Rinitis alérgica, apnea-hipopnea obstructiva del sueño y sensibilización a ácaros / Allergic rhinitis, obstructive sleep apnea-hypopnea and mite sensitization

La asociación de rinitis alérgica y el síndrome de apnea-hipopnea obstructiva del sueño se presenta en diferentes edades. En la rinitis alérgica y el síndrome de apnea-hipopnea obstructiva del sueño, puede estar involucrada la sensibilización a ácaros, principalmente: Dermatophagoides pteronyssinus, Dermatophagoides siboney y Blomia tropicalis. Con el objetivo de diagnosticar el síndrome de apnea-hipopnea obstructiva del sueño se seleccionaron 120 individuos del registro de alergia del Policlínico Previsora, Camagüey, Cuba, con diagnóstico presuntivo de rinitis alérgica y edad entre 5 y 15 años cumplidos. Todos tenían realizada la prueba de punción cutánea con Dermatophagoides pteronyssinus, Dermatophagoides siboney y Blomia tropicalis; algunos también, la poligrafía cardiorrespiratoria mediante el dispositivo ApneaLinkAirTM (Resmed Corp., RFA), utilizando el marcaje automático de eventos. La muestra fue de 40 casos (respiración oral, ronquidos) y 80 controles (sin respiración oral, ni ronquidos). La media del tamaño del habón fue de 7,9 mm en los casos y 4,1 mm en los controles (p꞊0,030). El índice de apnea-hipopnea fue positivo en 47 (39,1 por ciento) pacientes, de ellos, 36 (30 por ciento) casos y 11 (9,1 por ciento) controles (p=0,001). La sensibilidad y especificidad de la poligrafía cardiorrespiratoria mostró valores de 85,00 por ciento y 91,25 por ciento respectivamente que permiten afirmar el grado de eficacia de la prueba para diagnosticar apnea e hipopnea obstructiva del sueño. Los pacientes con síndrome de apnea-hipopnea obstructiva del sueño en los casos y controles presentaron incremento, con predominio para casos. La poligrafía cardiorrespiratoria con el dispositivo ApneaLink permite hacer el diagnóstico del síndrome de apnea-hipopnea obstructiva del sueño en rinitis alérgica(AU)

The association of allergic rhinitis and obstructive sleep apnea-hypopnea syndrome occurs at different ages. In allergic rhinitis and obstructive sleep apnea-hypopnea syndrome, sensitization to mites may be involved, mainly: Dermatophagoides pteronyssinus, Dermatophagoides siboney and Blomia tropicalis. With the objective to diagnose obstructive sleep apnea-hypopnea syndrome, 120 individuals were selected from the allergy registry of the Previsora Polyclinic, Camagüey, Cuba, with a presumptive diagnosis of allergic rhinitis and ages between 5 and 15 years old. All had the skin prick test with Dermatophagoides pteronyssinus, Dermatophagoides siboney and Blomia tropicalis; some also, cardio-respiratory polygraphy with the ApneaLink AirTM device (Resmed Corp., RFA), using automatic event marking. The sample consisted of 40 cases (oral breathing, snoring) and 80 controls (no oral breathing or snoring). The mean size of the wheal was 7.9 mm in the cases and 4.1 mm in the controls (p꞊0.030). The apnea and hypopnea index was positive in 47 (39.1 percent) patients, of which 36 (30 percent) were cases and 11 (9.1 percent) were controls (p=0.001). The sensitivity and specificity of the cardiorespiratory polygraphy showed values of 85.00 percent and 91.25 percent, respectively, which allow affirming the degree of efficacy of the test to diagnose obstructive sleep apnea-hypopnea. Patients with obstructive sleep apnea-hypopnea syndrome in cases and controls presented an increase, with a predominance for cases. Cardiorespiratory polygraphy with the ApneaLink device allows the diagnosis of obstructive sleep apnea-hypopnea syndrome in allergic rhinitis(AU)

Descripción clínica y hallazgos polisomnográficos en tres pacientes con Síndrome de Treacher Collins / Clinical description and polysomnographic findings in three patients with Treacher Collins

