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Pokharel A, Naina P, Sebastain S, Syed KA, John M, Varghese AM. Normative nasalance scores in Tamil-speaking Indian children. LOGOP PHONIATR VOCO 2020; 47:43-48. [PMID: 33269640 DOI: 10.1080/14015439.2020.1849391] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
OBJECTIVE The aim of this study was to obtain normative nasalance scores for Indian Tamil-speaking children. METHODS Mean nasalance scores were obtained from 175 consecutive Tamil-speaking normal children (95 males, 80 females) aged 5-16 years during the repetition of six standardized sentences: two oral, two oronasal, and two nasal sentences. The nasal view was used to obtain nasalance scores for the standardized sentences. RESULTS Group mean and standard deviation (SD) nasalance scores of children for oral, oronasal, and nasal sentence were 35.65(SD 7.20), 44.42(SD 7.37), and 57.21(SD 8.15), respectively. The mean nasalance values of children aged 9-12 years were greater than children aged 5-8 years and 13-16 years for nasal sentences (p < .001). Males were found to have significantly higher nasalance scores for oral and oronasal sentences (p < .05) although these differences were within the range of normal variation. CONCLUSIONS The present study provides normative nasalance scores for Tamil-speaking Indian children.
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Affiliation(s)
- Apar Pokharel
- Department of ENT, Christian Medical College, Vellore, India
| | - P Naina
- Department of ENT, Christian Medical College, Vellore, India
| | | | | | - Mary John
- Department of ENT, Christian Medical College, Vellore, India
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Lin WY, Chang WD, Ko LW, Tsou YA, Chen SH. Impact of patient-related factors on successful autologous fat injection laryngoplasty in thyroid surgical treated related unilateral vocal fold paralysis- observational study. Medicine (Baltimore) 2020; 99:e18579. [PMID: 31895805 PMCID: PMC6946487 DOI: 10.1097/md.0000000000018579] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
The aim of this study was to compare major voice indicators in different sub-categories, the outcome of lipoinjection for patients might be refined and some voice prognostic factors could be more particularized in specific sub-groups. This is an observational study, and sub-grouped UVFP patients into 3 categories: male vs female, BMI ≥ 24 vs BMI < 24, Age ≥ 60 vs Age < 60 for more detailed exploring whether sub-categories affected voice diagnostic and prognostic parameters. Patients' voice data is recorded before and after the autologous fat injection laryngoplasty by a multidimensional voice program. Overall, 73 patients' voice performance were improved 12 months later by vocal fold lipoinjection. In the comparison of the male with female revealed female obtained better Jita than male by surgery (Female: 174.50 ± 100.58 Hz; Male: 294.82 ± 253.65 Hz; P < .05). BMI ≥ 24 vs BMI < 24 showed no statistical difference. Patients aged under 60 demonstrated better Highest F0, lowest F0, NHR and ShdB than elder ones 12 months after receiving vocal fold lipoinjection. Thus, Noise-to-harmonics ratio (NHR), voice turbulence index (VTI), and ShdB (Absolute shimmer, dB) may be the major post-operative evaluating markers of patients' age under 60. Voice parameters showed no significant correlation with BMI. Female patients performed lower Jita (Absolute jitter, μsec) than male patients 1 year after receiving treatment. The experimental results in this study showed UVFP patients' gender and age may stand as significant categories on analyzing clinical voice prognostic indicators, ShdB and Jita of autologous injection laryngoplasty.
