What constitutes a valid specimen for toxicology testing?

What constitutes a valid specimen for toxicology testing?

• A. A specimen with a broken seal but labeled.
• B. Any container with a donor name.
• C. Adequate volume, proper labeling, intact tamper-evident seal, correct donor information, proper temperature maintenance, and complete chain-of-custody documentation.
• D. A dry specimen without temperature control.

Answer: (C)

Specimen validity in toxicology hinges on preserving sample integrity from collection to analysis. A valid specimen must have enough volume to perform the required tests, be properly labeled to match the donor and the test order, be protected by an intact tamper-evident seal, carry correct donor information, be kept at the proper temperature to preserve the analytes, and have complete chain-of-custody documentation detailing every handling step. If any of these elements are missing or damaged, the specimen is not reliable for testing.

For example, a broken seal compromises integrity because tampering could have occurred, even if the label is correct. A container with only a donor name lacks essential aspects like seal integrity, temperature control, and custodial documentation. A dry specimen without temperature control risks improper preservation of substances. By ensuring all these factors are in place, the specimen remains trustworthy and defensible for toxicology analysis.