Teams preparing to buy dural graft material usually compare price per unit first and specification second. That order produces poor decisions, because the specification determines how many units a case consumes and what happens to the patient afterwards. This checklist sets out what to verify before a framework agreement is signed, and where Desu Medical’s collagen dural grafts stand on each point.

1. Composition and Purity

Ask for the stated collagen type and purity in writing. Type I collagen is the structural protein of native dura, so a Type I graft presents a familiar biological interface. Desu specifies more than 99.9% pure Type I bovine collagen for both DECOLL and DURASHEET.

Purity determines the residual non-collagenous load, which is the fraction most associated with host reaction. Therefore a purity figure is a clinical specification, not a marketing line.

2. Natural Matrix Versus Manufactured Polymer

Establish whether the product is a purified biological matrix or a manufactured polymer sheet. The distinction governs long-term behaviour. A pure collagen membrane is resorbed and replaced by host connective tissue, so no permanent implant remains. Desu manufactures exclusively natural collagen membranes.

3. Certification and Quality System

Request the CE certificate, the declaration of conformity and evidence of the manufacturer’s quality management system. Desu operates under ISO 13485 and supplies the dural graft range with CE certification. Biocompatibility testing to the ISO 10993 series covers cytotoxicity, sensitisation, systemic toxicity and implantation response.

4. Size Range and Waste Profile

A narrow size range forces waste. Before you buy dural graft material, map your case mix against the available formats. DECOLL is supplied as DCL2525 (2.5 x 2.5 cm), DCL5050 (5 x 5 cm), DCL7575 (7.5 x 7.5 cm) and DCL100100 (10 x 10 cm), which covers focal repair through to expansive duraplasty.

5. Preparation Time

Products requiring rehydration or chemical activation add minutes to every case and introduce variability in emergencies. Desu membranes are supplied ready to use and gamma sterilised, so the package is opened and the membrane is placed.

6. Packaging and Traceability

Individual sterile packaging with lot number and expiry marking supports stock rotation, single-case opening and vigilance reporting. Confirm that the supplier can provide lot documentation on request.

7. Technical File Availability

Tender committees increasingly require the full technical file rather than a brochure. Desu supplies comprehensive technical and quality assurance documentation to institutions on request through [email protected].

8. Clinical Support After Purchase

Ask what happens after the order. Product education, size guidance and responsive technical support determine whether a framework agreement works in practice. Desu provides specialist support for surgical teams, purchasing departments and distributors.

A Short Comparison Table

Frequently Asked Questions

Can we trial the product before committing?

Evaluation samples are available for surgical assessment. Requests are handled at [email protected].

Do you supply through distributors?

Desu works with distribution partners internationally and also handles direct institutional enquiries. Contact our commercial team for arrangements in your market.

What documentation comes with a tender submission?

CE certificate, declaration of conformity, technical file, biocompatibility summary and product specifications.

9. Total Episode Cost, Not Unit Price

Unit price is the easiest number to compare and the least informative. The figure that matters is cost per completed repair, which includes the number of sheets opened per case, the waste generated by format mismatch, the incidence of leak-related reoperation, and any secondary procedure required to remove a non-resorbable implant.

A resorbable collagen membrane removes the last of these entirely. A well-matched size range reduces the second. Consequently, two products with identical list prices can differ substantially in what they actually cost a department over a year.

10. Supply Reliability and Lead Times

A specification is irrelevant if the product is not on the shelf. Confirm lead times, minimum order quantities, and whether emergency stock can be supplied at short notice. Registration status and available reference codes vary by market, so ask specifically about your country rather than accepting a general answer.

Preparing a Tender Submission

• Specification sheet with collagen type, purity, sterilisation and dimensions.
• CE certificate and declaration of conformity.
• Quality system evidence confirming ISO 13485 manufacturing.
• Biocompatibility summary covering the ISO 10993 series.
• Traceability and packaging description at lot level.
• Pricing schedule by reference code with lead times.

Desu supplies this package on request. Sending your tender template to [email protected] usually produces a faster and more complete response than a generic enquiry.

Getting a Useful Response from Suppliers

Generic enquiries produce generic answers. The fastest way to a usable comparison is to send every candidate supplier the same short list of questions and ask for written responses: stated collagen type and purity, material class, sterilisation method, crosslinking status, available formats and dimensions, certification held, biocompatibility scope, packaging and traceability, lead time, and pricing by reference code.

Responses that answer all ten in writing can be compared directly. Responses that answer in adjectives cannot. Desu supplies written answers to all ten as standard, together with the technical file, and our commercial team will also confirm registration status and available reference codes for your specific market rather than quoting a general catalogue.

Finally, remember that a framework agreement is a multi-year commitment. Build in a review point, agree how new formats or specification changes will be communicated, and confirm who your named clinical and commercial contacts will be. A supplier that answers technical questions in days rather than weeks is worth more over the life of the agreement than a marginal difference in unit price, particularly when a tender committee asks for documentation at short notice.

Request a Quotation

Product pages, size charts and the e-catalogue are published at desu.tr/. To receive pricing, the technical file, tender documentation or evaluation samples, write to [email protected]. Our specialists respond with a package matched to your institution and market.

For healthcare professionals and procurement teams. Refer to the instructions for use for clinical indications.

About Desu Medical

Desu Medical is a medical research and development company founded in 2007 and headquartered in Ankara, Turkiye. The company designs and manufactures neurosurgical devices in-house, including hydrocephalus shunt systems, external ventricular drainage sets, catheters, intracranial pressure monitoring, bone grafts and the collagen dural graft range comprising DECOLL and DURASHEET. Every dural graft is produced from more than 99.9% pure Type I bovine collagen sourced from controlled and traceable tissue, gamma sterilised, and supplied ready to use. Manufacturing operates under an ISO 13485 certified quality management system, the dural graft range carries CE certification, and biocompatibility has been evaluated across the ISO 10993 series. Desu supplies healthcare professionals internationally through direct institutional relationships and distribution partners. For product specifications, CE documentation, evaluation samples or quotations, visit desu.tr/ or contact the team at [email protected].