This is the ValueSet that contains all the codes in IVR valueset ventilation (.143.11.46) (http://fhir.ch/ig/ch-ems/ValueSet/IVR-VS-ventilation) and IVR Ventilation (http://fhir.ch/ig/ch-ems/ValueSet/IVR-VS-ventilation). E.g. what you have to deal with if you get resources containing codes in either of them