Abstract:
PURPOSE:Tracheostomy speaking valve use may increase airflow resistance and work of breathing. It remains unclear which valve offers the best performance characteristics. We compared the performance characteristics of the Shikani speaking valve (SSV; unidirectional-flow ball valve) with those of the Passy-Muir valve (PMV; bias-closed flapper valve). METHOD:Airflow resistance was measured for both the SSV and the PMV at 8 flow amplitudes and in 3 orientations (-15°, 0°, +20°) in the bias-open and bias-closed configurations. RESULTS:Significantly lower airflow resistance was observed for the SSV (bias open) compared with the PMV at -15° (p < .001), 0° (p < .001), and +20° (p = .006) from the horizon. No significant difference was observed between the PMV and the SSV (bias-closed) configuration at any of the tested angles. A nonsignificant trend toward decreased airflow resistance was observed between the SSV bias-open and bias-closed configurations at each of the angles tested. CONCLUSIONS:The SSV demonstrated lower airflow resistance compared with the PMV across 8 flow amplitudes in the bias-open configuration at -15°, 0°, and +20° from the horizon. Further investigation is needed to determine the clinical impact of these findings on patient comfort, work of breathing, phonation, and airway protection during swallowing.
journal_name
Am J Speech Lang Patholjournal_title
American journal of speech-language pathologyauthors
Shikani AH,Miller AC,Elamin EMdoi
10.1044/2015_AJSLP-14-0115subject
Has Abstractpub_date
2015-11-01 00:00:00pages
733-8issue
4eissn
1058-0360issn
1558-9110pii
2389850journal_volume
24pub_type
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