In vitro measurements of aerodynamic characteristics of an improved tracheostoma valve for laryngectomees

European Archives of Oto-rhino-laryngology : Official Journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : Affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery
A A GeertsemaG J Verkerke

Abstract

Tracheostoma valves are often required in the rehabilitation process of speech after total laryngectomy. Patients are thus able to speak without using their hands to close the tracheostoma. The improved Groningen tracheostoma valve consists of a "cough" valve with an integrated ("speech") valve, which closes for phonation. The cough valve opens as the result of pressure produced by the lungs during a cough. The speech valve closes by the airflow produced by the lungs, thus directing air from the lungs into the esophagus at a deliberately chosen moment. An experimental setup with a computer-based acquisition program was developed to measure the pressure at which the cough valve opened and the flow at which the speech valve closed. In addition, the airflow resistance coefficient of the tracheostoma valve was defined and measured with an open speech valve. Both dry air from a cylinder and humid expired air were used. Results showed a pressure range of 1-7 kPa to open the cough valve and a flow range of 1.2-2.7 l/s to close the speech valve. These values were readily attained during speech, while the flow range occurred above values reached in quiet breathing. The device appeared to function well in physiological ranges and was opt...Continue Reading

Citations

Dec 31, 2003·Biomaterials·E J O ten HallersG J Verkerke
Jan 5, 2002·The Journal of the Acoustical Society of America·M van der TornJ M Festen
May 7, 2002·The Annals of Otology, Rhinology, and Laryngology·Gijsbertus Jacob VerkerkeHarm K Schutte
Feb 28, 2002·The Annals of Otology, Rhinology, and Laryngology·Albert A GeertsemaGijsbertus J Verkerke
Jul 24, 2001·The Annals of Otology, Rhinology, and Laryngology·G J VerkerkeH K Schutte
Jan 28, 2012·The Annals of Otology, Rhinology, and Laryngology·Eduard B van der HouwenGijsbertus J Verkerke
Sep 15, 2005·Acta Oto-laryngologica·E J O Ten HallersG J Verkerke

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