When should refrigeration be used for specimen transport, and why is timing important?

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Maintaining specimen integrity hinges on temperature control and timing because different tests have specific stability windows. Refrigeration during transport slows down enzymatic activity, chemical changes, and microbial growth that can alter a specimen’s components. If processing is delayed beyond the recommended window without cooling, those changes can lead to inaccurate results or unusable samples.

So, refrigeration is used only when the test protocol requires it, and the specimen should be processed within the specified timeframe. Following these guidelines helps ensure the results reflect the patient’s condition at collection. Some tests are stable at room temperature, but many require cooling or prompt processing, so delays without cooling or unnecessary refrigeration can both compromise accuracy.