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Affiliation(s)
- Wen-Yang Lin
- Department of Biological Science and Technology, National Chiao Tung University
| | - Wen-Dien Chang
- Department of Sport Performance, National Taiwan University of Sport
| | - Li-Wei Ko
- Institute of Bioinformatics and Systems Biology, Department of Biological Science and Technology. Center for Intelligent Drug Systems and Smart Bio-devices, National Chiao Tung University
| | - Yung-An Tsou
- Department of Otolaryngology-Head and Neck Surgery, China Medical University Hospital; Department of Audiology and Speech-Language Pathology, Asia University
| | - Sheng-Hwa Chen
- Department of Audiology and Speech Pathology, Asia University, Taiwan ROC
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Srinivas V, Bressmann T. Effects of Knowledge of Task on Control of Oral-Nasal Balance in Speech. Folia Phoniatr Logop 2019; 73:15-21. [DOI: 10.1159/000503861] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 10/01/2019] [Indexed: 11/19/2022] Open
Abstract
<b><i>Introduction:</i></b> Previous research has shown that altering the nasal signal level auditory feedback changed the control of oral-nasal balance in normal speakers. The present study investigated whether knowledge of the task and the instruction not to compensate would change the participants’ response to the manipulation. <b><i>Methods:</i></b> Twenty participants (10 females) in 2 groups continuously repeated a sentence while their nasal signal level was increased or decreased and fed back to them via headphones, so the speakers heard themselves as more or less nasal, respectively. After the first recording session, participants were debriefed about the true nature of the experiment. They were instructed not to compensate in the second recording session. The outcome measures were the percentage changes of nasalance scores from the first baseline. <b><i>Results:</i></b> Statistical analysis using a repeated measures analysis of variance showed an effect of the nasal signal level, <i>F</i>(5,80) = 2.51, <i>p</i> = 0.049, and a nasal signal level by knowledge of task interaction effect, <i>F</i>(5,80) = 3.25, <i>p</i> = 0.019. Post hoc tests showed that the maximum nasal signal level auditory feedback resulted in a significant decrease of nasality from the initial baseline. <b><i>Conclusion:</i></b> Despite knowledge of the task, speakers were unable to resist compensating. As found in previous research, there was a numerically higher compensation response at the maximum than at the minimum nasal signal level auditory feedback condition.
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Bettens K, de Boer G, Bressmann T, Bruneel L, Van Lierde K. Clinical Application of a New Approach to Identify Oral-Nasal Balance Disorders Based on Nasalance Scores. Cleft Palate Craniofac J 2018; 56:628-638. [PMID: 30134743 DOI: 10.1177/1055665618796012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE A new approach to classify oral-nasal balance disorders based on instrumental measurements was developed based on linear discriminant analysis (LDA) of nasalance scores of simulated oral-nasal balance disorders by de Boer and Bressmann. The current study aimed to apply the newly developed functions to clinical data to investigate the applicability of this new approach. DESIGN Retrospective diagnostic accuracy study. SETTING Tertiary university hospital. PARTICIPANTS Fifty-five Dutch-speaking Flemish children (age 4-12 years) with normal (n = 20), hypernasal (n = 18), hyponasal (n = 12), or mixed nasality (n = 5). INTERVENTIONS Nasalance scores of an oral and a nasal text were used to calculate 3 sets of LDA function scores. Predicted classification was consecutively based on the function values of the group centroids originally determined by de Boer and Bressmann and adapted LDA functions and group centroids based on clinical data. MAIN OUTCOME MEASURES Discriminatory power of the linear discriminant formulas. RESULTS Based on the original LDA functions, 56% of the speech samples matched the perceptual classification. Applying a correction factor for age and language differences resulted in a 67% correct classification, although 83% of the hyponasal samples were ranked as "normal resonance." Rederivation of the LDA functions based on current clinical data resulted in an 80% correct classification. CONCLUSIONS The new approach of classifying oral-nasal balance disorders based on a combination of nasalance scores was promising. However, further clinical research is needed to refine the LDA functions and group centroids before clinical application is possible.
