My index to Passy-Muir web-site

PassyMuir youtube channel
Intro playlist 12 videos Last updated on Jan 5, 2012

1985 http://www.passy-muir.com/thecorner  David A. Muir and Patricia E. Passy introduced the Passy-Muir Speaking Valve to the medical community

http://www.passy-muir.com/what_is
Time
Expedites Weaning: reestablishes physiologic PEEP and respiratory muscle retraining
Reduces Decannulation Time: exhale via upper airway ; physician to assess for airway patency

Airflow
Improves Oxygenation: closed respiratory system. Positive End Expiratory Pressure (PEEP) 
Improves Olfaction: airflow through the oral/nasal cavities during exhalation.

Liquid flow
Facilitates Secretion Management: The Passy-Muir Valve design improves swallowing and facilitates a stronger, more effective cough with oral expectoration of secretions. Evaporation of secretions occurs due to redirection of air through the upper airway during exhalation. May reduce suctioning needs and associated costs by restoring function of the bronchial hygiene system.
Facilitates Infection Control: The Passy-Muir Valve  - no hands + oral expectoration

Interchangeability Between Tracheostomy and Ventilator Use

http://www.passy-muir.com/speech_therapy 

A patient at Madonna Rehabilitation Hospital does speech therapy using the Passy-Muir Valve (5:27, Published on Jan 7, 2014)