title: New unidirectional airflow ball tracheostomy speaking valve.
authors.affiliation: Division of Otolaryngology-Head and Neck Surgery, The Good Samaritan Hospital, Baltimore, MD 21239, USA.
authors.forename: A H
authors.initials: AH
authors.lastname: Shikani
authors.forename: J
authors.initials: J
authors.lastname: French
authors.forename: A A
authors.initials: AA
authors.lastname: Siebens
mesh_terms: D004867:Equipment Design; D006801:Humans; D012123:Pulmonary Ventilation / Q000502:physiology*; D013065:Speech Intelligibility / Q000502:physiology*; D014139:Tracheostomy / Q000295:instrumentation*