ISO INTERNATIONAL STANDARD 16900-12 First edition 2016-05-15 Respiratory protective devices Methods of test and test equipment - Part 12: Determination of volume-averaged work of breathing and peak respiratory pressures Appareils de protection respiratoire - Meéthodes d'essai et équipement d'essai Partie 12: Détermination du travail respiratoire en fonction du volume respiratoire et détermination des pics de pressions respiratoires Reference number IS0 16900-12:2016(E) OS1 International Organization for Standardization @ IS0 2016 HEJIANG INST OF STANDARDIZATION C1 5956617 ed without license from IHS IS0 16900-12:2016(E) COPYRIGHT PROTECTED DOCUMENT IS0 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org Internationai ibrg DrganizationforStandardization icensee-ZHEJIANG INSTOF STANDARDIZAoIS 06 - All rights reserved networking permited without license from IHS Not for Resale, 2016/7/20 08:02:21 IS0 16900-12:2016(E) Contents Page Foreword ..iv Introduction. ...vi 1 Scope. 2 Normative references 3 Terms and definitions 4 Prerequisites ..2 5 General test requirements ..2 6 Principle ? 7 Apparatus .3 7.1 Breathing machine/metabolic simulator arrangement .3 7.2 RPD headform/RPD torso .3 7.3 Pressure measurements .3 7.4 Volume measurements .3 7.5 Data acquisition 4 8 Test procedure .4 9 Calculation of work of breathing (WOB) .5 9.1 General .5 9.2 Calculations .5 9.2.1 Work of breathing 5 9.2.2 Volume averaged pressure 6 9.2.3 Elastance. ..6 10 Test report Annex A (normative) Application of uncertainty of measurement ..8 Annex B (informative) Pressure-volume plots and method of calculation of work of breathing ....10 ii See=ZHEJIANG INST OF STANDARDIZATION C1 5956617 ithout license from IHS