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Affiliation(s)
- Kim Bettens
- 1 Department of Speech, Language and Hearing Sciences, Ghent University, Ghent, Belgium
| | - Gillian de Boer
- 2 Department of Speech-Language Pathology, University of Toronto, Toronto, Ontario, Canada
| | - Tim Bressmann
- 2 Department of Speech-Language Pathology, University of Toronto, Toronto, Ontario, Canada
| | - Laura Bruneel
- 1 Department of Speech, Language and Hearing Sciences, Ghent University, Ghent, Belgium
| | - Kristiane Van Lierde
- 1 Department of Speech, Language and Hearing Sciences, Ghent University, Ghent, Belgium.,3 Department of Speech-Language Therapy and Audiology, University of Pretoria, Pretoria, South Africa
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Maturo DS, Pirola MNDCP, Ricz LNA, Trawitzki LVV. Nasalance of Brazilian Portuguese-speaking populations from two different states. Codas 2017; 29:e20160041. [PMID: 28327782 DOI: 10.1590/2317-1782/20172016041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Accepted: 09/06/2016] [Indexed: 11/21/2022] Open
Abstract
Purpose To measure the nasalance scores of Brazilian Portuguese-speaking young adults from the states of Sao Paulo and Minas Gerais in order to investigate whether dialect variations and gender affect these scores. Methods Nasalance was assessed in 36 individuals: 20 native residents of Sao Paulo state (mean age=23 y.o.) and 16 native residents of Minas Gerais state (mean age=24 y.o.), following the same criteria. Nasalance measures were taken using the Nasometer II 6400 (KayPentax) device based on the reading of three texts (nasal-1, nasal-2, and oral). Intergroup nasalance scores were compared using the unpaired Student's t test considering two experimental groups. Results The nasalance scores in individuals from the states of Sao Paulo and Minas Gerais were 52.7% and 48.8% for the nasal-1 text, 49.6% and 49.9% for the nasal-2 text, and 14.3% and 9.8% for the oral text, respectively. Statistical analysis comparing the mean nasalance scores in both groups showed significant difference (p=0.03) only for the oral text, in which individuals from Sao Paulo state presented higher scores. Conclusion Although nasalance scores were lower in individuals from Minas Gerais state compared with those of individuals from Sao Paulo state, both groups presented values within the normal range. The variable gender was not relevant in the nasalance assessment; however, a tendency for higher scores was observed in women compared with men from Minas Gerais state in the same group in the reading of the nasal-2 text. This study contributes to the knowledge of nasalance reference scores for two different populations of Brazilian Portuguese speakers; however, the results herein reported should be interpreted with caution due to the small study sample size.
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Oliveira DND, Sampaio-Teixeira ACM, Alvarenga BG, Fukushiro AP, Yamashita RP, Trindade IEK. Escores de nasalância de falantes do Português Brasileiro aos cinco anos de idade. Codas 2017; 29:e20160197. [DOI: 10.1590/2317-1782/20172016197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 01/24/2017] [Indexed: 11/22/2022] Open
Abstract
RESUMO Objetivo Determinar valores de nasalância de crianças falantes do Português Brasileiro sem alterações na produção da fala, atraso de linguagem e deformidades dentofaciais evidentes, aos 5 anos de idade, e verificar as diferenças entre tipos de emissão e entre gêneros. Método A nasalância foi determinada em 20 crianças, 11 do gênero masculino e idade entre 4 anos e 10 meses e 5 anos e 11 meses, utilizando um nasômetro II 6450 (KayPENTAX), na produção de oito sílabas tipo consoante-vogal e uma sequência de nove vocábulos. A significância das diferenças entre os tipos de emissões foi verificada pelo Teste de Tukey e, entre os gêneros, pelo teste de Mann-Whitney, para um nível de 5%. Resultados Os valores médios de nasalância foram os seguintes: /pa/= 10±4%, /pi/= 22±7%, /sa/= 11±5%, /si/= 24±11%, /ma/= 57±11%, /mi/= 73±13%, /la/= 14±9%, /li/= 25±11%, vocábulos (pipa, bis, burro, tatu, pilha, cuca, gui, fila, luz)= 20±6%. Na maioria das comparações, os valores de nasalância das sílabas nasais foram significantemente maiores do que os das sílabas orais (com vogal alta ou neutra) e os valores das sílabas orais com vogal alta foram significativamente maiores que os das sílabas orais com vogal neutra. Não houve diferença significante entre os gêneros. Conclusão Foram definidos valores normais de nasalância de crianças falantes do Português Brasileiro, de 5 anos de idade, sendo que a metodologia empregada pode servir de padrão para o diagnóstico precoce de desvios de nasalidade, como a hipernasalidade observada na fala de crianças com fissura palatina.
