title: The residual volume: a graphic solution of the functional residual capacity equation.
mesh_terms: D003201:Computers; D003936:Diagnosis, Computer-Assisted; D006371:Helium; D006801:Humans; D008433:Mathematics; D008722:Methods; D009584:Nitrogen; D012129:Respiratory Function Tests / Q000295:instrumentation*; D013997:Time Factors
chemical_list: D006371:Helium; D009584:Nitrogen