ISO 80601-2-55:2018

Overview

ISO 80601-2-55:2018 specifies particular requirements for the basic safety and essential performance of respiratory gas monitors (RGMs) - medical electrical equipment intended for continuous patient monitoring. The standard covers monitoring of anaesthetic gases, carbon dioxide (CO2) and oxygen (O2). It applies to RGMs both as stand‑alone devices and when integrated into equipment such as anaesthetic workstations or ventilators. Note: it is not applicable to RGMs intended for use with flammable anaesthetic agents.

Key topics and technical requirements

The standard augments the IEC 60601 series and addresses device‑specific safety and performance elements, including:

• Scope and classification: definitions, device/system classification and accessories that affect RGM safety.
• Basic safety requirements: electrical, mechanical, thermal and radiation protections consistent with medical electrical equipment practices.
• Accuracy, calibration and zeroing: requirements for measurement accuracy, calibration procedures and periodic zeroing to ensure reliable CO2 and O2 readings.
• Alarm systems and usability: guidance and mandatory requirements for alarms, operator interfaces and human factors to reduce user error (aligned with IEC 60601‑1‑8 and IEC 60601‑1‑6).
• Electromagnetic compatibility (EMC): EMC tests and immunity requirements to ensure reliable operation in clinical environments (aligned with IEC 60601‑1‑2).
• Sampling and gas handling: topics such as sampling flowrate, gas contamination and port connectors for diverting RGMs are addressed to preserve measurement integrity.
• Functional connection and data interfaces: requirements for safe functional connections and standardized data exchange (informative annex on data interfaces).
• Marking, labeling and documentation: updated requirements for warnings, safety notices and accompanying documents.
• Risk and fault conditions: identification and mitigation of hazardous situations and fault handling.

Applications and users

ISO 80601-2-55:2018 is used by:

• Medical device manufacturers to design and develop compliant RGMs and integrate them into anaesthetic workstations and ventilators.
• Test laboratories and certification bodies for type testing and conformity assessment against basic safety and essential performance criteria.
• Clinical engineers and biomedical maintenance teams for procurement specifications, maintenance, and calibration policies.
• Regulatory authorities and quality/CE marking processes that reference IEC/ISO medical electrical equipment standards.

Practical applications include device design review, pre‑market testing, clinical deployment in operating rooms, ICUs and procedural suites, and establishing calibration and alarm management procedures.

Related standards

• IEC 60601‑1: General requirements for basic safety and essential performance
• IEC 60601‑1‑2: Electromagnetic disturbances - Requirements and tests
• IEC 60601‑1‑6: Usability
• IEC 60601‑1‑8: Alarm systems
• ISO 15223‑1, ISO 7000/7010: labeling and graphical symbols

Keywords: ISO 80601-2-55:2018, respiratory gas monitor, RGM, anaesthetic gas monitoring, CO2 monitoring, oxygen monitoring, medical electrical equipment, calibration, alarm systems, EMC.