Shikani, A H <br/><br/>
New unidirectional airflow ball tracheostomy speaking valve.  [electronic resource] 

 -  Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery  Jul 2000 
 - 103-7 p.  digital 
<br/><br/> Publication Type: Comparative Study; Journal Article 
<br/><br/><label>ISSN: </label>0194-5998 
<br/><br/><label>Standard No.: </label>10.1067/mhn.2000.101576  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Equipment Design<br/>Humans<br/>Pulmonary Ventilation--physiology<br/>Speech Intelligibility--physiology<br/>Tracheostomy--instrumentation