RT Journal
A1 PURDY CW
T1 QUantitative estimation of albumin in the urine.
JF Journal of the American Medical Association
JO Journal of the American Medical Association
YR 1899
FD September 23
VO XXXIII
IS 13
SP 762
OP 764
DO 10.1001/jama.1899.92450650012001d
UL http://dx.doi.org/10.1001/jama.1899.92450650012001d
AB Our present lack of a uniform method of expressing quantities of albumin in the urine detracts much from the value of all our methods; indeed, it renders the subject very confusing. As commonly employed, the term "percentage of albumin" is applied indifferently to gravimetric and volumetric measurements, as though they were synonymous, when, as a matter of fact, the two possess the most widely different significations. Thus, we commonly hear and read of percentages of albumin in the urine ranging from 20 to 40, etc., without further qualification. Such amounts expressed by actual weight would be a physical impossibility, since the proportion of albumin in the blood-serum itself never exceeds 9 per cent., and it would therefore be clearly impossible for the proteid contents of a fluid derived directly from the blood—such as the urine—to exceed that in the blood itself. As a matter of fact, the albumin in the