Journal article
Differentiating Between Adductor and Abductor Spasmodic Dysphonia Using Airflow Interruption
The Laryngoscope, Vol.119(9), pp.1851-1855
09/01/2009
DOI: 10.1002/lary.20572
PMCID: PMC2770801
PMID: 19554636
Abstract
Objectives/Hypothesis: To measure the laryngeal resistance (R-L), subglottal pressure (P-S), and mean flow rate (MFR) of adductor (ADSD) and abductor (ABSD) spasmodic dysphonia patients using the airflow interrupter.
Methods: The R-L of six ABSD and seven ADSD patients was measured using the airflow interrupter, a noninvasive device designed to measure MFR and P-S via mechanical balloon valve interruption. Subjects performed 10 trials at each of two intensity levels, with each trial consisting of a sustained /a/ during which phonation was interrupted for 500 ms. Laryngeal resistance was calculated as subglottal pressure divided by airflow.
Results: Mean RL for the ADSD and ABSD subtypes at 65 dB were 24.78 cmH(2)O/L/s and 14.51 cmH(2)O/L/s, respectively (P = .04). Mean R-L at 70 dB were 40.02 cmH(2)O/L/s and 15.84 cmH(2)O/L/s (P = .014). P-S for the ADSD and ABSD subtypes at 65 dB were 10.23 cmH(2)O and 8.32 cmH(2)O, respectively (P = .582). At the 70 dB level, P-S were 12.39 cmH(2)O and 11.78 cmH(2)O (P = .886). MFR for the ADSD and ABSD subtypes at 65 dB were 435 mL/s and 746 mL/s (P = .205). Mean MFR at 70 dB were 518 mL/s and 848 mL/s (P = .198).
Conclusions: Noninvasive measurements of RL may be useful for differentiating between ADSD and ABSD. This simple objective test, which produces a quantitative output, could be used to evaluate laryngeal function in patients with spasmodic dysphonia.
Details
- Title: Subtitle
- Differentiating Between Adductor and Abductor Spasmodic Dysphonia Using Airflow Interruption
- Creators
- Matthew R. Hoffman - University of Wisconsin School of Medicine and Public HealthJack J. Jiang - University of Wisconsin–MadisonAdam L. Rieves - University of Wisconsin–MadisonKelsey A. B. McElveen - University of Wisconsin–MadisonCharles N. Ford - University of Wisconsin–Madison
- Resource Type
- Journal article
- Publication Details
- The Laryngoscope, Vol.119(9), pp.1851-1855
- DOI
- 10.1002/lary.20572
- PMID
- 19554636
- PMCID
- PMC2770801
- NLM abbreviation
- Laryngoscope
- ISSN
- 0023-852X
- eISSN
- 1531-4995
- Publisher
- Wiley
- Number of pages
- 5
- Grant note
- R01 DC008153; R01 DC008153-02 / NIDCD NIH HHS; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute on Deafness & Other Communication Disorders (NIDCD) R01DC008153 / NATIONAL INSTITUTE ON DEAFNESS AND OTHER COMMUNICATION DISORDERS; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute on Deafness & Other Communication Disorders (NIDCD)
- Language
- English
- Date published
- 09/01/2009
- Academic Unit
- Otolaryngology
- Record Identifier
- 9984366293502771
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