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      Comparison of drug-induced sleep endoscopy and Müller's maneuver in diagnosing obstructive sleep apnea using the VOTE classification system Translated title: Comparação entre endoscopia com sono induzido por fármacos e manobra de Müller no diagnóstico de apneia obstrutiva do sono usando o sistema de classificação VOTE

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          Abstract

          Introduction

          Knowledge of the site of obstruction and the pattern of airway collapse is essential for determining correct surgical and medical management of patients with Obstructive Sleep Apnea Syndrome (OSAS). To this end, several diagnostic tests and procedures have been developed.

          Objective

          To determine whether drug-induced sleep endoscopy (DISE) or Müller's maneuver (MM) would be more successful at identifying the site of obstruction and the pattern of upper airway collapse in patients with OSAS.

          Methods

          The study included 63 patients (52 male and 11 female) who were diagnosed with OSAS at our clinic. Ages ranged from 30 to 66 years old and the average age was 48.5 years. All patients underwent DISE and MM and the results of these examinations were characterized according to the region/degree of obstruction as well as the VOTE classification. The results of each test were analyzed per upper airway level and compared using statistical analysis (Cohen's kappa statistic test).

          Results

          There was statistically significant concordance between the results from DISE and MM for procedures involving the anteroposterior (73%), lateral (92.1%), and concentric (74.6%) configuration of the velum. Results from the lateral part of the oropharynx were also in concordance between the tests (58.7%). Results from the lateral configuration of the epiglottis were in concordance between the tests (87.3%). There was no statistically significant concordance between the two examinations for procedures involving the anteroposterior of the tongue (23.8%) and epiglottis (42.9%).

          Conclusion

          We suggest that DISE has several advantages including safety, ease of use, and reliability, which outweigh MM in terms of the ability to diagnose sites of obstruction and the pattern of upper airway collapse. Also, MM can provide some knowledge of the pattern of pharyngeal collapse. Furthermore, we also recommend using the VOTE classification in combination with DISE.

          Resumo

          Introdução

          O conhecimento do local da obstrução e do padrão de colapso das vias respiratórias é essencial para determinar o tratamento cirúrgico e clínico corretos de pacientes com Síndrome de Apneia Obstrutiva do Sono (SAOS). Para este fim, vários testes e procedimentos de diagnóstico foram desenvolvidos.

          Objetivo

          Determinar se a Endoscopia de Sono Induzido por Fármacos (DISE) ou Manobra de Müller (MM) seria mais bem-sucedida na identificação do local de obstrução e do padrão de colapso das vias respiratórias superiores em pacientes com SAOS.

          Método

          O estudo incluiu 63 pacientes (52 do sexo masculino e 11 do sexo feminino) que foram diagnosticados com SAOS em nossa clínica. As idades variaram de 30 a 66 anos e a idade média foi de 48,5 anos. Todos os pacientes foram submetidos a DISE e MM e os resultados destes exames foram caracterizados de acordo com a região/grau de obstrução, bem como a classificação VOTE. Os resultados de cada teste foram analisados por nível das vias respiratórias superiores e comparados usando análise estatística (teste estatístico kappa de Cohen).

          Resultados

          Houve concordância estatisticamente significativa entre os resultados da DISE e MM para os procedimentos que envolvem configuração anteroposterior (73%), lateral (92,1%) e concêntrica (74,6%) do véu palatino. Os resultados da parte lateral da orofaringe também estavam em concordância entre os testes (58,7%). Os resultados da configuração lateral da epiglote estavam em concordância entre os testes (87,3%). Não houve concordância estatisticamente significativa entre os dois exames para os procedimentos que envolvem a parte anteroposterior da língua (23,8%) e epiglote (42,9%).

          Conclusão

          Sugere-se que a DISE apresenta várias vantagens, como segurança, facilidade de uso e confiabilidade, que superam a MM em termos da capacidade de diagnosticar locais de obstrução e o padrão de colapso da via respiratória superior. O MM pode também fornecer algum conhecimento sobre o padrão de colapso da faringe. Além disso, recomendamos o uso da classificação VOTE em combinação com DISE.

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          Most cited references26

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          Drug-induced sleep endoscopy: the VOTE classification.