El Síndrome de Treacher Collins (STC) es una enfermedad congénita del desarrollo craneofacial, siendo una complicación frecuente la obstrucción de la vía aérea. Objetivo: Describir clínicamente tres casos de STC y sus hallazgos polisomnográficos. Diseño: Estudio observacional, descriptivo y retrospectivo. Revisión de fichas clínicas y polisomnografías (PSG). Resultados: Se incluyeron tres pacientes con STC, de 1, 17 y 20 años, dos hombres. Todos presentaron malformaciones faciales compatibles con el STC. El paciente menor tuvo apneas desde el nacimiento. En las PSG, todos presentaron eficiencia del sueño disminuida e índice de microdespertares aumentado. Solo un paciente tuvo diagnóstico de Síndrome de Apnea/Hipoapnea Obstructiva del Sueño (SAHOS) severo. Conclusiones: Aún cuando las anomalías craneofaciales no difirieron entre los pacientes, hubo sólo un caso de SAHOS severo. Las otras alteraciones descritas en la PSG afectan la calidad de vida, siendo relevante la búsqueda activa de trastornos respiratorios del sueño en estos pacientes.

Treacher Collins Syndrome (STC) is a congenital craniofacial disorder, being the airway obstruction a frequent complication. Objective: To describe clinical and polysomnographic findings of three cases with STC. Methods: An observational, descriptive and retrospective study. Review of clinical records and nocturnal polysomnography was carried out. Results: Three patients with STC were included of 1, 17 and 20 years old, two were males. All of them with facial malformations compatible with STC. Only the youngest presented apneas since birth. All patients had decreased sleep efficiency and increased arousal index. Only one patient presented with severe Obstructive Sleep Apnea Syndrome (OSAS). Conclusions: Despite the fact that all the patients had similar craniofacial anomalies, only one presented with severe OSAS. The other abnormalities described in the polysomnography affect the quality of life, being relevant performing an active screening of breathing-related sleep disorders in these patients.

Prevalência do risco para Apneia Obstrutiva do Sono em usuários do Programa de Atenção à Saúde de um hospital referência / Prevalence of risk for Obstructive Sleep Apnea in users of the Health Care Program of a reference hospital

Objetivos: O estudo teve por objetivo, verificar a prevalência de indivíduos que apresentam risco intermediário ou alto para desenvolver Apneia Obstrutiva do Sono (AOS) e verificar o nível de conhecimento destes indivíduos sobre a doença. Métodos: É um estudo transversal, quantitativo, descritivo, conduzido nos meses de maio, junho e agosto de 2018, durante a execução do programa "Saúde na Praça". A coleta foi realizada por meio da aplicação do questionário de triagem da apneia obstrutiva do sono (STOP Bang) e questões complementares relacionadas à dados sociodemográficos, doenças preexistentes e à qualidade do sono. As perguntas foram relacionadas ao cansaço, ronco, apneia observada, pressão sanguínea alta, índice de massa corporal (IMC), idade e circunferência cervical. Resultados: Dos 305 indivíduos selecionados, 33,8% apresentaram risco baixo para AOS, 33,8% risco intermediário e 32,5% risco alto. Dos que apresentaram risco alto, a maioria era do sexo masculino (62,6%); 55,6% referiram noctúria, 59,6% relataram dificuldade de concentração, 66,7% déficit de memória, 58,6% déficit de atenção, 62,5% referiram sono agitado, 36,4% suor excessivo enquanto dormem, 72,7% disseram ser hipertensos e 37,4% referiram ser diabéticos. Conclusão: A apneia obstrutiva do sono tem sido pouco abordada em programas de promoção de saúde e o presente estudo mostrou que tanto indivíduos de baixo risco, quanto os de riscos intermediário ou alto, tinham pouco conhecimento sobre a AOS

