ISO 16840-11:2022

Wheelchair seating — Part 11: Determination of dissipation characteristics of sensible perspiration into seat cushions

This document specifies a method for determining the dissipation characteristics of simulated sensible perspiration exposure on seat cushions of a wheelchair under test conditions that simulate body loading on support surfaces with flat and contoured profiles. The test method is applicable to a wide variety of seat cushion materials and constructions that are used across the world. The test method is intended to determine how the cushion handles a liquid load. It is not intended to determine how the cushion responds to a continuous release of liquid or vapour. This document also specifies apparatus to measure dissipation characteristics (of perspiration) of seat cushions and the approach to be employed in measuring these characteristics. This document is applicable to seat cushions for wheelchairs that include a cushion cover. NOTE The significance of the dissipation characteristics of the seat cushion can be greatly affected by the clothing worn, for example a moisture wicking cover might not help the skin condition of the patient sitting in a wet adult diaper.

Sièges de fauteuils roulants — Partie 11: Titre manque

General Information

• Status: Published
• Publication Date: 11-May-2022
• ICS: 11.180.10 - Aids and adaptation for moving
• Technical Committee: ISO/TC 173/SC 1 - Wheelchairs
• Drafting Committee: ISO/TC 173/SC 1/WG 11 - Wheelchair seating
• Current Stage: 6060 - International Standard published
• Start Date: 12-May-2022
• Due Date: 04-Nov-2022
• Completion Date: 12-May-2022

Relations

• Revises: ISO/TS 16840-11:2014 - Wheelchair seating — Part 11: Determination of perspiration dissipation characteristics of seat cushions intended to manage tissue integrity
• Effective Date: 17-Jul-2021

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 16840-11
First edition
2022-05
Wheelchair seating —
Part 11:
Determination of dissipation
characteristics of sensible
perspiration into seat cushions
Reference number
ISO 16840-11:2022(E)
© ISO 2022

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ISO 16840-11:2022(E)
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© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ISO 16840-11:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 2
5 Principle . 2
6 Test apparatus .2
6.1 Perspiration rigid cushion loading indenter . 2
6.1.1 Shape of PRCLI . 2
6.1.2 Temperature control on the PRCLI . 2
6.1.3 Loading mechanism. 3
6.1.4 Discharge mechanism . 3
6.1.5 Sensing system . 4
6.2 Electrical impedance measurement system . 4
6.3 Test environment . 4
7 Preparation for testing . 5
8 Test method . 5
9 Test report . 5
Bibliography . 8
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ISO 16840-11:2022(E)
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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
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 173, Assistive products, Subcommittee SC
1, Wheelchairs.
This first edition of ISO 16840-11 cancels and replaces ISO/TS 16840-11:2014, which has been
technically revised.
The main changes are as follows:
— addition of details around the test apparatus, preparation and method to make the test easier to
process.
A list of all parts in the ISO 16840 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.
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ISO 16840-11:2022(E)
Introduction
Dissipating perspiration and moisture on seat cushions is important to prevent pressure injuries and
tissue maceration, and for comfortable sitting. Perspiration can occur as water vapour, and/or as
moisture – sensible moisture has not undergone a phase change to vapour, whereas insensible moisture
has undergone the phase change and is in the vapour phase.
The results of the testing methods in this document have not been clinically validated to support any
medical claims of prevention of pressure injuries or prevention of tissue maceration.
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INTERNATIONAL STANDARD ISO 16840-11:2022(E)
Wheelchair seating —
Part 11:
Determination of dissipation characteristics of sensible
perspiration into seat cushions
1 Scope
This document specifies a method for determining the dissipation characteristics of simulated sensible
perspiration exposure on seat cushions of a wheelchair under test conditions that simulate body loading
on support surfaces with flat and contoured profiles. The test method is applicable to a wide variety of
seat cushion materials and constructions that are used across the world.
The test method is intended to determine how the cushion handles a liquid load. It is not intended to
determine how the cushion responds to a continuous release of liquid or vapour.
This document also specifies apparatus to measure dissipation characteristics (of perspiration) of seat
cushions and the approach to be employed in measuring these characteristics.
This document is applicable to seat cushions for wheelchairs that include a cushion cover.
NOTE The significance of the dissipation characteristics of the seat cushion can be greatly affected by the
clothing worn, for example a moisture wicking cover mig
...