          The surgical evaluation of obstructive sleep apnea is designed to characterize the pattern of upper airway obstruction in order to develop an effective treatment plan for an individual patient. Drug-induced sleep endoscopy (DISE) is one evaluation technique that involves assessment of individuals under pharmacologic sedation designed to simulate natural sleep, utilizing fiberoptic endoscopy to examine the upper airway. Developed in multiple centers throughout Europe, DISE was first described in 1991 and is performed widely around the world. Although multiple studies support a potential role for DISE in evaluation for treatment with surgery and mandibular repositioning appliances, important clinical questions remain unanswered. A major limitation in advancing our understanding of drug-induced sleep endoscopy has been the multiplicity and, in many cases, the complexity of classification systems that prevent the comparison of results across the studies and centers. We present the VOTE classification, a method for characterizing DISE findings that focuses on its core feature, the specific structures that contribute to obstruction.
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            Sleep nasendoscopy: a technique of assessment in snoring and obstructive sleep apnoea.

            It appears that uvulopalatopharyngoplasty (UVPP) is a reliable procedure for reducing snoring, but much less reliable when used as a treatment for OSAS. This is thought to be because of poor patient selection in that the site of the problem is not always the site of the operation. We present the technique of sleep nasendoscopy which allows direct visualization of the site or sites of obstruction in a sleeping patient. Our study has shown that there are patients with obstructive sleep apnoea syndrome (OSAS) in whom the only site of pharyngeal obstruction is at the velopharynx. These patients should do well with the relatively simple procedure of UVPP. This is not true for many other OSAS patients in whom we found that obstruction was multisegmental. This helps to explain the frequently poor results of UVPP in OSAS patients. We feel that this form of preoperative assessment will avoid unnecessary surgery.
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              Clinical staging for sleep-disordered breathing.

              The purpose of this study was to identify prognostic indicators that would lead to stratification of patients likely to have successful surgery for sleep-disordered breathing (SDB) versus those destined to fail. We retrospectively reviewed 134 patients to correlate palate position and tonsil size to the success of the UPPP as based on postoperative polysomnography results. Similar to our previously published data on the Friedman Score as a predictor of the presence and severity of SDB, the palate position was determined on physical examination of the oral cavity and was graded for each patient. This grade combined with tonsil size was used to stage the patients. Stage I was defined as having palate position 1 or 2 combined with tonsil size 3 or 4. Stage II was defined as having palate position 3 or 4 and tonsil size 3 or 4. Stage III patients had palate position 3 or 4 and tonsil size 0, 1, or 2. Any patient with body mass index of greater than 40 was placed in the stage III group. The results of uvulopalatopharyngoplasty (UPPP) were then graded as success or failure and success rates were compared by stage. Academically affiliated tertiary care referral center. Stage I patients who underwent UPPP had a success rate of 80.6%, stage II patients had a success rate of 37.9%, and stage III patients had a success rate of 8.1%. A clinical staging system for SDB based on palate position, tonsil size, and body mass index is presented. It appears to be a valuable predictor of the success of UPPP. Additional studies and wider use of the staging system will ultimately define its role in the treatment of SDB.
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                Author and article information

                Contributors
                Journal
                Braz J Otorhinolaryngol
                Braz J Otorhinolaryngol
                Brazilian Journal of Otorhinolaryngology
                Elsevier
                1808-8694
                1808-8686
                20 June 2016
                Jul-Aug 2017
                20 June 2016
                : 83
                : 4
                : 445-450
                Affiliations
                [0005]Bakırköy Dr. Sadi Konuk Training and Research Hospital, Department of Otorhinolaryngology – Head and Neck Surgery, Istanbul, Turkey
                Author notes
                [* ]Corresponding author. dr.mcelik@ 123456yahoo.com
                Article
                S1808-8694(16)30114-8
                10.1016/j.bjorl.2016.05.009
                9442692
                27388956
                163b9ab8-ddfc-42f1-9ff9-13e7e4679f38
                © 2016 Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial. Published by Elsevier Editora Ltda.

                This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

                History
                : 3 November 2015
                : 24 May 2016
                Categories
                Original Article

                obstructive sleep apnea,müller's maneuver,drug-induced sleep endoscopy,vote classification,apneia obstrutiva do sono,manobra de müller,endoscopia com sono induzido por fármacos,classificação vote

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