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GB/T 30661.9-2024: Wheelchair seating - Part 9: Interface pressure mapping guidelines for seating
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 30661.9-2024 | English | 444 |
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Wheelchair seating - Part 9: Interface pressure mapping guidelines for seating
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GB/T 30661.9-2024
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Standard similar to GB/T 30661.9-2024 GB/T 30661.12 GB/T 30661.13 GB/T 30661.11 Basic data | Standard ID | GB/T 30661.9-2024 (GB/T30661.9-2024) | | Description (Translated English) | Wheelchair seating - Part 9: Interface pressure mapping guidelines for seating | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Y14 | | Classification of International Standard | 11.180.10 | | Word Count Estimation | 22,296 | | Date of Issue | 2024-10-26 | | Date of Implementation | 2025-02-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 30661.9-2024: Wheelchair seating - Part 9: Interface pressure mapping guidelines for seating---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT30661.9-2024
ICS 11.180.10
CCSY14
National Standard of the People's Republic of China
Wheelchair seats. Part 9.Seat interface
Pressure Distribution Guidelines
Released on October 26, 2024
Implementation on February 1, 2025
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Application 5
4.1 Seat Comparison 5
4.2 Wheelchair Settings 6
4.3 Passenger/Caregiver Education 6
4.4 Dynamic Activities 6
4.5 Matters related to daily life activities 6
5 Evaluation of the test plan 6
5.1 Infection Control 7
5.1.1 Washing hands 7
5.1.2 Avoid cross infection 7
5.1.3 Protective mat 7
5.2 Settings 7
5.2.1 Seat Cushion Setting 7
5.2.2 Preparing the test plan 7
5.2.3 Preparation of passenger files 7
5.2.4 Consistency 7
5.2.5 Check the orientation of the mat 8
5.2.6 Checking the position of the mat 8
5.2.7 Make the cushion fit the seat 8
5.2.8 Adapt the seat cushion to the test environment 8
5.3 Transferring the occupant to the test position 8
5.3.1 Transfer Plate 8
5.3.2 Removal of unnecessary items 8
5.3.3 Inspection after occupant transfer 8
5.3.4 Consistency in testing 8
5.3.5 Stabilization Time 9
5.4 Explaining pressure distribution to passengers 9
5.4.1 Screen Position 9
5.5 Obtaining Data 9
5.5.1 Locating bony prominences 9
5.5.2 Recording one or more images 9
5.5.3 Repeat step 9
5.5.4 Checking the Image 9
5.5.5 Verification Image 10
6 File 10
6.1 File Naming Rules 10
6.2 File Location 10
6.3 Make timely annotation records10
6.4 Report 10
6.5 Photo Files 11
6.6 Data Backup 11
7 Explanation 11
7.1 Unexpected Images 11
7.2 Unsatisfactory image 11
7.3 The image shows no abnormality 11
7.4 IPM images and metrics 11
7.4.1 Contour (2D)/Contour Image 12
7.4.2 3D/Surface View 12
7.4.3 Center of Pressure (CoP) 13
7.4.4 Inclination 13
7.4.5 Asymmetry 13
7.4.6 Image Conversion 14
7.4.7 Smoothing 14
8 Limitations 14
8.1 Prediction of Pressure Injury 14
8.2 Microclimate 14
8.3 Clothes 14
8.4 Repeatability and correlation values 15
8.5 Effects of Posture 15
8.6 Sampling Frequency 15
Reference 16
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document is Part 9 of GB/T (Z) 30661 Wheelchair Seats. GB/T (Z) 30661 has been published in the following parts.
--- Part 1.Vocabulary, reference axis rules and measurement of body parts, body positions and body support surfaces;
--- Part 2.Determination of physical and mechanical properties of devices for maintaining tissue integrity - Seat cushions;
--- Part 3.Determination of static, impact and fatigue strength of body support devices;
--- Part 4.Seat systems for use in motor vehicles;
--- Part 6.Simulated use and determination of changes in seat cushion performance;
--- Part 9.Guidelines for seat interface pressure distribution;
--- Part 10.Flame retardancy requirements and test methods for body support devices;
--- Part 11.Determination of perspiration dissipation characteristics of seat cushions;
--- Part 12.Testing of seat cushion wrapping and sinking characteristics using a double hemisphere loader;
--- Part 13.Determination of lateral stability of seat cushions.
This document is equivalent to ISO /T R16840-9.2015 "Wheelchair seats - Part 9.Guidelines for pressure distribution at the clinical interface of the seat".
The document type was adjusted from ISO 's technical report to my country's recommended national standard.
This document adds a chapter on “Normative References”.
The following minimal editorial changes have been made to this document.
--- To coordinate with the existing standard, the name of the standard is changed to "Wheelchair seats Part 9.Guidelines for seat interface pressure distribution".
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document is issued by the Ministry of Civil Affairs of the People's Republic of China.
This document is under the jurisdiction of the National Technical Committee for Standardization of Rehabilitation and Special Equipment for Persons with Disabilities (SAC/TC148).
