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Year:
2003
| Volume: 11
| Issue: 4
| Pages: 239-242
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Original Article |
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COMPARATIVE ANALYSIS OF VOICE IN DIAGNOSTICS OF T1 AND T2 VOCAL CORD CARCINOMA
Slobodan M. MITROVIC |
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DOI:
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Abstract: |
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Background: Dysphonia is the most frequent symptom of vocal cord carcinoma. In the diagnostics of the disease subjective and objective methods of examination (acoustic analysis of a voice signal) and a laryngostroboscopy and aerodynamic examination are used.
Methods: Our clinical prospective study consisted of 40 male patients, who had malignant tumors of one vocal cord - right or left. All the patients underwent otorhinolaryngological and phoniatric examination. The quality of voice was evaluated and estimated according to the 4-level GIRBAS scale (grade-instability-roughness-breathiness-asthenic-strain). Aerodynamic analysis dealt with vital capacity (VC), maximum phonation time (MPT) and phonation quotient (PQ).
Results: Vibration of vocal cord did not exist in 60% of cases. Instability and strained voice was present in 100% of cases. Mean average value of phonation quotient was 303.33 ml/s. The influence of roughness (R), instability (I), asthenic (A), and strain (S) on the total degree of dysphonia (G), was in all cases in a significantly positive correlation with the level of statistic significance p<0.01 for I, R and S, and level p<0.05 for A. Nonvibration of a vocal cord had significant influence on the grade of dysphonia and strain (negative correlation, level p<0.01), and on the instability (negative correlation, level p<0.01). Maximum phonation time had statistically significant influence (negative correlation) on the phonation quotient.
Conclusion: The voices of all patients who had glottal carcinoma T1 and T2 were psychoacoustically characterized by strain and instability of phonation. It is certain that a patient has glottal carcinoma if he/she has values of phonation quotient higher than 300 ml/s, nonvibration of a vocal cord in laryngostroboscopy, and strained voice in psychoacoustic analysis. |
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Key words:
Voice Disorders; Speech Acoustics; Laryngeal Neoplasms; Vocal Cords |
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