| In vitro evaluation of the iValve: a novel hands-free speech valve. | |
| | |
MedLine Citation:
|
PMID: 22279953 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
|
OBJECTIVES: We performed in vitro evaluation of a novel, disposable, automatic hands-free tracheostoma speech valve for laryngectomy patients based upon the principle of inhalation. The commercially available automatic speech valves close upon strong exhalation and open again when the pressure drops. This method makes long sentences or pauses difficult. The novel iValve is designed to allow almost natural speech, with mid-sentence pausing and whispering. METHODS: The inhalation closing flows and exhalation opening pressures of 6 iValve prototype versions at different settings were compared with physiological values. The airflow resistance at inhalation was compared to physiological values and to commercial valve values. RESULTS: The iValve prototypes showed flow and pressure ranges in concordance with the physiological values in the literature. The airflow resistance in the breathing mode was within the physiological airflow resistance range, yet above the values from the two commercial valves. The resistance in the speaking mode was above the physiological airflow resistance range. CONCLUSIONS: In vitro tests show that the iValve versions can be selected and adjusted to operate within the physiological range. The airflow resistance in the breathing mode is good. In speaking mode, inhalation should, and can, be decreased. The iValve should offer the patient a more intuitively useable alternative with more dynamic speech. Its low cost allows disposability and wider use. |
| | |
Authors:
|
Eduard B van der Houwen; Tjouwke A van Kalkeren; Johannes G M Burgerhof; Bernard F A M van der Laan; Gijsbertus J Verkerke |
Related Documents
:
|
2729893 - Family resemblance in blood pressure measurements. 18172453 - The relationship between gestational age, systolic blood pressure and pulse pressure in... 12362413 - Magnetic stimulation of sacral roots for assessing the efferent neuronal pathways of lo... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: The Annals of otology, rhinology, and laryngology Volume: 120 ISSN: 0003-4894 ISO Abbreviation: Ann. Otol. Rhinol. Laryngol. Publication Date: 2011 Dec |
Date Detail:
|
Created Date: 2012-01-27 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0407300 Medline TA: Ann Otol Rhinol Laryngol Country: United States |
Other Details:
|
Languages: eng Pagination: 814-9 Citation Subset: AIM; IM |
Affiliation:
|
Department of Biomedical Engineering, University Medical Center Groningen, University of Groningen, Groningen, athe Netherlands. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Prediction of vestibular schwannoma growth: a novel rule based on clinical symptomatology.
Next Document: Expression of ABC transporters is an unfavorable prognostic factor in laryngeal squamous cell carcin...