Objectives: The objective of this study, was to verify the prevalence of individuals with intermediate or high risk for developing OSA and to verify their level of knowledge about the disease. Methods: This is a cross-sectional, quantitative and descriptive study conducted in May, June and August 2018, during the execution of the "Health in the square" program. The collection was performed by applying the obstructive sleep apnea screening questionnaire (STOP Bang) and complementary questions related to sociodemographic data, pre-existing diseases and sleep quality.The questions were related to tiredness, snoring, observed apnea, high blood pressure, body mass index (BMI), age and cervical circumference. Results: Of the 305 individuals selected, 33,8% had low risk for OSA, 33,8% intermediate risk and 32,5% high risk. Of those at high risk, most were male (62,6%), 55,6% reported nocturia, 59,6% reported difficulty concentrating, 66,7% memory deficit, 58,6% attention deficit, 62,5% reported restless sleep, 36,4% reported excessive sweating while sleeping, 72,7% reported being hypertensive and 37,4% reported being diabetic. Conclusion: Obstructive Sleep Apnea has been poorly addressed in health promotion programs and the present study showed that both low-risk and intermediate- or high-risk individuals had little knowledge about OSA

Perfil miofuncional orofacial de pacientes com distúrbios do sono: relação com resultado da polissonografia / Orofacial myofunctional profile of patients with sleep disorders: relationship with result of polysomnography

RESUMO Objetivo Este trabalho se propõe a caracterizar o perfil miofuncional orofacial de pacientes com distúrbios do sono e relacionar esses com a gravidade do resultado da polissonografia. Método Estudo transversal, de campo, realizado com pacientes encaminhados para polissonografia, com amostra aleatória, composta por pacientes adultos, de ambos os gêneros, com queixa de ronco e que não estivessem recebendo alguma forma de tratamento para o distúrbio do sono. Foi realizada avaliação fonoaudiológica antroposcópica e coletado o resultado do exame de polissonografia, a fim de responder aos objetivos do trabalho. Resultados Verificou-se associação significativa entre a gravidade do distúrbio de sono e variáveis ambientais, tais como tabagismo e etilismo; também com características individuais, tais como raça, índice de massa corporal, circunferência abdominal e hipertensão arterial sistêmica. Do ponto de vista das características miofuncionais, verificou-se relação positiva entre a gravidade da Síndrome da Apneia e Hipopneia Obstrutiva do Sono com a contração do músculo mentual, classe de Mallampati, elevação de dorso de língua, espessura de língua, características da úvula, extensão e mobilidade de palato mole, e alteração no padrão respiratório. Conclusão A pesquisa possibilitou descrever uma tendência da existência de alterações miofuncionais orofaciais em indivíduos com Síndrome da Apneia e Hipopneia Obstrutiva do Sono e revelou, ainda, que quanto maior o grau de comprometimento das estruturas orofaciais, maior também se revela o grau do distúrbio.

ABSTRACT Purpose This study aims to characterize the orofacial myofunctional profile of patients with sleep disorders and to relate them to the severity of the polysomnography result. Methods A cross-sectional, field study of patients referred to polysomnography with a random sample of adult patients of both genders complaining of snoring who were not receiving any form of treatment for sleep disorder. An anthroposcopic speech-language evaluation was performed and the results of the polysomnography examination were collected in order to respond to the objectives of the study. Results There was a significant association between the severity of the sleep disorder and environmental variables, such as smoking and alcoholism; also with individual characteristics, such as race, body mass index, waist circumference and systemic arterial hypertension. From the point of view of the myofunctional characteristics, there was a positive relationship between the severity of Obstructive Sleep Apnea and Hypopnea Syndrome with mental muscle contraction, Mallampati class, tongue dorsum elevation, tongue thickness, uvula characteristics, extension and mobility of the soft palate, and alteration in the respiratory pattern. Conclusion This study made it possible to describe a trend of the existence of orofacial myofunctional alterations in individuals with Sleep Apnea and Obstructive Hypopnea Syndrome and also revealed that the greater the degree of impairment of orofacial structures, the greater the degree of disturbance is also revealed.

