Introdução: A patogênese da apneia obstrutiva do sono envolve estreitamento da faringe causado por deslocamento de líquido das pernas para o pescoço durante a noite. Objetivo: Determinar o efeito de intervenções que depletem líquido corporal na gravidade da apneia obstrutiva do sono. Métodos: Em ensaio randomizado controlado com placebo, homens diagnosticados com apneia obstrutiva do sono grave, segundo os critérios da Academia Americana de Medicina do Sono, foram aleatoriamente designados para receber diariamente diurético Lasilactona (espironolactona 100 mg + furosemida 20 mg) ou pílula placebo ou aconselhamento nutricional para dieta com restrição de sódio mais pílula placebo. O período de intervenção foi de uma semana. Todos os participantes realizaram a polissonografia portátil tipo III no início e no final do estudo. A mudança no índice de apneia hipopneia (IAH) foi o desfecho primário. Resultados: O estudo incluiu 54 participantes com média de idade (±DP) de 45±8,8 anos, IMC de 29,9±2,9 kg/m2 e IAH de 49±19 eventos/h. A mudança no IAH foi -11 eventos/h de sono (intervalo de confiança de 95% [IC], -15,59 para -5,74) no grupo de dieta, -7,33 (IC 95%, -13,75 para -0,91) no grupo diurético e 0,33 (IC 95%, -2,51 para 3,17) no grupo placebo (P=0,001 para interação tempo × grupo). A redução de água corporal total foi 2,2±2,2 L no grupo diurético (P<0,001) e 1,0±1,6 L no grupo dieta (P=0,002). Os sintomas de sonolência e a circunferência do pescoço reduziram significativamente somente no grupo dieta (P=0,007 e P<0,001 para interação, respectivamente). O uso de diurético aumentou a concentração de aldosterona e a atividade da renina plasmática (P<0,001 para interação). Conclusões: Em homens com apneia obstrutiva do sono grave, intervenções dietéticas e farmacológicas que depletam líquido corporal diminuem o IAH. Esse estudo fornece evidências de que a retenção de líquido corporal desempenha papel na patogênese da apneia do sono. / Rationale: The pathogenesis of obstructive sleep apnea involves pharyngeal narrowing caused by overnight fluid displacement from the legs to the neck. Objective: To determine the effect of interventions that reduced the body fluid content on obstructive sleep apnea severity. Methods: In this placebo-controlled study, men diagnosed with severe obstructive sleep apnea according American Academy of Sleep Medicine clinical criteria were randomized to receive daily diuretic lasilactone (spironolactone 100 mg + furosemide 20 mg) or placebo pill or nutritional counseling to sodium-restricted diet plus placebo pill. The intervention period was one week. All participants underwent out-of-center polysomnographies at baseline and follow-up. The change in apnea-hypopnea index (AHI) was the main outcome. Results: The study included 54 participants with mean age (±SD) of 45±8.8 years, body mass index of 29.9±2.9 kg/m2, and AHI of 49±19 events/h. From baseline to follow-up, the AHI delta value was −11 (95% confidence interval [CI], −15.59 to −5.74) in the diet group, −7.33 (95% CI, −13.75 to −0.91) in the diuretic group, and 0.33 (95% CI, −2.51 to 3.17) in the placebo group (P=0.001 for time × group interaction). The reduction in the total body water was 2.2±2.2 L in the diuretic group (P<0.001) and 1.0±1.6 L in the diet group (P=0.002). Sleepiness and neck circumference reduced only in the diet group (P=0.007 and P<0.001 for the interaction, respectively). The diuretic use augmented aldosterone concentration and plasma renin activity (P<0.001 for the interaction). Conclusions: Among men with severe OSA, dietary and pharmacological interventions that decrease bodily fluid content reduce the AHI. This trial provides a finding that fluid retention plays a role in apnea pathogenesis.

O escopo dete trabalho é verificar a influência de episódios agudos de hipoxemia e subsequente reoxigenação sobre marcadores inflamatórios e sobre sinalizadores de integridade da função endotelial. / The aim of this study is to verify the effect of acute hipoxemia and subsequente reoxigenation over inflammatory markers and indicators of integrity of the endothelial function.

