Selective Venting of Cigarette Smoke in Dichotomous Ducts and Preserved Human Bronchi

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Science  08 Nov 1968:
Vol. 162, Issue 3854, pp. 668-669
DOI: 10.1126/science.162.3854.668


Mechanically generated cigarette smoke and ambient air were injected into dichotomous ducts and geometrically preserved human bronchi in a fashion simulating typical smoking technique. When the air passages were at ambient temperature, the smoke settled into the lower branches. Smoke which was injected into passages warmed to body temperature rose to the upper branches. The latter selective distribution of the smoke resembled the distribution of centrilobular emphysema in the lungs.

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