Evaluación de los cuestionarios de sueño en la pesquisa de pacientes con síndrome de apneas obstructivas del sueño / Accuracy of sleep questionnaires for obstructive sleep apnea syndrome screening

Background: Simple but accurate tools should be used to identify patients with obstructive sleep apnea syndrome (OSAS), aiming at an early detection and prevention of serious consequences. Aim: To assess the predictive value of four sleep questionnaires (Berlin, Epworth Sleepiness Scale [ESS], STOP, and STOP-Bang) in the screening of patients with OSAS. Material and Methods: The four sleep questionnaires were administered to 1,050 snorers aged 56 ± 15 years (68% males) assessed at a sleep clinic. An overnight unattended respiratory polygraphy was performed to all patients to confirm the diagnosis of OSAS. The sensitivity, specificity, positive and negative predictive values of the four questionnaires were calculated. Results: Eighty four percent of participants had OSAS. The clinical variables associated with OSAS risk were age, male gender, hypertension, overweight, cervical circumference, waist/hip ratio, history of snoring, witnessed apneas and nycturia. Eighty-three, 86, 92 and 46 % of cases were classified as having a high risk for OSAS, according to the Berlin, STOP and STOP-Bang questionnaires and ESS, respectively. STOP and STOP-Bang questionnaires had the highest sensitivity to predict OSAS (88 and 95%, respectively) while the Flemons Index had the highest specificity (82%). Conclusions: Sleep questionnaires were able to identify patients with a high risk for OSAS but without accurately excluding those at low risk.

Obstructive Sleep Apnea is Common and Associated with Heart Remodeling in Patients with Chagas Disease / Apneia Obstrutiva do Sono é Comum e está Associada à Remodelação Cardíaca em Pacientes com Doença de Chagas

Abstract Background: Chagas Disease (CD) is an important cause of morbimortality due to heart failure and malignant arrhythmias worldwide, especially in Latin America. Objective: To investigate the association of obstructive sleep apnea (OSA) with heart remodeling and cardiac arrhythmias in patients CD. Methods: Consecutive patients with CD, aged between 30 to 65 years old were enrolled. Participants underwent clinical evaluation, sleep study, 24-hour Holter monitoring, echocardiogram and ambulatory blood pressure monitoring. Results: We evaluated 135 patients [age: 56 (45-62) years; 30% men; BMI: 26 ± 4 kg/m2, Chagas cardiomyopathy: 70%]. Moderate to severe OSA (apnea-hypopnea index, AHI, ≥ 15 events/h) was present in 21% of the patients. OSA was not associated with arrhythmias in this population. As compared to patients with mild or no OSA, patients with moderate to severe OSA had higher frequency of hypertension (79% vs. 72% vs. 44%, p < 0.01) higher nocturnal systolic blood pressure: 119 ± 17 vs. 113 ± 13 vs. 110 ± 11 mmHg, p = 0.01; larger left atrial diameter [37 (33-42) vs. 35 (33-39) vs. 33 (30-36) mm, p < 0.01]; and a greater proportion of left ventricular dysfunction [LVEF < 50% (39% vs. 28% vs. 11%), p < 0.01], respectively. Predictor of left atrial dimension was Log10 (AHI) (b = 3.86, 95% CI: 1.91 to 5.81; p < 0.01). Predictors of ventricular dysfunction were AHI > 15 events/h (OR = 3.61, 95% CI: 1.31 - 9.98; p = 0.01), systolic blood pressure (OR = 1.06, 95% CI: 1.02 - 1.10; p < 0.01) and male gender (OR = 3.24, 95% CI: 1.31 - 8.01; p = 0.01). Conclusions: OSA is independently associated with atrial and ventricular remodeling in patients with CD.