Submitted by THIAGO DIAS FERNANDES null (thiagodf83@hotmail.com) on 2017-02-03T21:14:57Z No. of bitstreams: 1 TESE PRONTA FINAL.pdf: 8515287 bytes, checksum: dedec31a9ce185e261cf9657fdb3dd34 (MD5) / Approved for entry into archive by LUIZA DE MENEZES ROMANETTO (luizamenezes@reitoria.unesp.br) on 2017-02-07T12:44:46Z (GMT) No. of bitstreams: 1 fernandes_td_dr_bot.pdf: 8515287 bytes, checksum: dedec31a9ce185e261cf9657fdb3dd34 (MD5) / Made available in DSpace on 2017-02-07T12:44:46Z (GMT). No. of bitstreams: 1 fernandes_td_dr_bot.pdf: 8515287 bytes, checksum: dedec31a9ce185e261cf9657fdb3dd34 (MD5) Previous issue date: 2016-12-05 / Introdução: O reflexo trigêmino-facial (RTF) pode ser estudado e mensurado através de técnica eletrofisiológica - o Blink Reflex. As respostas R2 são integradas em nível ponto-bulbar por neurônios que têm relação anatômica e funcional com a formação reticular, por sua vez relacionada à fisiologia do sono e fisiopatologia da Síndrome da Apneia Obstrutiva do Sono (SAOS). Objetivo: Estudar o RTF em pacientes com SAOS e correlacionar os achados com parâmetros polissonográficos. Métodos: Foram estudados 50 pacientes adultos com SAOS, de ambos os sexos, submetidos à polissonografia, estudos de condução nervosa sensitiva e motora nos membros, e estudo do RTF. Resultados: Dos 50 pacientes estudados, 10 preencheram critérios de exclusão. Dentre 40 pacientes analisados, o RTF foi normal em 7, mostrou achados de hiperexcitabilidade em 16 (grande amplitude, longa duração e/ou curta latência) - Grupo 1, e achados de hipoexcitabilidade em 17 (baixa amplitude e/ou latência prolongada ou resposta ausente) - Grupo 2, com diferenças estatisticamente significativas entre os grupos (p < 0.0001). As alterações do RTF não apresentaram correlações estatisticamente significativas com os diferentes parâmetros polissonográficos estudados. Conclusões: A avaliação eletrofisiológica do RTF permitiu separar pacientes com SAOS em 3 grupos (normal, achados de hiperexcitabilidade, achados de hipoexcitabilidade) evidenciando normalidade, disfunção e/ou lesão de grupos neuronais do tronco encefálico. / Background: The Blink Reflex can be evaluated through electrophysiological method. The R2 late responses are mediated by neuronal groups in the pons and medulla with anatomical and physiological relation with the reticular formation, wich is related to sleep physiology and physiopathology of the Obstructive Sleep Apnea (OSA). Objective: To study the Blink Reflex in patients with OSA and to correlate the findings with polysomnographic parameters. Methods: Fifty adult patients with OSA diagnosis were enrolled for polysomnography, limb conduction studies and Blink Reflex. Results: Ten patients fulfilled exclusion criteria. From 40 patients studied, 7 showed normal Blink Reflex, 16 hyperexcitability findings (high amplitude, long duration, and/or short latency response) - Group 1, and 17 hypo excitability findings (low amplitude and/or prolonged latency, or absent response) - Group 2, with significant differences between groups (p < 0.0001). No statistically significant difference was observed between the Blink Reflex abnormalities and the polysomnographic parameters evaluated. Conclusion: The electrophysiological evaluation of the blink reflex afforded to distinguish OSA patients in 3 groups (normal, hyperexcitability findings, hypo excitability findings) related to normality, dysfunction and/or injury of neuronal groups in the brainstem.

