This is the ValueSet that contains all the codes in IVR valueset procedure airway type (.143.11.40) (http://fhir.ch/ig/ch-ems/ValueSet/IVR-VS-procAirType) and IVR Procedure Airway Type (http://fhir.ch/ig/ch-ems/ValueSet/IVR-VS-procAirType). E.g. what you have to deal with if you get resources containing codes in either of them