IVDR Verification of Class D IVDs: Notified Body & EURL Guide
Overview: Class D IVD Verification Summary
Under the European In Vitro Diagnostic Medical Device Regulation (IVDR) 2017/746, high-risk Class D IVD devices must undergo strict batch verification before being placed on the market. Manufacturers must submit batch test reports and samples to a designated Notified Body. The Notified Body collaborates with European Union Reference Laboratories (EURLs) to perform independent batch testing. Only after verified compliance can the manufacturer distribute the batch.
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Overview of IVDR Verification for Class D Medical Devices
Under the European Union Regulation (EU) 2017/746, Class D in vitro diagnostic devices represent the highest risk category to public health and individual safety. To demonstrate conformity, manufacturers of Class D IVDs are required to complete a formal conformity assessment involving an officially designated Notified Body.
As part of this assessment, manufacturers must verify every manufactured batch by:
Submitting detailed quality control test reports for each production batch to their designated Notified Body.
Making device samples or full batches available for independent verification.
Facilitating laboratory batch testing carried out by European Union Reference Laboratories (EURLs) designated by the European Commission.
Only after successful verification of conformity can the manufacturer proceed to place Class D IVDs on the European market.
Notified Body Procedures & Contractual Framework
The manufacturer appoints a Notified Body to carry out conformity assessment activities. To ensure smooth operations, formal contractual agreements between the manufacturer and the Notified Body must define all operational arrangements for batch verification.
Key Requirements for Notified Bodies:
Contractual Arrangements: The agreement must cover all preparations for testing, including detailed test plans, sample transport protocols, and full batch records (such as batch release quality control results and historical verification conclusions).
Mandatory Change Reporting: The manufacturer must commit to informing the Notified Body of any device modifications that impact batch verification, as well as sharing updated scientific, technical, or clinical data.
Documented Quality Processes: Notified Bodies must establish formal, documented processes for:
Managing verification procedures.
Establishing test plans that evaluate all critical and relevant performance parameters.
Defining clear timelines and locations for testing in agreement with the manufacturer.
EURL Laboratory Testing: Agreements & Protocols
When a Class D IVD requires verification testing by a European Union Reference Laboratory (EURL), the Notified Body coordinates the testing arrangements. A dedicated written agreement between the Notified Body and the EURL establishes testing protocols.
Protocol Framework for EURL Testing:
Written Agreements: Contracts specify testing parameters, sample handling, batch documentation, and target completion timeframes (typically 30 days).
Information Exchange: The Notified Body commits to providing the EURL with relevant scientific, technical, or clinical observations emerging from conformity checks.
Testing Frequency Criteria: The frequency of sending samples to an EURL is governed by the historical failure rates of the device and the relative risk associated with its intended use. Higher testing frequency applies to:
Devices exhibiting higher failure rates during manufacturing or clinical use.
Assays detecting or exposing patients to transmissible agents.
Blood grouping diagnostic devices.
Frequency Reduction: The Notified Body, in coordination with the EURL, can reduce batch testing frequency if the manufacturer demonstrates a proven track record of consistent quality and performance.
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Batch Sample Testing Guidelines
The total number of batches subject to independent verification depends on the intended purpose and risk profile of the device:
First-Line Assays & Diagnostic Devices: Every single manufactured batch must undergo EURL batch testing prior to release.
Other Class D Devices: The Notified Body determines the specific number of batches requiring verification by evaluating:
The manufacturer’s internal batch-testing regime.
The scientific opinion provided by the EURL.
Guidance and opinions from additional expert panels where applicable.
Understanding the role of Notified Bodies and following a structured Notified Body selection process enables medical device companies to prevent regulatory bottlenecks during batch testing.
Regulatory Reference: Guidance on Notified Body and EURL verification processes adapted from MDlaw Information Platform on European Medical Device Regulations.
How Operon Strategist Accelerates IVDR Class D Compliance
Navigating the stringent batch verification rules of EU IVDR 2017/746 requires structured regulatory execution. Operon Strategist supports global diagnostic manufacturers through every step of IVD manufacturing compliance and technical filing:
Technical Documentation & Dossier Review: Drafting, structuring, and reviewing comprehensive Class D technical files for CE Mark submission to ensure alignment with IVDR requirements.
Notified Body & EURL Coordination: Assisting manufacturers in establishing testing protocols, test plans, and contractual frameworks required for Notified Body and EURL verification.
Quality Management System (QMS) Alignment: Ensuring internal batch release protocols and quality controls meet ISO 13485 and IVDR Annex IX/XI standards.
Regulatory Gap Analysis: Identifying risk parameters, post-market surveillance needs, and scientific validity data to maximize first-pass conformity approval.
Strategic Regulatory Consulting: Unlocking global market opportunities for IVD manufacturers by streamlining global compliance pathways across European and international markets.
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FAQ's
What is IVDR Class D verification?
It is a mandatory conformity assessment process under EU 2017/746 where high-risk IVD batches are independently verified by a Notified Body and an EURL before market release.
Which devices fall under Class D under IVDR?
Class D includes the highest-risk IVDs, such as blood grouping systems and assays detecting transmissible infectious agents in blood or tissue.
What role does an EURL play in Class D verification?
European Union Reference Laboratories (EURLs) conduct independent laboratory batch testing on samples submitted by the Notified Body to verify product performance.
How long does EURL batch testing take?
Standard contractual arrangements between Notified Bodies and EURLs typically establish a target testing timeframe of 30 days.
Must every single batch of a Class D IVD be tested?
Every single batch must be tested for first-line assays and high-risk diagnostic devices; for other Class D devices, testing frequency is determined based on device risk and historical performance.