The terms chronic bronchitis and emphysema were formally defined in 1959 at the CIBA guest symposium and in 1962 at the American Thoracic Society Committee meeting on Diagnostic Standards.
Istilah bronkitis kronis dan emfisema kemudian secara formal didefinisikan pada 1959 dalam simposium tamu CIBA dan pada 1962 dalam pertemuan KomisiAmerican Thoracic Society tentang Standar Diagnostik.