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