title: [Postural drainage theory. Especially concerning the movement of sputum plugs and the resonance frequency of sputum (author's transl)].
mesh_terms: D000818:Animals; D002645:Chickens; D004322:Drainage / Q000379:methods; D066298:In Vitro Techniques; D008954:Models, Biological; D011187:Posture; D013183:Sputum / Q000502:physiology*; D014732:Vibration / Q000627:therapeutic use