Resumo: A Síndrome de Apnéia Hipopnéia Obstrutiva do Sono é um distúrbio caracterizado por episódios repetidos de obstrução parcial ou completa da via aérea superior durante o sono, resultando em hipóxia intermitente, hipercapnia e fragmentação do sono. Afeta 0,7% a 3% das crianças na faixa etária pré-escolar, e está, nas crianças, relacionada com a hipertrofia das tonsilas palatina e/ou faríngeas. Em adultos, a SAHOS foi relacionada como fator de risco para doenças cardiovasculares e distúrbios metabólicos. Em crianças, há poucos relatos de alterações cardíacas como cor pulmonale ou HAS. Porém, as evidências fisiopatológicas da SAHOS permitem suspeitar que haja alterações estruturais e funcionais cardíacas, notadamente do ventrículo direito. Avaliar a função cardíaca de crianças com distúrbios respiratórios obstrutivos por hipertrofia das tonsilas, antes e após a cirurgia de adeno- e/ou tonsilectomia. Foram estudadas 40 crianças, de ambos os sexos, com idade entre 3 a 11 anos, das quais 30 estavam em seguimento no Ambulatório de Distúrbios do Sono, da disciplina de Otorrinolaringologia, FMB - UNESP, aguardando cirurgia de adeno- e/ou tonsilectomia por hipertrofia das tonsilas e distúrbios respiratórios obstrutivos, caracterizados por roncos, pausas respiratórias referidas e sono agitado. As outras 10 crianças eram controles saudáveis, os dois grupos estando homogêneos em relação ao sexo, idade, peso e altura. Todas as 40 crianças foram submetidas a ecocardiograma, visando as 4 câmaras em sístole e diástole... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Obstructive sleep apnea is characterized by intermittent partial or complete obstruction of the upper airway, causing hypoxemia, hypercapnia and sleep fragmentation. It affects 0,7% to 3% of the pre-school children, and in children it is closely related to enlarged tonsils. In adults, sleep apnea has been described as na independent risk factor for cardiovascular disease and metabolic disorders. In children, there a few studies for cardiovascular disfunction, most of them related to cor pulmonale or hypertension. Even though, the pathophysiologic mechanism of OSA permit to suspect of structural and functional cardiac changes, mostly of the right chambers. To study the heart function in children with sleep-related breathing disorders and enlarged tonsils, before and after adeno- and/or tonsillectomy. We studied 40 children, of both genders, aged between 3 and 11 years. Thirty children were at follow-up of Botucatu Medical School - State University of São Paulo due to hypertrophy of the tonsils and clincal complaints of Obstructive Sleep Apnea, as snoring, referred apneas and restless sleep. The other ten children were healthy controls; both groups were homogeneous in gender, age, weight and height. All 40 children were submitted to echocardiogram, analysing the four chambers, in systole and diastole... (Complete abstract click electronic access below) / Orientador: Jair Cortez Montovani / Coorientador: Beatriz Matsubara / Coorientador: José Roberto Fioretto / Doutor

INTRODUÇÃO: Uma alta prevalência de apnéia obstrutiva do sono (AOS) tem sido relatada em paciente com doença arterial coronária (DAC). Vários mecanismos relacionados à AOS, incluindo dessaturação da oxi-hemoglobina e aumento da demanda de oxigênio, aumento da atividade simpática bem como estado pro trombótico, podem ser perigosos nos pacientes com DAC. Entretanto, a AOS é pouco reconhecida e não é rotineiramente pesquisada nos pacientes admitidos em unidade de cuidados coronários (UCC) com DAC. O padrão ouro para o diagnóstico de AOS é a polissonografia noturna (PSG), método impraticável na UCC, pois implica no deslocamento do paciente para o laboratório de sono. OBJETIVOS: Construir e validar um monitor de oximetria para diagnóstico de AOS em pacientes admitidos na UCC com diagnóstico de DAC aguda. MÉTODOS: Foi inicialmente desenvolvido monitor de oximetria continua que registra os dados derivados dos monitores da UCC e permite a determinação do índice de dessaturação da oxi-hemoglobina (IDO) através de análise visual da curva de oximetria. O monitor foi então utilizado em pacientes consecutivos admitidos na UCC com diagnóstico de DAC aguda. Uma amostra desta população foi também estudada através de PSG, num período máximo de três meses após a alta. RESULTADOS: Trinta e sete pacientes foram estudados através de monitorização de oximetria durante a noite na UCC. PSG foi também realizada em vinte pacientes. AOS, diagnosticada pelo monitor de oximetria contínua (IDO > 5/hora), estava presente em 43% dos pacientes. AOS