![]() ![]() Note: Urine provides a welcome place for bacteria to grow bacterial contamination from the surrounding environment is a common error when a sample is not handled properly or when it is left on the counter for hours before being analyzed. Finally, the sample is centrifuged and the sediment is analyzed under the microscope to detect the presence of cells, casts, crystals, microorganisms, and tumor cells. In the lab, the urine is observed for abnormalities of color or odor specific gravity is determined by placing a drop of urine on a hand-held instrument called a refracto-meter and various chemicals in the urine are analyzed by dipping a chemically-impregnated dip stick into the urine and observing color changes. Depending on what condition is suspected, there may also be a best time of day for collection check with your vet. Samples can be collected via catheter, cystocentesis (removal of urine by using a sterile needle to tap through the abdominal cavity into the bladder), or by catching a mid-stream flow in a clean container – easer said than done, especially with small dogs and females who squat low to the ground.Įach of these collection methods has its advantages and disadvantages, and often, unless you are quick with the catch-jar and quick afoot to deliver it to the vet clinic, it may be easiest to have the technicians collect it at the clinic and read it in-house. ![]() Urine Analysisįresh samples give the best results samples should be analyzed within two hours, or up to six hours after collection if they have been refrigerated. In addition, the urinalysis evaluates substances in the urine that might indicate ongoing disease. Analysis of the sediment of the urine reflects the health of all these structures and the cells that line them.Ī complete urinalysis will test the function of the nephrons provide some indications of the current metabolic status of the animal and demonstrate the relative fluid status of the body. From the kidney the filtrate passes through the ureters into the storage organ, the bladder, where it remains until voided via the urethra and external genitalia. The functional unit of the kidney is the nephron, which is comprised of the glomerulus (with its attendant vascular bed that serves as a filtration unit) and the tubule, which modifies the filtrate. In addition, the kidneys help maintain fluid balance in the body by concentrating (or diluting) the kidneys’ filtrate. Urine is the end product of a process of filtration that removes waste products and metabolic end products from the blood serum.
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