Cold Chain to a Home Address

Part of Decentralized Trials (DCT) Training: Direct-to-Participant Shipping.

About 2 minutes. Free, in your language, no account needed.

A home is not a controlled environment

Domestic refrigerators run warm, run cold, and get opened constantly. A door shelf is the warmest place in the appliance and the most likely place a participant will put a box.

If the product needs controlled storage, the instruction has to be specific.

Be specific about where, not just cold

"On a middle shelf, not the door, not the freezer compartment" is an instruction somebody can follow. "Refrigerate" is not.

The freezer point matters. Participants freeze things they are told to keep cold, and freezing destroys many biologics irreversibly.

Give them a way to know if something went wrong

A power cut, a holiday, a fridge failure. If the study provides a monitor, make sure they know how to read it and who to tell.

If it does not, tell them what to report: a fridge that was off, a product left out, packaging that arrived warm or damaged.

Delivery timing is part of the chain

A cold chain shipment arriving on a Friday to a house where nobody is home is a product sitting on a step.

Confirm somebody will be there, and avoid shipping into a weekend or a holiday for the same reason you would avoid it to a laboratory.

Treat a reported excursion like any other

Quarantine, in the sense that the participant stops using it. Collect the facts: how long, how warm if known, which units. Escalate to the sponsor for the decision.

Do not tell a participant it is probably fine. That is not your call and it is the call most often made wrongly.

Replace quickly

A participant without usable product is missing doses from that moment. Speed matters more than tidiness in the paperwork, which can follow.

Record all of it

The instruction given, the excursion reported, the assessment, the replacement, and the disposition of the affected units.