Cryogenic Straws, Canes, Goblets and Sleeves: Six Consumable Decisions That Come Before Tank Furniture

Consumables get treated as a stock line. Order when they run low, reorder when they run out. That holds until a straw format is chosen that does not fit goblets and canes already in the store. Nothing is faulty, nothing is under warranty, and the tank furniture gets bought twice.

Here is the order the decisions actually need to happen in.

1. Straw or vial format, first and before anything else

Straw format determines which goblets are compatible, goblets determine cane and canister layout, and that determines rack configuration and the neck diameter the vessel needs. The vessel is last in the chain and first through procurement, which is where most compatibility failures begin.

2. The sealer, matched to the straw

High security straws seal at both ends and keep the sample isolated from the liquid nitrogen. CBS High Security sperm straws are supplied in 0.3 ml and 0.5 ml and seal with the SYMS or SYMS III sealer. Embryo straws are 0.15 ml and 0.3 ml. Plan one sealer per freezing station plus spares, because a single shared unit is a bottleneck on a busy day and a single point of failure on a bad one.

3. Goblets or visotubes, read against your format

CBS Daisy Goblets are listed at up to 540 0.25 ml straws, 240 0.5 ml straws or 168 high security straws. Quoting the largest of those is how a storage figure gets made to look better than it will be in practice. CBS Round Visotubes are rigid PETG tubes from 7.1 mm to 17.5 mm, compatible with 0.25 ml straws, 0.5 ml straws and CBS High Security straws, and they are not interchangeable with goblets.

4. Canes and sleeves

Aluminium cryocanes are the standard organising unit within a canister, because aluminium tolerates repeated cycling to cryogenic temperature without embrittlement, resists corrosion and stays light enough to lift one handed from a full canister. Full size cryocanes take five or six ampoules, half canes take three, and the two look similar in a catalogue. Cryosleeves are PVC covers supplied in packs of 100 that protect samples in handling and carry colour. In a store of thousands of canes, colour coding is the difference between retrieval and searching.

5. Whether you are running two systems

Cryovials are the format where sample volume makes a straw impractical, which covers most cell and tissue banking work. They interact with racks and boxes rather than canes and goblets. Running straws and vials together means running two organisation systems in parallel, and the one nobody documented is where samples go missing.

6. Identification, specified last and mattering longest

Since the Health and Care Act 2022 took effect on 1 July 2022, the Human Fertilisation and Embryology Authority confirms patients may store for up to 55 years with reconsent every ten years. Labelling therefore has to outlast the staff who applied it, at least one change of laboratory information system and possibly a relocation of the store. Labels and printers must be rated for cryogenic exposure, because ordinary label stock lifts and ordinary ink fades.

Settle the chain in order: straw or vial format, then sealer, then goblets or visotubes, then canes and sleeves, then the canister and rack system, and only then the vessel.

Full article: Cryogenic Straws, Canes, Goblets and Sleeves