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Bettens K, Wuyts FL, Jonckheere L, Platbrood S, Van Lierde K. Influence of gender and age on the Nasality Severity Index 2.0 in Dutch-speaking Flemish children and adults. LOGOP PHONIATR VOCO 2016; 42:133-140. [PMID: 27841710 DOI: 10.1080/14015439.2016.1245781] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
This study aimed to explore the influence of gender and age on the Nasality Severity Index 2.0 (NSI 2.0), an instrumental multiparametric index to determine hypernasality. Additionally, reference values will be established for this new index. Influence of gender and age on the NSI 2.0 was explored in 80 Flemish-speaking children (4-12 years; 40 boys, 40 girls) and 60 Flemish-speaking adults (18-60 years, 30 men, 30 women) without resonance disorders by determining its incorporated acoustic parameters: nasalance of the vowel/u/and an oral text, determined by a Nasometer, and voice low tone to high tone ratio (VLHR) of the vowel/i/. The equation yields NSI 2.0 = 13.20 - (0.0824 × nasalance/u/(%)) - (0.26 × nasalance oral text (%)) - (0.242 × VLHR/i/4.47*F0 Hz (dB)). No effect of gender or age was found on the NSI 2.0 in children. However, significant differences were found for the NSI 2.0, nasalance of/u/and an oral text between adult men and women. Additionally, an interaction effect between gender and age was found for these parameters. Consequently, separate reference values for the NSI 2.0 in children, adult men and adult women were established. Based on these reference scores, deviation of the NSI 2.0 score in patients with resonance disorders can be defined, which can determine the need for (additional) intervention. Further research can explore the possible influence of language on the index.
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Affiliation(s)
- Kim Bettens
- a Department of Speech, Language and Hearing Sciences , Ghent University , Ghent , Belgium
| | - Floris L Wuyts
- a Department of Speech, Language and Hearing Sciences , Ghent University , Ghent , Belgium.,b Department of Biomedical Physics , University of Antwerp , Antwerp , Belgium
| | - Lisa Jonckheere
- a Department of Speech, Language and Hearing Sciences , Ghent University , Ghent , Belgium
| | - Shanah Platbrood
- a Department of Speech, Language and Hearing Sciences , Ghent University , Ghent , Belgium
| | - Kristiane Van Lierde
- a Department of Speech, Language and Hearing Sciences , Ghent University , Ghent , Belgium.,c Department of Speech-Language Pathology and Audiology , University of Pretoria , Pretoria , South Africa
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Bettens K, Wuyts FL, D'haeseleer E, Luyten A, Meerschman I, Van Crayelynghe C, Van Lierde KM. Short-term and long-term test-retest reliability of the Nasality Severity Index 2.0. JOURNAL OF COMMUNICATION DISORDERS 2016; 62:1-11. [PMID: 27175827 DOI: 10.1016/j.jcomdis.2016.05.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 12/18/2015] [Accepted: 05/01/2016] [Indexed: 06/05/2023]
Abstract
PURPOSE The Nasality Severity Index 2.0 (NSI 2.0) forms a new, multiparametric approach in the assessment of hypernasality. To enable clinical implementation of this index, the short- and long-term test-retest reliability of this index was explored. METHODS In 40 normal-speaking adults (mean age 32y, SD 11, 18-56y) and 29 normal-speaking children (mean age 8y, SD 2, 4-12y), the acoustic parameters included in the NSI 2.0 (i.e. nasalance of the vowel /u/ and an oral text, and the voice low tone to high tone ratio (VLHR) of the vowel /i/) were obtained twice at the same test moment and during a second assessment two weeks later. After determination of the NSI 2.0, a comprehensive set of statistical measures was applied to determine its reliability. RESULTS Long-term variability of the NSI 2.0 and its parameters was slightly higher compared to the short-term variability, both in adults and in children. Overall, a difference of 2.82 for adults and 2.68 for children between the results of two consecutive measurements can be interpreted as a genuine change. With an ICC of 0.84 in adults and 0.77 in children, the NSI 2.0 additionally shows an excellent relative consistency. No statistically significant difference was withheld in the reliability of test-retest measurements between adults and children. CONCLUSION Reliable test-retest measurements of the NSI 2.0 can be performed. Consequently, the NSI 2.0 can be applied in clinical practice, in which successive NSI 2.0 scores can be reliably compared and interpreted. LEARNING OUTCOMES The reader will be able to describe and discuss both the short-term and long-term test-retest reliability of the Nasality Severity Index 2.0, a new multiparametric approach to hypernasality, and its parameters. Based on this information, the NSI 2.0 can be applied in clinical practice, in which successive NSI 2.0 scores, e.g. before and after surgery or speech therapy, can be compared and interpreted.
