speaking valve

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Tracheostomy TubesDiscussion
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Respiratory Care June 2014, 59 (6) 956-973; DOI: https://doi.org/10.4187/respcare.02920
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Facilitating Speech in the Patient With a Tracheostomy
Dean R Hess

Respiratory Care April 2005, 50 (4) 519-525;
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Tracheostomy Decannulation
Heidi H O'Connor and Alexander C White

Respiratory Care August 2010, 55 (8) 1076-1081;