This document was drafted by. National Rehabilitation Assistive Devices Research Center, Xiamen Kunjin Electronic Technology Co., Ltd., National Rehabilitation Assistive Devices Research Center Kang
Quality Supervision and Inspection Center for Assistive Devices, Beijing University of Aeronautics and Astronautics.
The main drafters of this document are Gu Huiru, Li Man, Wu Sainan, Ren Weiyan and Yan Hong.
introduction
Wheelchair Seats is a standard that ensures the performance and quality of wheelchair seats and accurately provides these performance and quality to relevant parties.
The users of chairs and cars want to know the performance and quality of the products, the manufacturers want to know how to achieve better quality, and the inspection agencies want to know how to achieve better quality.
Know how to inspect the product. Because the Wheelchair Seat is too long, and the parties using the document generally only need part of it.
Since the content is not updated synchronously, it is compiled in parts and is intended to consist of the following parts.
--- Part 1.Vocabulary, reference axis rules and measurement of body parts, body positions and body support surfaces;
--- Part 2.Determination of physical and mechanical properties of devices for maintaining tissue integrity - Seat cushions;
--- Part 3.Determination of static, impact and fatigue strength of body support devices;
--- Part 4.Seat systems for use in motor vehicles;
--- Part 6.Simulated use and determination of changes in seat cushion performance;
--- Part 9.Guidelines for seat interface pressure distribution;
--- Part 10.Flame retardancy requirements and test methods for body support devices;
--- Part 11.Determination of perspiration dissipation characteristics of seat cushions;
--- Part 12.Testing of seat cushion wrapping and sinking characteristics using a double hemisphere loader;
--- Part 13.Determination of lateral stability of seat cushions;
--- Part 14.Concepts related to the control of external forces to maintain tissue integrity;
--- Part 15.Selection, placement and fixing of flexible body support devices in seats.
Part 1 and Part 14 are terms and definitions, Part 2, Part 3, Part 10 and Part 12 are wheelchair seat cushions
Physical and flame retardant performance tests, Part 6, Part 11, and Part 13 are mainly related to the test methods of seat performance, and Part 4 is a special
Part 9 provides assessment information and Part 15 is about flexible body support devices.
The purpose of this document is to provide information on the application of Interface Pressure Profile (IPM) in the assessment of individuals and their seat systems and to inform users
Achievable effects and limitations.
Rehabilitation therapists are increasingly using Interface Pressure Mapping (IPM) when evaluating and selecting seating systems for occupants.
To achieve the optimal value, rehabilitation therapists need to have basic knowledge of interface pressure distribution (see Chapter 3), identify and apply appropriate IPM methods, and
The ability to develop a sound plan (see Chapter 5), prepare correct IPM documentation (see Chapter 6), and have the skills to interpret the data collected (see Chapter 7).
In clinical or rehabilitation settings, the purpose of IPM testing may be different. In some cases, it may be to compare different pressure treatments or postures.
The tool that maintains the cushion's performance can also be used to support the rehabilitation therapist in determining the best fit between the occupant and the cushion.
A large number of application pictures are included. No matter what kind of application, the main purpose of using IPM needs to be clear from the beginning.
Wheelchair seats. Part 9.Seat interface
Pressure Distribution Guidelines
1 Scope
The purpose of this document is to guide users directly involved in the evaluation and application of Interface Pressure Distribution (IPM) or in conjunction with wheelchairs.
Comprehensive evaluation of car seats.
This document does not cover other aspects of the assessment process (e.g., taking a medical history), nor does it cover prescriptions or treatments that result from the assessment.
It is not meant to replace the inference and judgment of the entire clinical assessment.
This document covers the latest technology of IPM experience in seat cushion application scenarios. Most of the principles included can be extended to the whole body (bed) or foot
Department assessment.
2 Normative references
This document has no normative references.
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
calibration
The process of detecting the pad under known force is carried out in the sensing mat, and the sensor response data is monitored and modeled in the software.
NOTE. The response is recorded (called a calibration file) and whenever the sensor outputs a similar response, the result is related to a known force. In most cases, this is
This is accomplished by placing the cushion in a chamber with an inflatable bladder. The bladder is inflated, and the pressure inside the bladder is measured. This assumes uniform pressure across the cushion.
Calibration enables the software to adapt to changes in the sensor's behavior over time (creep) or pressure (hysteresis).
Recalibrate the mat when readings appear unreliable, after excessive use, or at the manufacturer's recommended intervals.
The usage and the last calibration date are recorded. It is recommended to keep the old calibration files (which can be used for comparison to determine the period of time).
change).
3.2
One of the statistical methods used to evaluate the uniformity of pressure distribution on the support surface, expressed as a percentage, see formula (1).
Coefficient of variation =
Standard deviation
average value
(1)
NOTE. The lower the CoV value, the lower the variability of the dataset.
3.3
conformity
The ability of IPM mats to conform to irregular shapes without wrinkling.
3.4
contact area
The area that bears the load.
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