ISO 80369-2:2024

International
Standard
ISO 80369-2
First edition
Small-bore connectors for
2024-07
liquids and gases in healthcare
applications —
Part 2:
Connectors for respiratory
applications
Raccords de petite taille pour liquides et gaz utilisés dans le
domaine de la santé —
Partie 2: Raccords destinés à des applications respiratoires
Reference number
© ISO 2024
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Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Non-interconnectability requirements . 3
5 Material requirements . 3
6 Dimensions and tolerances . 3
6.1 R1 small-bore connectors .3
6.2 R2 small-bore connectors.3
7 Performance requirements . . 4
7.1 Leakage by pressure decay .4
7.2 Sub-atmospheric pressure air leakage.4
7.3 Stress cracking .4
7.4 Resistance to separation from axial load .4
7.5 Resistance to separation from unscrewing .4
7.6 Resistance to overriding .5
7.7 Disconnection by unscrewing . .5
Annex A (informative) Rationale and guidance . 6
Annex B (normative) Small-bore connectors for respiratory applications . 7
Annex C (normative) Reference connectors for testing small-bore connectors for respiratory
applications .16
Annex D (informative) Assessment of medical devices and their attributeswith connections
within this application .31
Annex E (informative) Summary of the usability requirements for small-bore connectors for
respiratory applications.37
Annex F (informative) Summary of small-bore connector design requirementsfor respiratory
applications .39
Annex G (informative) Summary of assessment of the design of the small-bore connectorsfor
respiratory applications.45
Annex H (informative) Reference to the IMDRF essential principles .48
Annex I (informative) Terminology — Alphabetized index of defined terms .49
Bibliography .50

iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 210, Quality management and corresponding
general aspects for products with a health purpose including medical devices, in collaboration with Technical
Committee IEC/SC 62D, Particular medical equipment, software, and systems, and with the European
Committee for Standardization (CEN) Technical Committee CEN/CLC/JTC 3, Quality management and
corresponding general aspects for medical devices, in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).
A list of all parts in the ISO 80369 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
Introduction
The small-bore connectors specified in this document conform with the requirements for non-interconnectable
characteristics of ISO 80369-1.
This document includes design and performance requirements for small-bore connectors for the respiratory
application.
It is recognised that the small-bore connectors specified in this document might not be suitable for some
medical devices or accessories within this application.
Annex A contains guidance or rationale on the requirements in this document.
This document has been prepared to support the essential principles for medical device or accessories
incorporating respiratory application small-bore connectors according to the International Medical Device
Regulators Forum (IMDRF). See Annex H.
In this document, the conjunctive “or” is used as an “inclusive or” so a statement is true if any combination of
the conditions is true.
In this document, the following verbal forms are used:
— “shall” indicates a requirement;
— “should” indicates a recommendation;
— “may” indicates a permission;
— “can” indicates a possibility or capability; and
— "must" is used to express an external constraint.
NOTE This document uses italic type to distinguish defined terms from the rest of the text. It is important for the
correct understanding of this document that those defined terms are identifiable throughout the text of this document.
A list of the terms in italics is given in Annex I.

v
International Standard ISO 80369-2:2024(en)
Small-bore connectors for liquids and gases in healthcare
applications —
Part 2:
Connectors for respiratory applications
1 Scope
This document specifies the design and dimensions for two small-bore connectors intended to be used for
connections in respiratory applications of medical devices and accessories. One connector (R1) is intended for
use on medical devices and accessories subjected to pressures up to 15 kPa (e.g. a breathing system). The
other connector (R2) is intended for use on medical devices and accessories subjected to higher pressures
between 15 kPa and 600 kPa (e.g. oxygen therapy tubing).
NOTE 1 The pressure is related to pressure available at the source to which the medical device is connected.
NOTE 2 The intended application does not preclude the use of other connectors on medical devices or accessories
within this application.
NOTE 3 Requirements for alternative connectors for this intended application are specified in ISO 80369-1.
This document does not specify requirements for the medical devices or accessories that use these connectors.
Such requirements are given in device-specific standards.
NOTE 4 If a device-specific standard does not exist, the performance and material requirements specified in
ISO 80369-1 can be used as guidance.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 178, Plastics — Determination of flexural properties
ISO 527 (all parts), Determination of tensile properties
ISO 6892-1:2019, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
ISO 14971:2019, Medical devices — Application of risk management to medical devices
ISO 80369-1:2018, Small-bore connectors for liquids and gases in healthcare applications — Part 1: General
requirements
ISO 80369-7:2021, Small-bore connectors for liquids and gases in healthcare applications — Part 7: Connectors
for intravascular or hypodermic applications
ISO 80369-20:2015, Small-bore connectors for liquids and gases in healthcare applications — Part 20: Common
test methods
ASTM D638-22, Standard Test Method for Tensile Properties of Plastics
ASTM D790-17, Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and
Electrical Insulating Materials

3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 14971, ISO 80369-1, ISO 80369-7,
ISO 803
...