Body Fluids
Some parameters of urine “macroscopic” examination are quantity, color, clarity and cloudiness. Some of the constituents that might be observed in a urine “microscopic” examination are epithelial cells, crystals, bacteria or yeast and protozoan casts. Three conditions that can occur prior to a specimen being poured into a centrifuge tube that can produce false-negative microscopic results are the use of an old, unpreserved specimen, failure to mix the specimen and an amorphous precipitation. For the overall evaluation of the sediment and the detection and quantity of casts, the magnification that should be used is 100x. On the other hand ...
