EN ISO 5649:2024 PDF

Overview - EN ISO 5649:2024 (Medical laboratories & LDTs)

EN ISO 5649:2024 (published December 2024; prepared by ISO/TC 212 in cooperation with CEN/TC 140) provides a structured, state‑of‑the‑art framework for the lifecycle of laboratory‑developed tests (LDTs) used in medical laboratories. The standard establishes requirements to assure quality, safety, performance and documentation for LDTs used for diagnosis, prognosis, monitoring, prevention or treatment of medical conditions. It also covers use of regulatory‑approved IVD devices when used differently from their authorized labelling (e.g., off‑label sample types or reagents). EN ISO 5649:2024 does not prescribe discipline‑ or platform‑specific technical methods, nor does it apply to industrial manufacture of commercial IVDs or purely research‑only non‑IVD tests.

Key topics and technical requirements

• Lifecycle approach: Concepts for design, development, characterization, manufacture, validation, implementation, monitoring and retirement of LDTs. (Annex A provides an example workflow.)
• Feasibility & management system: Feasibility assessment, documented management systems, transfer procedures, and control of subcontractors.
• Performance specifications: Definition of intended use and scientific validity; reliance on literature and evidence for clinical utility.
• Risk management: Risk management system and risk differentiation tailored to the LDT’s intended use and potential patient impact.
• Safety & performance principles: Essential requirements for analytical reliability and clinical relevance.
• Validation & verification:
  • Validation master plan and documented validation activities.
  • Analytical performance requirements including measurement uncertainty.
  • Clinical performance evaluation criteria.
  • Software verification and validation where software is part of the LDT.
  • Post‑validation verification and final acceptance criteria.
• Implementation & lifecycle controls: Transfer into routine use, result reporting and interpretation, maintenance, monitoring, change management and retirement procedures.

Practical applications - who uses this standard

• Clinical laboratory directors, quality managers and technical staff implementing or approving LDTs.
• Medical laboratories adopting advanced or emerging technologies (PCR/NGS, LC‑MS/MS, IHC, imaging, algorithm‑based analyses).
• Laboratories modifying commercial IVDs for off‑label uses.
• Accreditation and regulatory bodies assessing laboratory processes, and organizations developing internal policies for LDT governance.
• Developers in clinical settings seeking a harmonized approach to LDT validation, documentation and risk control.

Related standards

• Applies in the context of existing laboratory and medical device frameworks. Laboratories often implement EN ISO 5649 alongside ISO 15189 (medical laboratory competence) and device‑related quality systems (e.g., ISO 13485) and national/regional IVD regulations.

EN ISO 5649:2024 is essential for ensuring reliable, safe and documented use of LDTs while maintaining appropriate risk and quality controls in modern medical laboratories.