Collagen Dural Graft Storage and Shelf Life: Warehouse Rules

Distributors should store collagen dural grafts exactly as the label and Instructions for Use specify, rotate stock by expiry date, record lot numbers at every movement and keep damaged, expired and returned units separated. Those four rules protect sterility, keep hospitals supplied with adequate shelf life and make any recall fast and complete.

Collagen dural grafts are sterile, single-use implants made from a biological material. They are small and light, which makes them easy to ship and store, but they still demand discipline in the warehouse. A torn pouch, a missed expiry date or an unrecorded lot can turn a routine delivery into a problem for the hospital and for the distributor's reputation. This article sets out practical warehouse rules for distributors handling DESU's DURASHEET and DECOLL.

What does the label tell you about storage?

The label and the IFU are the only valid sources for storage conditions and shelf life. They state the conditions under which the product must be kept, the expiry date and the lot number, usually with the standard symbols defined in ISO 15223-1. Do not assume that a collagen graft has the same storage requirements as another product, even another collagen product.

Train warehouse staff to read these symbols: expiry date, lot number, storage limits, "do not reuse", "do not use if package is damaged" and the sterilization method. Post a reference chart where goods are received and picked. DESU's specialists can confirm the storage conditions for DURASHEET and DECOLL and provide label samples for training.

What should happen when goods arrive?

Receiving is the first control point. A short, consistent inspection avoids most later problems.

• Check the shipment against the order and the delivery documents: product, size, quantity and lot.
• Inspect outer cartons for damage, moisture or signs of crushing.
• Inspect a sample of unit packages, or all of them if there is any sign of damage, for intact seals and pouches.
• Record lot numbers and expiry dates in the inventory system before the stock becomes available.
• Check remaining shelf life against your agreements with hospitals.
• Place any doubtful stock in quarantine and inform DESU.

Do not open sterile packaging for inspection. Inspection is visual and external; any unit whose sterile barrier is in doubt must not be supplied.

Transport to hospitals

The same care applies when goods leave the warehouse. Use packaging that protects unit pouches from crushing and moisture, keep shipments within the label's storage conditions during transit, and avoid leaving parcels in vehicles or loading areas for long periods. Courier and same-day delivery arrangements for urgent orders should follow the same rules as routine shipments; urgency is not a reason to relax them. When a hospital receives goods, its own receiving check should find packaging as intact as when it left the warehouse.

How should stock be rotated?

Rotate by expiry date, not by arrival date. This principle, often called first expired, first out (FEFO), ensures that the units with the shortest remaining shelf life are shipped first. It matters because shipments do not always arrive in expiry order.

Shelf life at delivery

Many hospitals expect a minimum remaining shelf life when they receive implants, especially if they hold stock for some time. Agree this with each account and with DESU, so that orders can be planned accordingly. Shelf-life questions should be answered from the label and DESU's information, not estimated.

Slow-moving sizes

Collagen dural grafts come in four sizes per product, and some sizes move more slowly than others. Watch slow movers closely, and discuss with DESU how to adjust order quantities so that slow sizes do not approach expiry in the warehouse.

What does the warehouse layout need?

A simple layout supports good practice. Key zones:

Organize saleable stock so that the product, size and expiry date are visible without handling the unit packages repeatedly. Every unnecessary handling step is a chance to damage a pouch. Shelf labels that show product and size, and bins arranged with the earliest expiry at the front, make picking quicker and safer.

Store packages in their outer cartons where possible, away from direct sunlight, moisture and heavy loads, and within the conditions on the label. Do not stack heavy goods on top of graft cartons.

How do you keep lot traceability?

Every movement of a dural graft should carry its lot number: receipt, transfer, shipment to a hospital, consignment placement and return. If DESU ever needs to identify where a lot has gone, the distributor must be able to answer quickly and completely.

Systems and scanning

Where possible, record lots by scanning the barcode on the label rather than typing it, which reduces transcription errors. The inventory system should be able to answer two questions instantly: where is every unit of a given lot, and which lots does a given hospital hold? If it cannot, the gap will show up at the worst moment, during a field action.

Hospitals record the lot at the point of implantation, which closes the chain from manufacturer to patient. The distributor's records sit in the middle of that chain. Our article on dural graft traceability explains the hospital side.

What about consignment stock?

Consignment stock in hospitals remains the distributor's responsibility until used. That means the same rules apply on the hospital shelf as in the warehouse: storage per label, rotation by expiry and regular counts. Agree with the hospital who checks expiry dates, how often, and what happens to units nearing expiry. Units moved between hospitals must keep their lot records and must not be exposed to conditions outside the label limits during transfer.

How should returns and recalls be handled?

Returned units are a common source of risk. A pouch may have been handled, stored in an unknown place or exposed to conditions outside the label. Hold all returns separately, assess them under a written procedure, and do not return any unit to saleable stock unless the procedure allows it and its condition and history are known.

For recalls or field safety notices, readiness is everything:

• Keep a current list of every account and consignment location holding each lot.
• Name a person responsible for responding to DESU notices.
• Practice a mock recall periodically to test that records are complete.
• Keep copies of all communication with hospitals during an action.

After any field action, review what worked and what did not. Were all units located? How long did it take to reach each hospital? Were records complete? The answers improve the procedure for next time and show DESU and your hospital customers that the distributor takes its part of the chain seriously.

Many distributors run their own quality systems, and some certify them to ISO 13485, which applies to organizations across the medical device supply chain. Even without certification, written procedures for these steps are essential.

Talk to a DESU product specialist

If you are setting up storage and logistics for collagen dural grafts, DESU's product specialists can confirm the label conditions and shelf-life information for DURASHEET and DECOLL, supply label samples for training and discuss supply for your market. Write to sales@desu.tr, use the contact page, or request a quote.