Nitrous oxide^during expiration:VFr/PPres:Pt:Airway adaptor:Qn
nitrous oxide^during expiration:vfr/ppres:pt:airway adaptor:qn
Nitrous oxide^during expiration:VFr/PPres:Pt:Airway adaptor:Qn
nitrous oxide^during expiration:vfr/ppres:pt:airway adaptor:qn