SIST EN ISO 17256:2026

Overview

SIST EN ISO 17256:2026 establishes comprehensive requirements for respiratory therapy tubing and connectors used in both healthcare and homecare environments. Developed by ISO Technical Committee 121 and adopted as a European standard, this document ensures safe, standardized delivery of respirable gases such as oxygen, air, oxygen/air mixtures, and various medicinal gas combinations to patients. The primary objective is to facilitate secure connections between gas supply devices and patient interfaces, enhancing safety and interoperability while minimizing the risk of incorrect connections.

This standard specifically addresses respiratory tubing and connectors but excludes devices such as anesthetic workstations, ventilators, and breathing tubes intended for breathing systems as covered by ISO 5367.

Key Topics

• Scope and Purpose: Focuses on respiratory therapy tubing and connectors designed to convey medical gases safely to patients in diverse care settings.
• Design and Safety Requirements:
  • Tubing and connectors must be robust, capable of withstanding specified axial forces and pressure without detachment or fracture.
  • Connectors must be permanently attached to prevent accidental removal and misconnections.
• Compatibility: Ensures that connectors are compatible with commonly used gas-specific outlets and patient interfaces, reducing the risk of misconnections with other medical devices.
• Performance Criteria:
  • Maximum allowable flow resistance and leak rates.
  • Flexibility of extension tubing for effective use in both clinical and homecare environments.
• Biocompatibility: Materials must comply with relevant biological safety standards, safeguarding patients from exposure to harmful substances.
• Packaging and Labelling: Mandates clear manufacturer information and warnings, especially when devices are recommended for use with fire-activated shut-off valves.

Applications

Respiratory therapy tubing and connectors compliant with SIST EN ISO 17256:2026 are critical in various medical settings, including:

• Hospitals and Clinics: Ensuring error-free and secure delivery of oxygen and medical gas mixtures during respiratory therapy, emergency care, and routine treatments.
• Homecare Environments: Supporting long-term oxygen therapy and portable gas delivery in non-clinical settings where trained medical personnel may not always be present.
• Special Use Cases: Providing flexibility and safety in facilities such as MRI units, endoscopy suites, and patient transport, where extended tubing may be required.
• Patient Safety: Minimizing risks associated with misconnection, blockages, or leaks, which could compromise patient care.

By standardizing connector types and the performance of tubing systems, this standard enhances interoperability across devices from different manufacturers and boosts patient safety throughout the gas supply chain.

Related Standards

SIST EN ISO 17256:2026 references and aligns with several key international standards:

• ISO 18190: General requirements for airways and related anaesthetic and respiratory equipment.
• ISO 80369-2: Small-bore connectors for liquids and gases in healthcare applications, addressing respiratory small-bore connectors to prevent misconnections.
• ISO 5367: Specifies requirements for breathing tubes used in respiratory systems, not covered by this standard.
• ISO 18562-1: Biocompatibility evaluation of breathing gas pathways in healthcare.
• ISO 20417: Information to be supplied by medical device manufacturers.

Compliance with these standards ensures broader compatibility, patient safety, and regulatory adherence, supporting the delivery of high-quality respiratory care in medical and home environments.