What we have written on the cold chain137 / 154

A thermobox is an insulated transport container that minimises heat exchange; pre-frozen eutectic plates supply the cold. Types and sizes from the 46-litre EPP box to the 1500-litre TBX.

Personal medicine goes in the cabin with a prescription and its original pack, held at +2 to +8 °C door to door. A commercial consignment follows a separate route with a qualified container and airline cargo acceptance.

Match warehouse release and vehicle loading in one lot record, and measure dock waiting separately.

Choose fixed monitoring points from the map and product risk. Record point ID, time, device and excursion action together.

The hospital's written procedure names who takes blood to the ward, and the Turkish Society of Hematology guideline requires authorised staff. Authority means knowing the transport conditions.

Before linking weight change to humidity, weigh the same batch and log temperature and relative humidity. A simple record helps locate where loss occurs.

Red cells travel at +2 to +6 °C, platelets at 20-24 °C and fresh frozen plasma frozen. The temperature follows the component in the carrier.

Do not attribute a bill change directly to a seal. Check contact, then compare meter data under similar conditions.

Match door-open times with product temperatures and outside conditions; do not assign a cause before measuring.

Icing is a trace of moisture from outside, not a fault. Once you work out how much water each kilogram of incoming air carries, the amount and the place of the ice can be measured.

Cold-chain evidence in food operations joins a representative point, device identity, raw records and authorised review.

The figures measured at each stage of making an EPS box, from the roughly 40-fold expansion of the bead to moulding, and the difference in compressive strength and insulation between three density grades.