EUROPEAN STANDARD EN IS0 11990 NORME EUROPEENNE EUROPAISCHE NORM October 2018 ICS 31.260; 11.040.10 Supersedes EN IS0 11990-1:2014, English Version Lasers and laser-related equipment - Determination of laser resistance of tracheal tube shaft and tracheal cuffs (IS0 11990:2018) Lasers et équipements associés auxlasers Laserund Laseranlagen-Bestimmung der Détermination de la résistance au laser des axe et Laserresistenz von Trachealtubusschaft und ballonnet de tubes trachéaux (IS0 11990:2018) Trachealtubusmanschette (IS0 11990:2018) This European Standard was approved by CEN on 5 August 2018. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre ortoanyCENmember. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. cen EUROPEAN COMMITTEE FOR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPAISCHES KOMITEE FUR NORMUNG CEN-CENELECManagementCentre: Avenue Marnix17,B-10o0Brussels @2018CEN All rights of exploitation in any form and by any means reserved Ref.No.ENIS0 11990:2018:E worldwide for CEN national Members European foreword This document (EN IS0 11990:2018) has been prepared by Technical Committee IS0/TC 172 "Optics and photonics" in collaboration with Technical Committee CEN/TC 123 "Lasers and photonics" the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2019, and conflicting national standards shall be withdrawn at the latest by April 2019. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN IS0 11990-1:2014 and EN IS0 11990-2:2014. This document has been prepared under a mandate given to CEN by the European Commission and the For the relationship with EU Directive(s) see informative Annex ZA, which is an integral part of this document. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, the United Kingdom Endorsement notice The text of IS0 11990:2018 has been approved by CEN as EN IS0 11990:2018 without any modification i Contents Page Foreword .iv Introduction ..V 1 Scope. .1 2 Normative references ..1 3 Terms and definitions ..1 4 Principle .3 5 Significance and use of the test .3 6 Apparatus. ..4 6.1 General. .4 6.2 Containment box 4 6.3 Specimen holder .5 6.4 Lasers and delivery systems 7 6.5 Power meter .7 6.6 Gas supply system .7 6.7 Environment 7 6.7.1 Ambientairconditions 7 6.7.2 Oxygen enriched atmospheres 8 6.8 Smoke evacuation device .8 7 Reagents and materials ..8 8 Preparation of test specimens .8 9 ..9 Preparation of apparatus 10 Test methods. .9 10.1 General conditions .9 10.2 Shaft. .9 10.3 Cuff 10 11 Interpretation of