Mucociliary transport in the subglottic space of 60 human larynges excised for ca was investigated using a marking substance--Sudan B. The reflex method was used for observations of ciliary activity. The video film and photographs were taken during observations. Mucociliary transport was demonstrable in subglottic space of 55% of investigated larynges. The direction of the transport was pathological, but invariable during observations. 37% of the larynges without transport showed ciliary activity. The presence and absence of the mucociliary transport was independent activity. The presence and absence of the mucociliary transport was independent of the location and the degree of the clinical progression. Analysis of the factors influencing on disturbances of mucociliary transport was carried out.
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