Overview
EN ISO 27427:2023 - Anaesthetic and respiratory equipment: Nebulizing systems and components defines safety and performance testing for general-purpose nebulizing systems used to deliver liquids as aerosols to the human respiratory system. The standard covers continuous and breath‑actuated delivery and includes gas‑powered, electrically powered (e.g., spinning disc, ultrasonic, vibrating mesh - active and passive - and capillary) and manually powered nebulizers. It does not set minimum performance limits, nor does it cover electrical installation requirements for electrically powered devices. Exclusions include devices for nasal deposition, humidification-only devices, and drug‑specific inhalers.
Key topics and technical requirements
- Scope and device types: gas‑powered, electrically powered, and manual nebulizers for pulmonary delivery.
- Safety and performance testing: requirements for meaningful manufacturer test claims including aerosol output, aerosol output rate and particle sizing.
- Test methods and calibration: normative test procedures for aerosol output and particle size (see Annex C and D) and options for alternative test methods and calibration/setup.
- Materials and biocompatibility: selection of compatible, biocompatible materials for components exposed to liquids and patient interfaces.
- Design requirements: inlet/outlet ports, flow‑direction sensitive components, rotary controls, and features affecting cleaning, disinfection or sterilization.
- Packaging and sterile supply: requirements for devices supplied sterile and for packaging/marking.
- Information for users: required markings and instructions for use, including performance disclosures and driving gas supply information.
- Supporting annexes: rationale (Annex A), respirable particle diameters (Annex B), hazard identification for risk assessment (Annex E), and device classification (Annex F).
Applications and who uses this standard
EN ISO 27427:2023 is used by:
- Medical device manufacturers designing, validating or labeling nebulizing systems.
- Test laboratories and certification bodies performing performance and safety testing.
- Regulatory and quality teams assessing compliance and preparing technical documentation.
- Procurement and hospitals evaluating nebulizer suitability and interoperability.
- R&D and product engineers choosing materials, designing interfaces, and specifying cleaning/sterilization processes.
Practical benefits include clearer manufacturer performance claims, improved patient safety, device compatibility guidance, and harmonized test methods for aerosol output and particle sizing.
Related standards
- ISO 18190 - general standard for airway devices (format alignment; device‑specific rules in ISO 27427 take precedence).
- ISO 80601‑2‑74 and ISO 20789 - cover humidification and related devices.
- ISO 20072 - covers drug‑specific nebulizers and inhalers.
Keywords: EN ISO 27427:2023, nebulizing systems, nebulizers, aerosol delivery, particle sizing, safety and performance testing, vibrating mesh, ultrasonic nebulizer, gas‑powered nebulizer, biocompatibility, medical device testing.
