How long can urine be stored for a dog's urinalysis? - briefly
The duration of urine storage for a dog's urinalysis is crucial for accurate results. Ideally, urine should be analyzed within one hour of collection. If immediate analysis is not possible, the sample can be stored in a refrigerator at 4°C (39-41°F) for up to 24 hours, but it is essential to keep the container closed and away from light.
How long can urine be stored for a dog's urinalysis? - in detail
The duration for which canine urine can be stored before analysis is crucial for obtaining accurate results in a dog's urinalysis. Proper storage and handling of urine samples are essential to prevent degradation of analytes, thereby maintaining sample integrity.
Urine collection should ideally be performed using a clean, sterile container to minimize contamination. Once collected, the urine sample should be stored at 4°C (39°F) if immediate analysis is not possible. Refrigeration helps slow down the metabolic processes and bacterial growth that can alter the composition of the urine.
The ideal storage time for a dog's urine sample varies depending on the specific tests to be performed:
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Bacteriological Culture: For bacterial analysis, it is recommended that the urine sample be stored at 4°C and analyzed within 24 hours of collection. Prolonged storage can lead to the growth or loss of bacteria, which may affect the accuracy of the culture results.
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Chemical Analysis: Most chemical components in urine remain stable for up to 72 hours when stored at 4°C. This includes tests for glucose, protein, ketones, bilirubin, and specific gravity. However, it is advisable to perform these analyses as soon as possible after collection to ensure the most accurate results.
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Microscopic Analysis: Urine samples intended for microscopic examination should be analyzed within 24 hours of collection. Storage beyond this period can result in cellular breakdown and degradation, which may affect the interpretation of sediment findings.
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pH Measurement: The pH of urine is relatively stable and can be measured accurately up to 72 hours after collection when stored at 4°C. However, prolonged storage may lead to slight changes in pH due to the continued metabolic activity of cells within the sample.
In summary, while refrigerated storage can extend the usable life of a urine sample, it is always best practice to perform urinalysis as soon as possible after collection to ensure the most accurate and reliable results. Proper handling and prompt analysis are critical for diagnosing and treating any underlying conditions in dogs.