ISO 11712:2023

Overview

ISO 11712:2023 - Anaesthetic and respiratory equipment - Supralaryngeal airways and connectors - specifies essential design, dimensional and performance requirements for supralaryngeal airways (for example laryngeal masks and laryngeal tubes) and their connectors. The standard covers device sizing, basic properties, testing and manufacturer information to ensure a distinct, unobstructed respiratory pathway to the top of the larynx during spontaneous, assisted or controlled ventilation. It also defines what is outside its scope (e.g., tracheal tubes, CPAP devices, cricothyrotomy devices and devices requiring surgical placement).

Key Topics and Technical Requirements

• Design requirements and ventilation positions: Devices must permit ventilation in typical head/neck positions (supine neutral and at least 30° flexion/extension, rotation and lateral tilt) and in intended positions such as Trendelenburg (10°) and sitting (45°).
• Size designation and dimensional disclosure: Specifies a convention for size designation and requires dimensional disclosure so operators know which auxiliary devices (tracheal tubes, bronchoscopes) are size-compatible.
• Materials and biological safety: Materials guidance and biocompatibility testing are required, with reference to ISO 18562‑1 for breathing gas pathway evaluation.
• Ventilatory pathway and openings: Requirements for ventilatory openings, auxiliary openings, internal volume and safeguards against collapse of the ventilatory pathway.
• Seating mechanisms, cuffs and inflation systems: Standards for cuff design, inflation/deflation systems and seating features that position the device correctly in the pharynx.
• Connectors, cleaning and sterilization: Requirements for machine-end connectors, sterilization/packaging for sterile-supplied devices, and cleaning/disinfection instructions.
• Testing and conformity: Includes test methods, acceptance criteria and conformity checks; Annex C covers kink-resistance test methods.
• Risk management and clinical evaluation: Annex D lists hazard identification for risk assessment; Annex B provides guidance on clinical performance documentation.

Practical Applications and Users

ISO 11712:2023 is used by:

• Medical device manufacturers for product design, sizing, testing and regulatory documentation.
• Regulatory bodies and notified bodies evaluating conformity and safety.
• Clinical engineers, procurement and anesthesia teams to verify device compatibility and labeling.
• Designers and quality managers for risk management, biocompatibility and sterilization processes.

Practical benefits include improved device interoperability (connector and size compatibility), clearer instructions for use, and standardized performance criteria to enhance patient safety during airway management.

Related Standards (normative references)

• ISO 18190 - General requirements for airways and related equipment
• ISO 18562‑1 - Biocompatibility evaluation of breathing gas pathways
• ISO 4135 - Vocabulary (anaesthetic and respiratory equipment)
• ISO 5356‑1 - Conical connectors (cones and sockets)
• ISO 80369‑7 - Small-bore connectors (Luer)