ISO 11195:2018
ISO · 2018-01-01

Gas mixers for medical use - Stand-alone gas mixers

试验/规范 ICS 11.040.10 Cited by 3

1Key Takeaways

This document specifies requirements for the performance and safety of stand-alone gas mixers intended for mixing oxygen with another gas for medical use. This document does not apply to: a) blocks of flowmeters with separate controls for the flow of each gas; c) stand-alone gas mixers with more than two different gas …

2Expert Interpretation

This comprehensive analysis of the ISO 11195:2018 standard for the performance requirements and safety specifications of standalone medical gas mixers covers key technical indicators such as material compatibility, alarm systems, and gas precision control. It is suitable for anesthesia and respiratory equipment manufacturers and quality management personnel in medical institutions.

Analysis of the core content of the standard

Technical Dimensions 1995 Edition Main Changes in the 2018 Edition
Scope of Application General Gas Mixing Device Explicitly Excludes Oxygen Concentrator Connection Equipment
Material Requirements Basic Compatibility Test Newly Added Non-metallic Components Auto-ignition Temperature ≥160℃ Requirement
Alarm System Basic Sound and Light Alarm Distinguishing between attended/unattended

Chapter 4 of the standard specifies three basic performance requirements for independent gas mixers:

  • Oxygen concentration maintenance: within the range of ±5% of the set value (Clause 12.1)
  • Anti-hypoxic mixing: ensure that the output oxygen concentration is ≥20% (Chapters 11-13)
  • Reverse airflow control: ≤10ml/h (Chapter 9)

Material compatibility requirements

Clause 6.5 stipulates that metal parts in contact with oxygen are prohibited from electroplating, and non-metallic materials must pass the ISO 11114-3 auto-ignition test. In actual application, please note:

A certain brand of mixer caused a fire accident in a hyperbaric oxygen environment due to the use of silicone-containing lubricant.

Implementation recommendations

  1. Establish a risk management file in accordance with ISO 14971 (Clause 5.1)
  2. Test reverse airflow regularly (recommended monthly, Clause 20.1.b)
  3. Operator training should cover all alarm scenarios (Clause 11.5)

3Version History

ISO 11195:1995 older 1995-10
ISO 11195:2018 2018-01-01

5Citation Network

3
Cite this standard
21
Referenced herein
EN 13544-2:2002 EN 15986:2011 IEC 60601-1 Edition 3.1:2012 IEC 60601-1-6 Edition 3.1:2013 IEC 60601-1-8 AMD 1:2012 IEC 60601-1-8:2006 IEC 62366-1:2015 ISO 10524-1:2006

6Frequently Asked Questions

What is ISO 11195:2018?
ISO 11195:2018 — Gas mixers for medical use - Stand-alone gas mixers is an international standard developed by International Organization for Standardization (ISO). This document specifies requirements for the performance and safety of stand-alone gas mixers intended for mixing oxygen with another gas for medical use. This document does not apply to: a) blocks of flowmeters with separate controls for the flow...
What does ISO 11195:2018 cover?
This standard covers: This document specifies requirements for the performance and safety of stand-alone gas mixers intended for mixing oxygen with another gas for medical use. This document does not apply to: a) blocks of flowmeters with separate controls for the flow of each gas; c) stand-alone gas mixers with more...
Who should use this standard?
This standard is intended for organizations, professionals, and stakeholders involved in various industries and sectors. It is applicable to manufacturers, service providers, regulatory bodies, and certification organizations.
What is the latest version of ISO 11195:2018?
The current published version is ISO 11195:2018, published on 2018-01-01. Always check for amendments or pending revisions.
How do I purchase ISO 11195:2018?
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