Chart Special Instructions Indicate 24-hour urine volume on the request form and urine container, if applicable. Screw the lid on securely. Container must be labeled with patient's name and date and time collection started and finished. Although evaluation for proteinuria may be the best single test to work up chronic renal disease, proteinuria may wax and wane.
Toxemia is a state in which urine protein excretion is commonly measured.
The standard for most methodologies is albumin. The different methods are more or less sensitive to globulin than to albumin, so far nonselective proteinurias, where a variety of proteins are present, the different methodologies will give different results. Twenty-four hour urine collections are subject to collection errors. The laboratory method, depending on an aliquot and varying dilutions, is subject to calculation errors, which must be carefully guarded against. Functional and postural proteinuria occur.