title: Surface active agents in sputum evacuation: a blind comparison with normal saline solution and distilled water.
mesh_terms: D000336:Aerosols; D000438:Alcohols / Q000627:therapeutic use; D002986:Clinical Trials as Topic; D003371:Cough / Q000503:physiopathology; D005069:Evaluation Studies as Topic; D005100:Expectorants; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000209:etiology / Q000628:therapy*; D009092:Mucous Membrane / Q000503:physiopathology; D011108:Polymers / Q000627:therapeutic use; D012138:Respiratory Therapy; D012965:Sodium Chloride / Q000627:therapeutic use*; D013147:Spirometry; D013183:Sputum / Q000378:metabolism*; D013464:Sulfuric Acids / Q000627:therapeutic use; D013501:Surface-Active Agents / Q000627:therapeutic use*; D007507:Therapeutic Irrigation; D014867:Water / Q000627:therapeutic use*
chemical_list: D000336:Aerosols; D000438:Alcohols; D005100:Expectorants; D011108:Polymers; D013464:Sulfuric Acids; D013501:Surface-Active Agents; D014867:Water; D012965:Sodium Chloride