Performing a urinalysis This video outlines how to perform the first steps of a urinalysis. These steps include gross examination of the urine (volume, color, clarity), measuring urine specific gravity, dipstick analysis, centrifugation to create a urine sediment, and placing the sediment on a slide for microscopic examination. It does not cover the latter. […]
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Crystalluria in a Dog Case information A 1-year-old intact male English Mastiff was presented to Emergency Medicine at the Cornell University Hospital with a one week history of pollakiuria and stranguria. Four days prior to presentation, the dog had been started on oral prazocin (an α-1 adrenergic blocker) with no improvement. Hematuria, coughing, sneezing, or
Below is a compilation table of the cellular constituents that can be seen in urine. Note, that the magnification is not equal for these images. Cellular constituents in urine Cell Identification Interpretation RBC Fig 1: RBC and amorphous crystalsFig 2: Fat droplets Round, slightly red-tinged, smooth textured cells, which may be biconcave in fresh urine.
This page provides a table compilation of common and uncommon crystals. See also the urinalysis atlas. Common crystals Common urine crystals Crystal pH Details Ammonium biurate Usually acidic to neutral, rarely alkaline: pH ≤ 7 (in humans, usually in alkaline urine) Variably sized, mostly small to medium, brown, spherical to irregular crystals (“thorny” apple). Common
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Samples for urinalysis should be collected in a sterile manner and be of adequate volume. Collection method Time of day The time of day at which urine is collected can be important in some regards: AM (or fasting) samples tend to have: higher USG (decreased or no water intake) lower pH more formed elements (if
The routine urinalysis is a quick and relatively inexpensive test which can be readily performed in most practices. The results are useful in a variety of situations and are not limited to those directly involving the urinary tract. Routine urinalysis is an essential part of the diagnostic evaluation of sick patients and the results should
Composition Casts are cylindrical structures composed mainly of mucoprotein (the Tamm-Horsfall mucoprotein) which is secreted by epithelial cells lining the loops of Henle, the distal tubules and the collecting ducts. The factors responsible for the precipitation of this mucoprotein are not fully understood, but may relate to the concentration and pH of urine in these
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