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Tussometry: an objective assessment of vocal cord function
G E Murty1, P J Kelly, P J Bradley
1Department of Otorhinolaryngology, University Hospital, Nottingham, England.
The Annals of Otology, Rhinology, and Laryngology
|October 1, 1993
Summary
Tussometry, a new objective cough analysis, accurately assesses vocal cord position. This noninvasive method provides reproducible results for evaluating laryngeal function, aiding treatment outcomes.
Area of Science:
- Laryngology and Speech Science
- Medical Engineering
- Diagnostic Techniques
Background:
- Laryngeal function alteration techniques require objective outcome measures.
- Current assessment methods for vocal cord disorders lack objectivity.
- Accurate vocal cord assessment is crucial for effective treatment planning.
Purpose of the Study:
- Introduce tussometry, a novel objective technique for assessing cough airflow patterns.
- Evaluate the efficacy of tussometry in determining vocal cord position.
- Establish tussometry's reliability and reproducibility for clinical use.
Main Methods:
- Tussometry was developed to analyze airflow patterns during coughing.
- Peak value time, a key tussometry parameter, was studied.
- Evaluated 35 cases of vocal cord palsies against a control group.
- Assessed 17 vocal cord palsies before and after augmentation procedures.
Main Results:
- Tussometry accurately assesses vocal cord position.
- The technique is independent of lung function and intraoral pressures.
- Demonstrated 0% interobserver variation, indicating high objectivity.
- Showed intrasubject variation of 3.1% to 5.7%, confirming reproducibility.
Conclusions:
- Tussometry offers a rapid, noninvasive, and inexpensive objective assessment of vocal cord function.
- This technique is suitable for the office setting.
- Tussometry can significantly improve the evaluation of laryngeal disorders and treatment efficacy.