Why is maintaining proper temperature during specimen transport critical?

• A. Temperature affects analyte stability; improper temperature can cause degradation or concentration changes, leading to erroneous results.
• B. Temperature does not affect most analytes.
• C. Only reagents are affected by temperature, not specimens.
• D. Temperature control is only needed during calibration.

Answer: (A)

Maintaining proper temperature during specimen transport preserves analyte stability and the specimen’s integrity. When a specimen isn’t kept at the recommended temperature, enzymes, chemical reactions, or microbial growth can continue or accelerate, altering the concentration and state of the analytes we measure. This can produce results that don’t reflect the patient’s true condition. For example, glucose can be consumed by cells if blood is not cooled promptly, giving a falsely low reading, while RNA is highly labile and degrades quickly if not kept cold. Keeping specimens within specified temperatures and minimizing transport delays reduces pre-analytical variability and improves accuracy and reliability of results.

The other statements don’t fit because temperature does affect most analytes, not only a few; reagents and specimens can both be affected by temperature, not just reagents; and temperature control is important throughout the pre-analytical phase, not only during calibration.