foi diagnosticada em 45% dos pacientes estudados com PSG (índice de apnéia e hipopnéia > 15 eventos por hora). Houve um bom nível de concordância entre o diagnóstico de AOS pelo monitor de oximetria na UCC e pela polissonografia - kappa = 0.898; p < 0.0001. O IDO determinado pelo monitor se correlacionou de forma significativa com o índice de apnéia e hipopnéia (r = 0.737; p < 0.0001). O diagnóstico de AOS através do monitor demonstrou sensibilidade de 88,9% e especificidade de 100%. CONCLUSÃO: O monitor desenvolvido no presente trabalho, que permite o registro da oximetria contínua a partir de dados que já são habitualmente coletados na UCC, é um método simples e preciso para o diagnóstico de AOS na UCC. / BACKGROND: A high prevalence of Obstructive sleep apnea (OSA) has been reported in patients with coronary artery disease (CAD). Several OSA related mechanisms, such as oxygen desaturation, high sympathetic activity, increased cardiac oxygen demand and a prothrombotic state, may be particularly dangerous in acute CAD patients. Nevertheless, OSA is frequently underdiagnosed and patients with CAD are not routinely screened for OSA when admitted to the Coronary Care Unit (CCU). OBJECTIVES: To build and validate a continuous overnight oximetry, by recording oximetry data derived from the CCU monitor, for the detection of OSA in acute CAD patients. DESIGN: We studied consecutive patients recruited on the basis of the presence of acute CAD requiring CCU, analyzed overnight continuous oximetry data and further compared it with full overnight polysomnography (PSG). RESULTS: Thirty-seven patients underwent overnight oxygen saturation monitoring in the CCU and 20 of these patients were submitted to PSG, performed within 3 months after hospital discharge. OSA was present in 43% and 45% of the patients studied by overnight oxygen saturation monitoring and PSG, respectively. The oxymetry derived oxygen desaturation index and the PSG derived apnea hypopnea index were strongly correlated (r = 0,737; p < 0,0001). There was a good level of agreement between abnormal oxymetric results and abnormal PSG results (kappa = 0.898; p < 0,0001). Overnight oximetry had a sensitivity of 88.9% and a specificity of 100% for OSA diagnosis. CONCLUSIONS: Continuous overnight oximetry derived from monitors that are already present in the CCU is a simple and accurate method for the diagnosis of OSA in the CCU.

A utilização de placas oclusais estabilizadoras para controle do Bruxismo do Sono (BS) é uma prática muito comum entre os odontólogos, no entanto, muitos profissionais fazem uso desta medida terapêutica sem avaliar a possibilidade do paciente ter, ou vir a desenvolver, outro distúrbio do sono associado, como a Síndrome da Apneia Obstrutiva do Sono (SAOS). Esta síndrome compromete a qualidade de vida pois aumenta o risco para doença cardiovascular assim como o risco para acidentes automotivos. Além disso, estudos sugerem que a utilização de placas oclusais poderia agravar o quadro da SAOS, uma vez que favoreceria à retrusão mandibular com consequente diminuição do espaço para a língua. Como a literatura ainda é inconclusiva e o questionamento clínico permanece, o objetivo do estudo foi avaliar os efeitos da utilização de uma placa miorrelaxante por, no mínimo, 2 meses sobre o sono de 11 pacientes com SAOS. Para tanto, foram aplicados questionários como o da Escala de Sonolência de Epworth (ESE) e o Índice de qualidade do sono de Pittsburgh (IQSP), também foram realizadas polissonografias (PSG) antes, e durante, a utilização da placa. A média de idade desses pacientes foi de 47 anos (mín 33/ máx 61) sendo que 63.6% era do gênero masculino. Os resultados dos questionários não revelaram diferença significante para os dois momentos da análise. No entanto, os dados polissonográficos evidenciaram aumento no Índice de Apneia e hipopneia (16,6-28,32 eventos por hora, p=0,003) e no Índice de Distúrbios Respiratórios (20,14-33,96 eventos por hora, p=0,003) quando da utilização da placa. Foi observado, também, uma dessaturação da oxiemoglobina mínima (85,55-79,36, p=0,026) e um aumento do tempo de saturação abaixo de 90% medido em minutos (1,43-3,98; p= 0,025). Foi possível concluir que a utilização da placa miorrelaxante, por um período de 2 meses, em pacientes portadores da SAOS, pode estar associada ao agravamento deste distúrbio. / The use of stabilization occlusal splints for Sleep Bruxism (SB) control is a very common practice among Dentists. However many professionals use this therapy without evaluating the possibility of their patients having, or developing