation could identify some minimal or marked differences in the diagnostic criteria, definition, gas-exchange abnormalities, and clinical manifestations. In normal lung, gas-exchange is determined by the greater amount of normally aerated and perfused alveoli, with low venous ...