title: The changing concepts of tracheostomy.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000402:Airway Obstruction / Q000601:surgery; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D008875:Middle Aged; D009549:Nigeria; D013742:Tetanus / Q000601:surgery; D014140:Tracheotomy / Q000639:trends