#$%^&*AU2020201244A120200312.pdf#####ABSTRACT Methods and systems are described to automatically obtain and analyze a lung airway gas sample from the breath of a person for compositional analysis. These techniques may provide an improved method for example for accurately and reliably measuring nitric oxide for asthma assessment in young children and non-cognizant patients. - 1-WO 2015/143384 418 PCT/US2015/021852 Fig. 8 Expiratory Inspiratory 50 51 53 time +T T Expirtory ime tT(Ex cavty Midle Aira s Avelar1as raor trache IAirwayExpiofatoeyowee-ofdhetuppe gas an ndsoexplaobiesadEadXlwe obr lower airway some Lobes bronchi gas Gasfpr alveolar gas5 loepe of the upper 51 >;53 t2(Exp)*1 t1=T(Exp) *1 /5