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Affiliation(s)
- Kim Bettens
- Department of Speech, Language and Hearing Sciences, Ghent University, Ghent, Belgium.
| | - Floris L Wuyts
- Department of Speech, Language and Hearing Sciences, Ghent University, Ghent, Belgium; Biomedical Physics, University of Antwerp, Antwerp, Belgium
| | - Evelien D'haeseleer
- Department of Speech, Language and Hearing Sciences, Ghent University, Ghent, Belgium
| | - Anke Luyten
- Department of Speech, Language and Hearing Sciences, Ghent University, Ghent, Belgium
| | - Iris Meerschman
- Department of Speech, Language and Hearing Sciences, Ghent University, Ghent, Belgium
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Bettens K, Van Lierde KM, Corthals P, Luyten A, Wuyts FL. The Nasality Severity Index 2.0: Revision of an Objective Multiparametric Approach to Hypernasality. Cleft Palate Craniofac J 2015; 53:e60-70. [PMID: 25794017 DOI: 10.1597/14-247] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE Due to the multidimensional nature of resonance disorders, multivariate diagnostic assessment is advisable. The nasality severity index (NSI) is based on this point of view. Because of the influence of personal and environmental variables on the current NSI, this study aims to refine this index. DESIGN Prospective case-control study. SETTING Tertiary university hospital. PATIENTS Forty-two patients with cleft lip and palate and 50 children without resonance disorders were tested. INTERVENTIONS Resonance was investigated by perceptual as well as objective measurements. A Nasometer was used to score nasalance, and spectral speech characteristics of a sustained sound /i:/ were determined, among which the voice low tone to high tone ratio (VLHR). Binary logistic regression analysis was performed to calculate the optimal index to discriminate patients from control children. Additionally, the validity of the index was determined based on data from an independent patient and control group. RESULTS The NSI 2.0, a weighted linear combination of three variables, can be obtained using the equation NSI 2.0 = 13.20 - (.0824 × nasalance /u:/ [%]) - (.260 × nasalance oral text [%]) - (.242 × VLHR 4.47*F0 [dB]). The NSI has a sensitivity of 92% and a specificity of 100%. Moreover, it has excellent validity (sensitivity 88%, specificity 89%). CONCLUSIONS The NSI 2.0 discriminates patients from control children with high sensitivity, specificity, and validity. This multiparametric method can offer a more powerful approach in the assessment and treatment planning of individuals with hypernasality.
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Awan SN, Bressmann T, Poburka B, Roy N, Sharp H, Watts C. Dialectical effects on nasalance: a multicenter, cross-continental study. JOURNAL OF SPEECH, LANGUAGE, AND HEARING RESEARCH : JSLHR 2015; 58:69-77. [PMID: 25260176 DOI: 10.1044/2014_jslhr-s-14-0077] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Accepted: 09/08/2014] [Indexed: 06/03/2023]
Abstract
PURPOSE This study investigated nasalance in speakers from six different dialectal regions across North America using recent versions of the Nasometer. It was hypothesized that many of the sound changes observed in regional dialects of North American English would have a significant impact on measures of nasalance. METHOD Samples of the Zoo Passage, the Rainbow Passage, and the Nasal Sentences were collected from young adult male and female speakers (N=300) from six North American dialectical regions (Midland/Mid-Atlantic; Inland North Canada; Inland North; North Central; South; and Western dialects). RESULTS Across the three passage types, effect sizes for dialect were moderate in strength and accounted for approximately 7%-9% of the variation in nasalance. Increased differences in nasalance tended to occur between speakers from distinctly different geographical regions, with the highest nasalance across all passages observed for speakers from the Texas South dialect region. CONCLUSION Clinicians and researchers who use perceptual and instrumental measures of speech production should be aware that dialectical and socially acquired speech patterns may influence the acoustic characteristics of speech and may also influence the interpretation of normative expectations and typical versus disordered cutoff scores for instruments such as the Nasometer.