Resumo Fundamento: A doença de Chagas (DC) é uma causa importante de morbimortalidade por insuficiência cardíaca e arritmias malignas em todo o mundo, especialmente na América Latina. Objetivo: Investigar a associação entre apneia obstrutiva do sono (AOS) com remodelação cardíaca e arritmias cardíacas em pacientes com DC. Métodos: Foram incluídos pacientes consecutivos com DC, com idade entre 30 e 65 anos. Os participantes foram submetidos à avaliação clínica, estudo do sono, Holter de 24 horas, ecocardiograma e monitorização ambulatorial da pressão arterial. Resultados: Foram avaliados 135 pacientes [idade: 56 (45-62) anos; 30% homens; IMC: 26 ± 4 kg/m2, cardiomiopatia chagásica: 70%]. AOS moderada a grave (índice de apneia-hipopneia, IAH, ≥ 15 eventos/h) estava presente em 21% dos pacientes. AOS não estava associada a arritmias nessa população. Em comparação com pacientes com AOS leve ou ausente, pacientes com AOS moderada a grave apresentaram maior frequência de hipertensão (79% vs. 72% vs. 44%, p < 0,01) e pressão arterial sistólica noturna mais alta: 119 ± 17 vs. 113 ± 13 vs. 110 ± 11 mmHg, p = 0,01; diâmetro do átrio esquerdo maior [37 (33‑42) vs. 35 (33-39) vs. 33 (30-36) mm, p < 0,01]; e maior proporção de disfunção ventricular esquerda [FEVE < 50% (39% vs. 28% vs. 11%), p < 0,01], respectivamente. O preditor de dimensão do átrio esquerdo foi Log10 (IAH) (β = 3,86, IC 95%: 1,91 a 5,81; p < 0,01). Os preditores de disfunção ventricular foram IAH >15 eventos/h (OR = 3,61, IC 95%: 1,31 - 9,98; p = 0,01), pressão arterial sistólica (OR = 1,06, IC95%: 1,02 - 1,10; p < 0,01) e sexo masculino (OR = 3,24, IC 95%: 1,31 - 8,01; p = 0,01). Conclusões: A AOS está independentemente associada à remodelação atrial e ventricular em pacientes com DC.

Overactive bladder syndrome and bladder wall thickness in patients with obstructive sleep apnea syndrome

ABSTRACT Objective The main objective of the present study was to evaluate the presence of overactive bladder (OAB) syndrome, nocturia, urgency, and urge incontinence in patients with obstructive sleep apnea syndrome (OSAS), and measure bladder wall thickness (BWT) in these patients. Materials and Methods The patient group was composed of 38 patients with OSAS. The control group was composed of 15 healthy individuals. All patients were evaluated using the Epworth Sleepiness Scale (ESS) and Overactive Bladder Symptom Score (OABSS). The bladder wall thickness was measured by transabdominal ultrasound (US). The presence of nocturia, urinary urgency, and urge incontinence were also evaluated. Results The mean OABSS was significantly higher in the patient group compared with the control group (p=0.048). The minimum oxygen saturation (Min.SO2) of patients with urgency was found to be significantly lower (p=0.014). The time spent below 90% of oxygen saturation (SO2) was significantly longer in patients with urinary urgency (p=0.009). There was no difference in BWT measurements between the patient group and the control group. There was a significant relationship between BWT values and OABSS in patients with OSAS (p=0.002). Conclusion The results of the present study suggest that OSAS is associated with OAB syndrome. As a key symptom of OAB, urgency correlates with hypoxia in cases with OSAS. Although the present study did not observe any difference in BWT measurements between the patients and the control group, there was a correlation between BWT measurements and OABSS in patients with OSAS.

Prevalencia de riesgo de apnea obstructiva del sueño en población adulta chilena / Prevalence of risk of obstructive sleep apnea in Chilean adult population