other associated sleep disorders, such as Obstructive Sleep Apnea (OSA). This syndrome affects the quality of life, increases the risk of cardiovascular disease as well as traffic accidents. In addition, studies suggest that the use of occlusal splints may make OSA worse, once mandibular retrusion and decrease of tongue space may occur. Since literature is inconclusive and the clinical question remains, the objective of this study was to evaluate the effects over sleep of 11 OSA patients when using an occlusal stabilization splint for at least 2 months. Therefore, questionnaires such as Epworth Sleepiness Scale (ESS) and the Pittsburgh Sleep Quality Index (PSQI), in addition to polysomnography (PSG) were performed before, and during, splints use. Patients\' average age was 47 years old (33±61) and 63.6% were male. The questionnaire results revealed no significant difference for the two stages of analysis. However, polysomnographic data showed an increase in the apnea-hypopnea index (16.6 to 28.32 events per hour, p = 0.003) and respiratory disorders Index (20.14 to 33.96 events per hour, p = 0.003) when patients were using the occlusal splints. It was also observed a decrease of minimum oxyhemoglobin desaturation (85.55 to 79.36, P = 0.026) and an increase in saturation time below 90%, measured in minutes (from 1.43 to 3.98; p = 0.025). It was concluded that the use of occlusal splints for a period of 2 months in patients with OSA may be associated to aggravation of such disorder.

Age-related macular degeneration (AMD) is a chronic, irreversible disease that robs individuals of vision, quality of life, and independence. It is the leading cause of blindness in industrialized countries. Sleep-disordered breathing (SDB) is a condition characterized by repeated episodes of apnea and/or hypopnea, insomnia, short sleep duration, and/or sleep disturbances (snoring, gasping, etc.). Because SDB has been shown to cause chronic hypoxia resulting in oxidative stress on the retina, it has been proposed that SDB may be associated with AMD. Based on the life course theory of chronic disease, this quantitative, cross-sectional study used data from the 2005-2008 National Health and Nutrition Examination Survey to study whether there was an association between SDB and AMD, including neovascular AMD and geographic atrophy in adults 40 years and older. Descriptive statistics and logistic regression analyses were used. The results suggest that AMD is associated with diagnosed sleep disorders, including sleep apnea and insomnia, as well as sleep apnea symptoms of gasping snoring, snorting, and stopping breathing. The findings of this study highlight the importance of diagnostic screening and therapeutic intervention to treat SDB. Early diagnosis and therapy for SDB could address not only the comorbidities associated with SDB, but could also prevent or slow the progression of AMD. In turn, this would yield lower rates of vision loss, reduced comorbidities associated with vision loss, and reduced impact of AMD on the health care system and social and financial costs to society.

This study examined the prevalence rate of obstructive sleep apnea (OSA) as an independent variable in association with hypertension as an outcome. Studies conducted outside of the United States suggest that differences in craniofacial features among middle-aged Asians increase the prevalence of OSA in comparison to Caucasians with similar age and lower BMI. No similar study had been conducted in the United States. The sufficient component cause theory guided this study and was able to describe the association between OSA and hypertension among middle-aged Asians. The objective of this cross sectional retrospective study was to determine the prevalence rate of OSA and the association between OSA and hypertension among a sample of 462 middle-aged Asian patients. Also, the study evaluated the association of 8 clinical parameters: age, gender, smoking, body mass index, Mallampati score, Epworth Sleepiness Scale and Apnea-Hypopnea-Index, and hypertension. The logistic regression analysis showed that OSA is associated with hypertension. The model containing the 8 variables was statistically significant, x2 (8, N = 462) = 139.59, p < .000). Age was the strongest predictor among the 8 variables. This study showed that OSA is common among middle-age Asians. This research may necessitate the need to evaluate to change current medical awareness, diagnosis, and treatment of OSA and hypertension among Asians, which could reduce the cardiovascular disease (CVD) morbidity and mortality.

