Classification and possible function of phospholipids obtained from central airways

Phospholipids similar to those contained in surfactant can be obtained not only by bronchial lavage from peripheral airways but also by suction of mucus from central airways. In order to prove identity between the centrally obtained materials and the surfactant, we propose simultaneous application of bronchial lavage and central suction. The hypothesis that phospholipids play an important role in mucus transport by preventing the agglomeration and adhesion of mucus particles is discussed.