Introducción: En Chile la apnea obstructiva del sueño (AOS) es una enfermedad crónica insuficientemente reconocida, que probablemente emerge bajo condiciones epidemiológicas apropiadas. Nuestro objetivo fue estimar su prevalencia en nuestra población adulta. Pacientes y Métodos: A través de la 2ᵃ Encuesta Nacional de Salud (ENS) 2010, estimamos la prevalencia de riesgo de AOS en población ≥ 18 años de edad. Derivada del STOP-Bang Questionnaire construimos una regla de predicción clínica-RPC: ronquido habitual, somnolencia diurna, pausas respiratorias nocturnas, hipertensión arterial, IMC > 35 kg/m2, edad > 50 años, circunferencia cervical ≥ 43 cm (hombres) y ≥ 41 cm (mujeres), sexo: hombre. Según el puntaje total, el riesgo de los sujetos se clasificó como: Bajo (< 3), Medio (3-4) y Alto (≥ 5). Para obtener prevalencia e intervalos de confianza al 95%, usamos el módulo para muestras complejas del Software SPSS (v22). Resultados: Obtuvimos 5.069 registros, edad promedio: 48 ± 18 años, 60% mujeres. Una submuestra de 4.234 cumplió los criterios de la RPC. La muestra expandida (representando 11.279.865 personas) arrojó los siguientes resultados: riesgo Bajo 60,7% (CI 95%, 58-63,4), Medio 31,1% (28,7-33,6) y Alto 8,2% (7-9,5). Riesgo en hombres: Bajo 45,8% (41,7-49,9), Medio 41,1% (37,3-45,1), Alto 13,1% (11-15,5). Riesgo en mujeres: Bajo 74,6% (71,6-77,4), Medio 21,8% (19,4-24,4), Alto 3,6% (2,5-5,1). Observamos un incremento del riesgo Alto de AOS desde 0,3% (0-1,8) en el grupo etario de 18-24 años, a 22,9% (18,4-28,2) en las personas mayores de 65 años. Los hombres con la mayor prevalencia de Alto riesgo de AOS provenían de 7 de las 15 Regiones de Chile: Araucanía (24%), Aysén (21,3%), Coquimbo (18%), Maule (17,8%), Bio-Bío (17%), Arica (16,2%) y O'Higgins (15,7%). Conclusiones: La AOS es una condición prevalente en la población chilena, es mayor en hombres que en mujeres y se observó que el riesgo Alto tiende a aumentar con la edad.

Introduction: Obstructive sleep apnea (OSA) is a neglected chronic disease probably emerging under appropriate epidemiological conditions in Chile. Our goal was to estimate the prevalence of OSA risk in adult population. Patients and Methods: From the 2nd Chilean Health Survey 2010 (NHS), we estimate the prevalence of risk of OSA in population ≥ 18 years, as a derived proxy from STOPBang Questionnaire. A clinical prediction rule-CPR: habitual snoring, daytime sleepiness, nocturnal breathing pauses, blood hypertension, BMI > 35 kg/m2, age > 50 y.o., neck circumference ≥ 43 cm (men) and ≥ 41 cm (women) and male, was constructed. According to the total score subjects were classified as: Low (< 3), Medium (3-4), and High Risk (≥ 5). SPSS Software (v22) modules for complex survey was used to obtain population prevalence and 95% confidence intervals. Results: 5,069 records were obtained, mean age 48 ± 18 years, 60% women. A subsample of 4,234 fulfil the criteria per the CPR. The expanded sample (representing 11,279,865 persons), yielded the following results: Low risk 60.7% (CI 95%, 58-63.4), Medium 31.1% (28.7-33.6) and High 8.2% (7-9.5). Men with Low risk 45.8% (41.7-49.9), Medium 41.1% (37.3-45.1), High 13.1% (11-15.5). Women with Low risk 74.6% (71.6-77.4), Medium 21.8% (19.4-24.4), High 3.6% (2.5-5.1). We observed an increasing trend in High risk of OSA from 0.3% (0-1.8) in 18-24 years old group to a 22.9% (18.4-28.2) in people aged > 65 years old. Men with the highest prevalence of High risk OSA are in 7 of the 15 Regions: Araucanía (24%), Aysén (21.3%), Coquimbo (18%), Maule (17.8%), Bio-Bio (17%), Arica (16,2%) and O'Higgins (15.7%). Conclusion: OSA is a prevalent condition in Chilean Population, is higher in men than in women and a positive age trend of high risk OSA was observed.

The critical influence of nocturnal breathing complaints on the quality of sleep after stroke: the Pittsburgh Sleep Quality Index and STOP-BANG / A influência crítica das queixas respiratórias noturnas na qualidade final do sono após acidente vascular cerebral: índice de qualidade de sono de Pittsburgh e STOP-BANG

ABSTRACT In stroke patients particularly, many factors, such as sleep-related respiratory disturbances, can impair sleep. Cheap and easy-to-use tools have been created to identify sleep quality and sleep disturbances in patients after stroke. This study described the scores of the sleep apnea screening questionnaire - STOP-BANG - in patients after a stroke, and correlated the findings with sleep quality measured by the Pittsburgh Sleep Quality Index (PSQI). The scores of the STOP-BANG and PSQI were 4.3 ± 1.8 and 76 ± 3.9, respectively. The STOP-BANG scores were higher in poor sleepers (4.5 ± 1.6 versus 3.5 ± 1.9; p = 0.032). Logistic regression analysis was used to identify predictors of subjective sleep quality (PSQI) and the STOP-BANG as a predictor of poor quality sleep, with a relative risk of 1.6, controlled for age and sex. This study indicated that sleep quality was largely influenced by sleep breathing problems, which were well identified by the STOP-BANG, especially in younger stroke patients.

