Overview
ISO 21856:2022 - Assistive products: General requirements and test methods defines broad safety, performance and testing expectations for assistive products that are considered medical devices in some jurisdictions. The standard covers general design, materials, usability, hygiene, electrical and mechanical safety, and a wide range of test methods used to verify product conformity. It explicitly excludes products that achieve their purpose by administering pharmaceuticals and notes that not all assistive products in ISO 9999 are medical devices.
Key topics and technical requirements
ISO 21856 provides structured requirements and test methods across many technical areas, including:
- Risk analysis and management - requirement for documented risk approach tied to intended performance.
- Intended performance, technical documentation and clinical evaluation - guidance for specifying and evidencing how products meet intended use.
- Materials and flammability - requirements for upholstery, polymers, electrical parts and contamination control.
- Biocompatibility, toxicity and contamination - expectations for materials that contact users, residues and leakage.
- Infection control and sterility - cleaning, disinfection, machine-washable items and sterilization maintenance.
- Mechanical safety - prevention of squeeze, trap and fall hazards; safety of moving parts; folding and locking mechanisms.
- Load limits, stability and support/suspension - static and dynamic force testing for products that support or suspend users.
- Emitted sound, vibration and audible warnings - limits and testing for user comfort and safety.
- Electromagnetic compatibility (EMC) and electrical safety - requirements for electrically powered assistive products, battery indicators and ingress protection.
- Liquid ingress, leakage, overflow and spillage tests - methods to verify resistance to fluids and maintain function.
- Portability, carrying handles, tips and surfaces - ergonomic and durability tests for mobile and hand-held devices.
- Special groups - clauses addressing assistive products for children and persons with sensory or cognitive impairments.
Applications and who uses it
ISO 21856 is intended for:
- Manufacturers and designers of assistive devices seeking baseline safety and test guidance during product development.
- Test laboratories and certification bodies performing conformity assessment and verification testing.
- Regulators and procurement teams evaluating device safety, usability and clinical evidence.
- Clinicians, therapists and care providers who need to understand product safety, cleaning and use characteristics.
Typical applications: product design validation, safety risk assessments, pre-market testing for electrical/EMC safety, infection-control protocols, durability and mechanical safety testing, and documentation for regulatory submissions.
Related standards
- ISO 9999 (classification of assistive products) is referenced for scope decisions.
- ISO 21856 is a general framework; additional specific international standards apply for particular types of assistive products (see normative references in the standard).
Keywords: ISO 21856, assistive products, test methods, medical devices, electrical safety, biocompatibility, infection control, usability, standards.