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Zagólski O, Stręk P, Gajda M. Adult tonsillectomy: anatomical differences affect postoperative transient hypernasality. Folia Phoniatr Logop 2014; 66:95-9. [PMID: 25377515 DOI: 10.1159/000365921] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE Our purpose was to determine how anatomical conditions of the throat influence the degree and duration of posttonsillectomy transient hypernasality. PATIENTS AND METHODS A total of 82 tonsillectomies were performed. The participants were divided into groups: 1 – small tonsils, high soft palate position; 4 – large tonsils, low soft palate position, and 2 and 3 – intermediate tonsil dimensions and soft palate positions. Variables studied included the diameter of vapor (DV) on the mirror positioned under the patient's nose while articulating nasal sentences before and after surgery, the distance from the uvular tip to the posterior pharyngeal wall, healing grading as well as the degree and duration of hypernasality. RESULTS The mean hypernasality after tonsillectomy was greatest in group 4 and lowest in group 2. Before tonsillectomy, the mean DV was largest in group 2 and smallest in group 4. After tonsillectomy, the mean DV was largest in group 4 and smallest in group 3. Overall, the mean DV was significantly greater after tonsillectomy compared to the value before surgery. CONCLUSION The degree of hypernasality after tonsillectomy depends on the soft palate position in relation to the tongue base and the size of the tonsils. Hypernasality is greatest in patients with large tonsils and a low soft palate position in relation to the tongue base.
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Affiliation(s)
- Olaf Zagólski
- ENT Day Surgery Department, St. John Grande's Hospital, Kraków, Poland
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Bettens K, Wuyts FL, Van Lierde KM. Instrumental assessment of velopharyngeal function and resonance: a review. JOURNAL OF COMMUNICATION DISORDERS 2014; 52:170-183. [PMID: 24909583 DOI: 10.1016/j.jcomdis.2014.05.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 04/14/2014] [Accepted: 05/16/2014] [Indexed: 06/03/2023]
Abstract
UNLABELLED The purpose of this literature review is to describe and discuss instrumental assessment techniques of the velopharyngeal function in order to diagnose velopharyngeal disorders and resonance characteristics. Both direct and indirect assessment techniques are addressed, in which successively nasopharyngoscopy, videofluoroscopy, magnetic resonance imaging (MRI), cephalometric radiographic analysis, computed tomography (CT), ultrasound, acoustic and aerodynamic measurements are considered. Despite the multiple instrumental assessments available to detect and define velopharyngeal dysfunction, the ideal technique is not yet accessible. Therefore, a combination of different quantitative parameters can possibly form a solution for a more reliable determination of resonance disorders. These multi-dimensional approaches will be described and discussed. The combination of quantitative measurement techniques and perceptual evaluation of nasality will probably remain necessary to provide sufficient information to make appropriate decisions concerning the diagnosis and treatment of resonance disorders. LEARNING OUTCOMES The reader will be able to describe and discuss currently available instrumental techniques to assess the velopharyngeal mechanism and its functioning in order to diagnose velopharyngeal disorders. Additionally, he will be able to explain the possible advantages of the combination of several types of complementary measurement techniques.
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Affiliation(s)
- Kim Bettens
- Department of Speech, Language and Hearing Sciences, Ghent University, Ghent, Belgium.
| | - Floris L Wuyts
- Department of Speech, Language and Hearing Sciences, Ghent University, Ghent, Belgium; Biomedical Physics, University of Antwerp, Antwerp, Belgium
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