RT Journal A1 FERRARO LR, FRIEDMAN MM, MORELLI HE T1 EXtracellular fluid in cardiac edema and ascites JF Archives of Internal Medicine JO Archives of Internal Medicine YR 1949 FD March 1 VO 83 IS 3 SP 292 OP 297 DO 10.1001/archinte.1949.00220320046003 UL http://dx.doi.org/10.1001/archinte.1949.00220320046003 AB THE IMPORTANCE of determining quantitatively the amount of extracellular fluid deposited as edema or ascites in pathologic states is well appreciated. Previous laboratory methods for this determination were open to criticisms and objections. Experimental work showed that the chloride ion is confined principally to the extracellular area.1 In 1939, Wallace and Brodie2 compared the tissue Br to tissue Cl and conr serum Br serum Cl cluded that the ratio of distribution of these ions is similar in all tissues of the body with the exception of the brain. Later, Brodie, Brand and Leshin3 proposed a quantitative test for extracellular fluid by injection of sodium bromide intravenously and determination of its level in the serum and urine. Bromide was selected for this purpose since it is nontoxic in the doses administered, rapidly distributed throughout the body, slowly excreted and capable of accurate analysis. It is also dispersed