RESUMO Especialmente em pacientes com acidente vascular cerebral (AVC), muitos fatores prejudicam o sono, como distúrbios respiratórios do sono (DRS). Ferramentas mais baratas foram usadas para identificar a qualidade do sono e distúrbios do sono após AVC. Este estudo verificou a influência das queixas DRS na qualidade do sono após AVC utilizando questionários. Nós investigamos a qualidade do sono eo risco de Apneia Obstrutiva do Sono com o Índice de Qualidade do Sono de Pittsburgh (PSQI) e Stop-Bang em 68 pacientes após AVC. As pontuações de STOP-BANG e PSQI foram de 4,3 ± 1,8 e 7,6 ± 3,9, respectivamente. As pontuações de STOP-BANG foram mais elevadas em pacientes com sono ruim (4,5 ± 1,6 versus 3,5 ± 1,9; p = 0,032). A regressão logística caracterizou o STOP-BANG como preditor de um sono de má qualidade. Estes achados confirmam a influência das queixas respiratórias noturnas na qualidade do sono após AVC.

Obstructive sleep apnea syndrome among obese individuals: A cross-sectional study / Síndrome da apneia obstrutiva do sono em indivíduos portadores de obesidade: um estudo transversal

Summary Introduction: The obstructive sleep apnea syndrome (OSAS) is a respiratory illness, characterized by recurrent episodes of apnea and hypopnea, leading to reduction or cessation of the airflow. Obesity is one of the major risk factors for the development of OSAS. To help in the diagnosis of this disease, easily applicable and low-cost questionnaries were developed, such as the Berlin Questionnaire (BQ). Objective: To evaluate the efficacy of the BQ for the screening of OSAS among candidates to bariatric surgery in a multidisciplinary preoperative program. Method: This is an observational, descriptive and cross-sectional study which evaluated obese individuals that were being prepared for bariatric surgery by means of the BQ. Results: BQ was able to detect that minimal variations in the body mass index, neck circumference and hip-to-waist ratio lead to changes in the risk to develop OSAS; the higher the values of these variables, the higher the risk for OSAS development. Conclusion: BQ was an efficient and reliable tool to demonstrate the high risk for OSAS development in individual with obesity.

Resumo Introdução: A síndrome da apneia obstrutiva do sono (SAOS) é uma patologia respiratória, caracterizada por episódios recorrentes de apneia e hipopneia, resultando na cessação ou redução do fluxo aéreo. A obesidade é um dos principais fatores de risco para o desenvolvimento da SAOS. Foram criadas formas de auxiliar o diagnóstico da doença por meio de questionários de fácil aplicação e baixo custo, como o questionário de Berlim (QB). Objetivo: Avaliar a eficácia do QB para rastreamento do risco de desenvolvimento da SAOS em indivíduos portadores de obesidade que participaram do grupo multidisciplinar de preparo pré-operatório para cirurgia bariátrica do Hospital de Clínicas da Universidade Estadual de Campinas (HC-Unicamp). Método: O estudo foi observacional, descritivo e transversal, e avaliou portadores de obesidade que participavam do Programa multidisciplinar de preparo pré-operatório para cirurgia bariátrica do HC-Unicamp foram avaliados por meio do QB. Resultados: O QB foi capaz de detectar que mínimas oscilações no índice de massa corpórea (IMC), na circunferência cervical (Ccv), na circunferência da cintura e na relação cintura/quadril (RCQ) podem alterar o risco de desenvolvimento de SAOS, sendo que quanto maior esses valores, maior o risco de desenvolvimento de SAOS. Conclusão: O QB é uma ferramenta eficaz e fidedigna em demonstrar a prevalência do risco alto para o desenvolvimento da SAOS em indivíduos portadores de obesidade, dado esse que, quando correlacionado com IMC, aumento de idade, medida de cintura, Ccv e RCQ, faz o risco tender a aumentar de forma exponencial.

