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Background: Clinicians use Maximum Phonatory Time (MPT) as one of tool to verify the glottic efficiency objectively. Impairment of vocal fold mucosa integrity due to lesions results in alteration in MPT. The aim of current study was to compare MPT in young adults with vocal fold lesions and age and sex matched normal subjects.Methods: This study was conducted in the Department of ENT & Head and Neck surgery of Government Medical College Srinagar on 41 adult patients with benign vocal fold lesions and 41 healthy subjects matched for age and sex for a period of 2 years from April 2017- April 2019. The aerodynamic measure was measured as maximum phonation time in seconds and the results were analysed statistically. Both patients and controls were explained the procedure. Results: Mean MPT in seconds in males with vocal fold lesion was 14.42 seconds with SD of 5.62 seconds and in females was 10.81 seconds with SD of 3.44 seconds. Coefficients of variation (CV) was 0.35 and 0.21 respectively. In control group it was 18.15 seconds with SD of 5.88 in males and in females it was 15.72 seconds with a SD of 6.21. Mean difference between patients and controls in males and females was 3.8 and 4.9 respectively. P-Value in males and females was 0.053 and 0.003 respectively.Conclusion: Vocal cord lesions decrease MPT in both sexes even in young adults.
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Objective To observe the immediate effects of the sustained forced-blowing exercise (SFBE) on the phonation function in young healthy people. Methods 43 young healthy people were asked to pronounce a longest/a/in a comfortable situation within one breath for 3 times before and after SFBE. The sound files were analyzed with computer sound analysis system, with the parameters of mean maxi-mum phonation time (MMPT), mean frequency (MF) and mean sound pressure level (MSPL). Results The MMPT and MSPL increased (P0.05) before and after SFBE. Conclusion The SFBE can improve the MPT and MSPL of the healthy people obviously, without affections on the MF.
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@#Objective To observe the immediate effects of the sustained forced-blowing exercise (SFBE) on the phonation function in young healthy people. Methods 43 young healthy people were asked to pronounce a longest /a/ in a comfortable situation within one breath for 3 times before and after SFBE. The sound files were analyzed with computer sound analysis system, with the parameters of mean maximum phonation time (MMPT), mean frequency (MF) and mean sound pressure level (MSPL). Results The MMPT and MSPL increased (P< 0.01) after SFBE. There was no significant difference in the MF (P>0.05) before and after SFBE. Conclusion The SFBE can improve the MPT and MSPL of the healthy people obviously, without affections on the MF.
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Purpose : This study aims to measure the peak cough flow (PCF) in patients with subacute myelo-optic neuropathy (SMON) and study its relation with muscle strength, functional ability and vocal cord function. Methods : We performed a cross-sectional study in 7 patients with SMON (2 men and 5 women, mean age (SD) 81.6 (7.2) years) and in 7 age- and gender-matched patients with orthopedic problems as a control group. Their PCF, ability to walk, the Barthel Index, grip strength and maximum phonation time were assessed. Results : Mean PCF was 218.6± 66.2 L/min (110-300) for the SMON group and 267.1±76.3 L/min (170-360) for the control group (ns). The PCF was correlated with the maximum phonation time (<i>r</i> = 0.91 ; <i>p</i><0.01), but not with grip strength, the Barthel Index or the ability to walk scale. Conclusion : The PCF in patients with SMON tended to be lower compared to the control group. Therefore, evaluating PCF is suggested to be necessary to assess the risk of pneumonia.
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Pesquisas sobre o tempo máximo de fonação (TMF) em crianças obtiveram diferentes resultados, constatando que tal medida pode refletir o controle neuromuscular e aerodinâmico da produção vocal, podendo ser utilizada como indicador para outras formas de avaliação, tanto qualitativas quanto objetivas. OBJETIVO: Verificar as medidas de TMF de 23 crianças pré-escolares, com idades entre quatro e seis anos e oito meses. MATERIAL E MÉTODO: O processo de amostragem contou com questionário enviado aos pais, triagem auditiva e avaliação perceptivo-auditiva vocal, por meio da escala RASAT. A coleta de dados constou dos TMF. DESENHO DO ESTUDO: Prospectivo de corte transversal. RESULTADOS: Os TMF /a/, /s/ e /z/ médios foram 7,42s, 6,35s e 7,19s; os TMF /a/ aos seis anos, foram significativamente maiores do que aos quatro anos; à medida que a idade aumentou, todos os TMF também aumentaram; e a relação s/z para todas as idades foi próxima de um. CONCLUSÕES: Os valores de TMF mostraram-se superiores aos verificados em pesquisas nacionais e inferiores aos verificados em pesquisa internacionais. Além disso, pode-se concluir que as faixas etárias analisadas no presente estudo encontram-se num período de maturação nervosa e muscular, sendo a imaturidade mais evidente na faixa etária dos quatro anos.
Past studies on the maximum phonation time (MPT) in children have shown different results in duration. This factor may reflect the neuromuscular and aerodynamic control of phonation in patients; such control might be used as an indicator of other evaluation methods on a qualitative and quantitative basis. AIM: to verify measures of MPT and voice acoustic characteristics in 23 children aged four to six year and eight months. METHOD: The sampling process comprised a questionnaire that was sent to parents, followed by auditory screening and a voice perceptive-auditory assessment based on the R.A.S.A.T. scale. Data collection included the MPT. STUDY: a prospective and cross-sectional study. RESULTS: The MPT was 7.42s, 6.35s and 7.19s; as age increased, the MPT also increase significantly; the s/z relation at all ages was close to one. CONCLUSIONS: The results mostly agree with the medical literature.MPT values, however, were higher than in other Brazilian studies. It may be concluded that the ages that were analyzed are going through neuromuscular maturation; lack of structural maturity and neuromuscular control was more evident in chidlren aged four years.
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Child , Child, Preschool , Female , Humans , Male , Phonation/physiology , Age Factors , Cross-Sectional Studies , Prospective Studies , Reference Values , Surveys and Questionnaires , Time FactorsABSTRACT
Respiratory muscle training is one of the major methods for enhancing the vocal function. Singers who must use their voice most frequently are well aware of the importance of respiration. However, most of them do not know precisely how to exercise their abdominal respiration. Using a respiratory training device, singers are expected to gain more efficiency in their vocal enhancement. The aim of the study was to examine the pulmonary function, the maximum inspiratory pressure (MIP) and the maximum expiratory pressure (MEP), and the maximum phonation time (MPT) in five female voice-majors students after undergoing specially programmed respiratory muscle training for 2 months. All the voice-majors had an average of 4.8 years of formal classical voice training. A respiratory muscle training device (Ultrabreathe (R) ), Tangent health Care Inc., England) was used to train the respiratory muscle. None of the pulmonary function test variables had changed after respiratory muscle training. However, the MIP, MEP, and MPT were significantly increased higher after the respiratory muscle training. This suggests that the specially programmed respiratory muscle training can improve the respiratory muscle strength and vocal function without increasing the pulmonary function.