What Is MDR 2017/745? A Plain-English Guide
Published 1 March 2026 · 8 min read
The Short Version
Regulation (EU) 2017/745, commonly called the MDR (Medical Devices Regulation), is the EU law that governs how medical devices are designed, manufactured, placed on the market, and monitored after they reach hospitals and patients. It replaced the older Medical Devices Directive (MDD 93/42/EEC) and the Active Implantable Medical Devices Directive (AIMDD 90/385/EEC).
If you work in a hospital in Ireland or anywhere in the EU, the MDR affects you — whether you handle surgical instruments, manage infusion pumps, procure patient monitors, or oversee sterilisation equipment.
Why Did the EU Replace the Old Rules?
The old Medical Devices Directive dated from 1993. Medical technology has changed enormously since then — think software-as-a-medical-device, AI-driven diagnostics, 3D-printed implants, and connected devices. The MDD was also exposed by several safety scandals, most notably the PIP breast implant crisis and problems with metal-on-metal hip replacements.
The MDR was adopted in May 2017 with a stronger focus on:
- Patient safety — Stricter clinical evidence requirements before a device reaches the market.
- Traceability — Unique Device Identification (UDI) and the EUDAMED database so every device can be tracked.
- Post-market obligations — Manufacturers must actively monitor device performance in the field, not just at the point of CE marking.
- Transparency — Summary of Safety and Clinical Performance (SSCP) for high-risk devices, accessible to the public.
What Changed for Hospital Staff?
If you work in a clinical setting, three things matter most:
1. Incident reporting got teeth. Under MDR Article 87, healthcare institutions have an obligation to report serious incidents to the competent authority — in Ireland, that\u2019s the HPRA (Health Products Regulatory Authority). The definition of a \u201cserious incident\u201d is broader than before.
2. Device classification is more complex. MDR Annex VIII introduced new classification rules, and some devices that were previously lower-risk (e.g., certain software, reprocessed devices) are now classified higher. Your procurement and clinical engineering teams need to understand these changes.
3. Vigilance is everyone\u2019s business. Post-market surveillance isn\u2019t just a manufacturer problem. Hospitals contribute real-world evidence by reporting incidents, responding to Field Safety Corrective Actions (FSCAs), and tracking device performance.
Key Terms You\u2019ll Hear
- CE Marking
- The mark that indicates a device conforms to EU safety requirements. Under MDR, the route to CE marking is stricter.
- Notified Body
- An independent organisation designated by an EU member state to assess whether a device meets regulatory requirements. Under MDR, Notified Bodies are subject to tougher oversight.
- UDI (Unique Device Identification)
- A code system that identifies every device uniquely, enabling traceability from manufacturer to patient.
- EUDAMED
- The European Database on Medical Devices — a central EU system for device registration, certificates, vigilance data, and clinical investigations.
The Irish Angle
In Ireland, the competent authority for medical devices is the HPRA. If you\u2019re a nurse, doctor, or technician in an HSE hospital and you encounter a device malfunction that causes or could cause harm, you report it through your local incident management system and via the HPRA\u2019s online reporting portal.
The HPRA publishes guidance documents, safety notices, and field safety corrective actions on their website. For MDR-specific guidance, they work closely with the Medical Device Coordination Group (MDCG) at EU level.
Want to Go Deeper?
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