Probenlogistik

Probenlogistik is the part of Präanalytik that happens after the tube is filled, which means how the sample is stored, how it is packed, how it is transported and how long all of that takes.

What decides whether a draw counts is stability. Each analysis has a window within which the sample has to reach the bench, and some of those windows are short. Miss one and the value is either not reportable at all or reportable with a caveat that makes it useless for the conversation the customer came for.

The requirements come from the akkreditiertes Labor that will run the analyses, and its Präanalytik handbook sets out each of them:

• The handbook names which tube is used for each analysis.
• It states the volume the laboratory needs in that tube.
• It says whether the sample is centrifuged before dispatch.
• It gives the temperature at which the sample is transported.
• It names the latest handover time for each courier run.

For a pharmacy the practical consequence is that appointment times and courier times are one decision rather than two. Booking a panel with a short stability window into the late afternoon of a day with a morning-only pickup means the sample waits overnight, and overnight is usually too long.

The controls are simple to write and easy to skip:

• A named collection window belongs on the plan for every weekday.
• Samples wait in one defined place, at the right temperature.
• Packaging matches the transport rules for diagnostic samples.
• A log of what left when answers a laboratory query three days later.

All of this belongs in the pharmacy's Standardarbeitsanweisungen rather than in someone's memory, because the person who took the venöse Blutentnahme is often not the person who hands the box to the courier.