Objective The goal of this project was to define and measure human volumetric airway dimensions with radiographic volumetric three-dimensional imaging and digital reconstruction of the pharynx using cone beam computed tomography to directly correlate these measurements with both normal and developmentally deficient jaw joints and their positions. The volume of the oropharynx was measured by creating a superior border connecting the 3-D midpoint of sella turcica and the posterior nasal spine and extending inferiorly to the level connecting the most infero-anterior point of C3 and the anterior hyoid bone as seen in the multi-planar views of the cone beam computed tomography image. The calculations were accomplished by using 3dMD software. Further extrapolation of this study'a data may be useful to establish the direct association of obstructive sleep apnea and deficiencies of jaw growth and airway development. Design In this retrospective study, 250 subjects were randomly selected from a pool of 800 referred for dental imaging at ddi Imaging Center in Sacramento, California. Digital images were captured using a low-radiation, rapid scanning cone beam computed tomography system (iCAT). Results A total of 250 subjects, 163 females and 87 males, were included in this study. Descriptive statistics were applied to the following variables: 1. Assessment of the relationship between total airway volume and several categorically independent variables: * For total airway volume, no significant difference was found between males and females; between the right temporomandibular positions; between right temporomandibular integrity; or between the left temporomandibular integrity. * There was a significant difference found between the left temporomandibular positions for total airway volume. 2. Assessment of the relationship between total airway volume and each cephalometric measurement: * Based on the Spearman correlation test, there were significant increasing relationships between total airway volume and several of the cephalometric measurements (p<0.05). * Correlation coefficients ranged from 0.13 to 0.22 indicating there were weak correlations between the two variables. 3. Assessment of the relationship between total airway volume and age: * Based on the Spearman correlation test, there was no significant relationship between total airway volume and age (p=0.8304). In addition, Spearman correlation showed no correlation between total airway volume and sex and skeletal growth pattern tendencies. Conclusions Three dimensional images of the airway offer the opportunity to serially examine individuals, acquire airway patency information, and improve the evaluation of sites of airway obstruction. Further studies to determine the effects of pharyngeal stenosis and other regional changes to the oropharynx upon physiologic response may be key to understanding the effects of biomechanical influences upon craniofacial form. Comprehension of structural inter-relationships will also help develop an understanding of how and why adaptive changes in airway shape and volume occur. Airway patency is related to many variables: head posture, the direction of mandibular rotation during growth and development, and hyoid bone position. Further studies may offer an increased understanding of these structural and positional interrelationships.

Background. Obstructive Sleep Apnoea (OSA) is associated with an increase in nocturnal gastro-oesophageal reflux (nocturnalGOR) events and symptoms, however the mechanism for this remains undefined. Treatment of OSA with continuous positive airway pressure (CPAP) has been shown to reduce nocturnalGOR in individuals with OSA however the reasons for this reduction are not clear. The combination of OSA and nocturnalGOR could be particularly problematic for individuals who have had a lung transplant in whom Bronchiolitis Obliterans Syndrome (BOS) limits survival. It is thought that GOR plays a role in the development of BOS in these individuals. Methods and Results. Five interrelated studies were undertaken. The first two studies sought to determine and compare the prevalence and risk factors of nocturnalGOR in OSA patients with the general population. To do this, a GOR questionnaire was completed by 2,042 members of the general community as part of the Busselton Health Survey and by 1,116 patients with polysomnography-diagnosed OSA. Risk of OSA in the general population was determined using a standardised sleep questionnaire. 137 of the OSA patients completed the questionnaire before and after treatment with CPAP. The prevalence of nocturnalGOR symptoms reported more than once a week (frequent symptoms) was greater in OSA patients (10.1%) than the general population (5.8%) (p<0.001), in individuals from the general population at high (11.2%) than low risk of OSA (4.5%) (p<0.001) and in patients with severe (14.7%) than mild OSA (5.2%) (p<0.001). Treatment of OSA with CPAP decreased the prevalence of frequent nocturnalGOR from 9.0% to 3.8% (p=0.04). In the general population, high risk of OSA was independently associated with a 2.4-fold increased risk of frequent ABSTRACT vi nocturnalGOR symptoms than low risk. In the OSA group, disease severity was independently associated with nocturnalGOR symptoms, with an adjusted odds ratio of 1.7 for frequent nocturnalGOR symptoms.