IEC 80601-2-71:2025

Overview

IEC 80601-2-71:2025 sets forth the particular requirements for the basic safety and essential performance of functional near-infrared spectroscopy (functional NIRS) equipment. This International Standard, developed by ISO and IEC, specifically addresses the unique risks and operational characteristics of functional NIRS devices, which are widely used in non-invasive brain monitoring and neuroimaging. The standard ensures that such medical electrical equipment meets recognized benchmarks for safety, performance, user information, and electromagnetic compatibility, promoting reliability and patient protection in clinical and research environments.

Key Topics

• Scope of Applicability:

  • Applies only to functional NIRS equipment, as defined in the standard, used as a standalone device or as part of a medical electrical (ME) system.
  • Excludes devices such as tissue oximeters, frequency-domain/time-domain NIRS, and devices for monitoring chromophores other than oxy- and deoxy-haemoglobin.
  • Not intended for cerebral tissue oximeters (covered by ISO 80601-2-85) or pulse oximeters (ISO 80601-2-61).

• Basic Safety and Essential Performance:

  • Establishes requirements for safe operation, minimizing electrical, mechanical, thermal, and optical hazards.
  • Addresses essential performance, including reliable temporal profiling of haemoglobin changes and managing alarm conditions for high/low signal detection.
  • Includes aspects of risk management specific to functional NIRS applications.

• Testing and Performance Evaluation:

  • Specifies test methods and acceptance criteria for key performance attributes such as signal stability, noise ratio, measurement channel integrity, and response times.
  • Provides guidance on performance validation using a functional NIRS phantom to simulate pathlength-dependent haemoglobin changes.

• Labelling and Documentation:

  • Mandates that manufacturers supply clear, comprehensive information and documentation consistent with ISO 20417.
  • Details marking requirements, including special considerations for devices used in MRI environments (e.g., 'MR Safe' or 'MR Conditional' labeling per IEC 62570).

Applications

Functional NIRS equipment is vital in the following areas:

• Neuromonitoring:

  • Used for real-time monitoring of cerebral oxygenation and haemodynamic changes in operating rooms, intensive care units, and neurocritical care.

• Neuroimaging Research:

  • Enables the study of brain function and hemodynamics during cognitive, sensory, or motor tasks in controlled settings.

• Developmental and Pediatric Studies:

  • Widely deployed in newborn and pediatric neurodevelopmental research due to its non-invasive nature.

• Rehabilitation Medicine:

  • Assists in tracking brain activity during rehabilitation exercises for stroke recovery or traumatic brain injury assessment.

By conforming to IEC 80601-2-71:2025, manufacturers, healthcare providers, and researchers can ensure that functional NIRS devices meet current international standards for safety and performance, facilitating broad clinical and research adoption.

Related Standards

Several standards are critical for manufacturers and users of medical electrical equipment in conjunction with IEC 80601-2-71:2025:

• IEC 60601-1 Series: General safety and basic performance requirements for medical electrical equipment.
• ISO 20417:2021: Information to be supplied by the manufacturer of medical devices.
• IEC 62570:2014: Safety marking standards for devices used in the magnetic resonance environment.
• IEC 62471:2006: Photobiological safety of lamps and lamp systems.
• ISO 80601-2-85: Requirements for cerebral tissue oximeter equipment.
• ISO 80601-2-61: Requirements for pulse oximeter equipment.

Compliance with these related standards ensures comprehensive coverage of safety, performance, and user information requirements for all aspects of functional NIRS equipment.

By aligning with IEC 80601-2-71:2025 and its related standards, manufacturers and healthcare organizations demonstrate a commitment to the highest levels of safety and effectiveness in the use of functional near-infrared spectroscopy technology.