Instrument trays for sterilization: perforated baskets and mesh trays

What a sterilization basket or mesh tray must do

A sterilization tray for instruments has to solve four problems at once. It must allow washing fluid to reach all surfaces and drain away afterwards. It must allow steam or other sterilant to circulate and condensate to leave. It must hold instruments so they do not shift or damage each other. And it must be compatible with the container, sterilizer and washer racks in your department.

Perforations or open wire mesh deal with the first two. Compartments, holders and mats handle the third. Dimensions and rims handle the last. Weak points are usually the combination: a basket that washes well but holds instruments loosely, or one that fits the container but traps water in its corners.

Materials and construction

Baskets are normally made of stainless steel wire or perforated sheet with smooth, deburred edges, and handles that can be lifted with gloved hands. Look at weld quality and edge finish, because rough welds trap soil and can catch on soft goods or insulation. A basket should keep its shape when fully loaded and not warp after repeated cycles.

REDA's container system lists wire baskets and endoscope storage baskets in its range, alongside silicone holders, full, three-quarter and half-size containers, and perforated or solid bottoms (REDA sterilization container system). Sizes of those formats are summarised in instrument tray sizes.

Silicone mats, holders and instrument tray liners

Silicone mats and holders keep instruments in position, prevent metal-to-metal contact and protect tips and cutting edges. They are particularly valuable for micro and ophthalmic sets, scissors and instruments with fine jaws. Silicone is heat-resistant and washable, but pads must be designed with openings so that water and steam can pass through and moisture does not pool under items.

Instrument tray liners made of paper or textile are also used, mainly to absorb condensate; if you use them, check that the sterilizer's drying phase and the container IFU allow them. Inspect silicone regularly for tears or residues, and replace worn pieces, because damaged holders become a source of retained soil.

How to load a tray correctly

Overloading is the most frequent cause of wet packs and poor washing. Weight limits and loading patterns in the IFU exist for that reason; see also how to clean surgical instruments for washer loading.

• Open hinged instruments and disassemble multi-part items.
• Place heavy instruments at the bottom or in a separate basket, fine instruments on top.
• Do not stack bowls or hollowware without drainage; place them with the opening down.
• Keep sharp tips protected by holders or mats.
• Respect the manufacturer's weight limit for the basket and container.
• Add the chemical indicator in the area the manufacturer recommends.

Selection checklist and next steps

Match the basket to the container and sterilizer, not to the brochure: confirm footprint, height, handle clearance and compatibility with your washer racks. Ask for the cleaning and sterilization limits of the materials, and for the availability of spare parts, since a common failure is a lost silicone holder.

For the wider choice between rigid containers and wrap, read the sterilization container systems guide. Beckfinity's specialists can help match baskets and containers to your sets; request a consultation.