Two failures show up after a specimen transport audit more often than any others: the log cannot reconstruct what actually left the building, and the packaging cannot be shown to be a compliant Category B system. Rebuilding both is mostly a documentation exercise. What follows is a typical pattern drawn from an anonymised composite of clinic and lab walkthroughs, not one named facility's story.
None of it depends on a site being careless: these are the gaps that appear when nobody has asked for the paperwork, and each maps to a published requirement.
What Does a Specimen Transport Audit Actually Look At?
Auditors and receiving labs work backwards from the consignment: what was in it, how it was classified, how it was packed, who offered it for transport, and what the paperwork says about each. In Canada, Category B infectious substances sit inside the Transportation of Dangerous Goods framework, so the duties attach to the offeror — the clinic or lab that hands the box over — rather than only to the driver. Classification, marking, documentation and training all follow that role.
What Does UN3373 Category B Packaging Require?
Category B specimens move under the UN3373 marking, and IATA PI 650 expects three functional layers: a leak-proof primary receptacle, a leak-proof secondary package around it, and a rigid outer package with cushioning, at least 100 mm by 100 mm. Absorbent material able to take the entire primary volume goes between primary and secondary. The completed package is expected to withstand a 95 kPa pressure differential and a 1.2 m drop, and the outer package carries the UN3373 marking, the proper shipping name and an itemised list of contents.
Which Gaps Come Up Most Often?
In walkthroughs, the same handful recurs: absorbent that covers a small tube but not a full container; a data sheet on file without the pressure and drop validation for the bag actually in use; ice packs added without re-checking whether the absorbent can take the condensate; a handover with a signature but no time; training records that name a course rather than a person and a date; and contents lists that read "specimens" instead of itemising what was sent.
| Requirement | What an audit looks at | Common gap |
|---|---|---|
| Classification and marking | UN3373 and the proper shipping name on the outer package | Marking that rubs off or bleeds in transit |
| Three-layer packaging | Primary, secondary, rigid outer with cushioning | Tubes in one zip bag inside a padded envelope |
| Absorbent capacity | Absorbent sized for the full primary volume | One small pad under a large container |
| Pressure and drop performance | 95 kPa differential and 1.2 m drop evidence | Data sheet kept, validation certificate not |
| Itemised contents list | A list of contents inside the outer package | "Specimens" with no count or identifiers |
| Training and documentation | TDG training tied to a named person and a date | A certificate for the clinic rather than the staff member |
| Handover record | Date, time, courier and package condition | Signature only, with no time recorded |
How Do You Rebuild the Log Without Starting From Scratch?
Work backwards from the receiving end. Ask the lab for the questions it raises when a consignment arrives, then build the log fields from those questions: date and time of collection, specimen type and identifiers, packaging used, who packed it, the temperature control, the courier, the handover time and the receipt confirmation. Backfill two weeks from courier receipts and lab acknowledgements, so the log shows a practice rather than a blank template.
Who Is Responsible When a Courier Asks for Documents?
The offeror signs the declaration and selects the packaging, so classification, marking, documentation and training belong to the clinic or lab, not the courier. Name one person as responsible for transport compliance, with a deputy, and keep both training records current.
Can Better Packaging Fix a Temperature Excursion?
Partly. Packaging holds a temperature band; it does not create one. Insulated secondary packaging, conditioned gel packs and an absorbent layer able to take condensate all matter, but the configuration has to match what the receiving lab requires. Fix the temperature documentation alongside it: an excursion that was never recorded looks like an excursion nobody noticed.
Rebuilt logs need consumables behind them. The UN3373 specimen transport bags, 6×9 inch, 95 kPa (100-pack) include a document pouch and an absorbent pad, and the compliance log centre holds the log templates. Volume pricing for multi-site groups sits at the bulk quote desk.
Clinics that also monitor sterilizers can start with a BI 5-pack trial ($12.99, ships free).
Related reading
For the packaging detail, read UN3373 Category B packaging explained: IATA PI 650 and 95 kPa, then specimen cold chain in Canada: excursions, gel packs and documentation and does TDG apply to specimen collection in Canada?
Frequently Asked Questions
Does UN3373 packaging need a 95 kPa rating?
For liquids offered as Category B, the completed package has to withstand a 95 kPa pressure differential. That is normally shown by using rated packaging and keeping the validation evidence on file.
Do we need TDG training to send specimens to a lab?
The offeror of the dangerous goods carries the training, classification, marking and documentation duties under the TDG framework, so the staff who pack and hand over the consignment need current, documented training.
What is the most common packaging gap found in an audit?
Absorbent that covers a small tube but not the full primary volume, and packaging in use without the pressure and drop validation for that exact product.
Can the contents list just say specimens?
No. The outer package should carry an itemised list of contents, so the receiving lab has something to reconcile against when a consignment is delayed or questioned.
CliniEco Medical is a licensed medical device establishment (MDEL #35334).
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