Sleep-disordered breathing in patients with COPD and mild hypoxemia: prevalence and predictive variables / Prevalência e variáveis preditivas de distúrbios respiratórios do sono em pacientes com DPOC e hipoxemia leve

ABSTRACT Objective: To infer the prevalence and variables predictive of isolated nocturnal hypoxemia and obstructive sleep apnea (OSA) in patients with COPD and mild hypoxemia. Methods: This was a cross-sectional study involving clinically stable COPD outpatients with mild hypoxemia (oxygen saturation = 90-94%) at a clinical center specializing in respiratory diseases, located in the city of Goiânia, Brazil. The patients underwent clinical evaluation, spirometry, polysomnography, echocardiography, arterial blood gas analysis, six-minute walk test assessment, and chest X-ray. Results: The sample included 64 patients with COPD and mild hypoxemia; 39 (61%) were diagnosed with sleep-disordered breathing (OSA, in 14; and isolated nocturnal hypoxemia, in 25). Correlation analysis showed that PaO2 correlated moderately with mean sleep oxygen saturation (r = 0.45; p = 0.0002), mean rapid eye movement (REM) sleep oxygen saturation (r = 0.43; p = 0.001), and mean non-REM sleep oxygen saturation (r = 0.42; p = 0.001). A cut-off point of PaO2 ≤ 70 mmHg in the arterial blood gas analysis was significantly associated with sleep-disordered breathing (OR = 4.59; 95% CI: 1.54-13.67; p = 0.01). The model showed that, for identifying sleep-disordered breathing, the cut-off point had a specificity of 73.9% (95% CI: 51.6-89.8%), a sensitivity of 63.4% (95% CI: 46.9-77.9%), a positive predictive value of 81.3% (95% CI: 67.7-90.0%), and a negative predictive value of 53.1% (95% CI: 41.4-64.4%), with an area under the ROC curve of 0.69 (95% CI: 0.57-0.80), correctly classifying the observations in 67.2% of the cases. Conclusions: In our sample of patients with COPD and mild hypoxemia, the prevalence of sleep-disordered breathing was high (61%), suggesting that such patients would benefit from sleep studies.

RESUMO Objetivo: Inferir a prevalência e as variáveis preditivas de hipoxemia noturna e apneia obstrutiva do sono (AOS) em pacientes portadores de DPOC com hipoxemia leve. Métodos: Estudo transversal realizado em pacientes ambulatoriais, clinicamente estáveis, portadores de DPOC e hipoxemia leve (saturação de oxigênio = 90-94%) em um centro clínico especializado no atendimento de doenças respiratórias em Goiânia (GO). Os pacientes foram submetidos à avaliação clínica, espirometria, polissonografia, ecocardiografia, gasometria arterial, teste de caminhada de seis minutos e radiografia de tórax. Resultados: Foram avaliados 64 pacientes com DPOC e hipoxemia leve, e 39 (61%) apresentaram distúrbios respiratórios do sono (14 com AOS e 25 com hipoxemia noturna isolada). A análise de correlação mostrou moderada correlação da PaO2 com saturação média do sono (r = 0,45; p = 0,0002), saturação média do sono rapid eye movement (REM; r = 0,43; p = 0,001) e saturação média do sono não-REM (r = 0,42; p = 0,001). Um ponto de corte de PaO2 ≤ 70 mmHg (OR = 4,59; IC95%: 1,54-13,67; p = 0,01) na gasometria arterial foi significativamente associada com distúrbios respiratórios do sono. O modelo mostrou que, para identificar distúrbios respiratórios do sono, o ponto de corte teve uma especificidade de 73,9% (IC95%: 51,6-89,8%), uma sensibilidade de 63,4% (IC95%: 46,9-77,9%) e valores preditivos positivo e negativo de 81,3% (IC95%: 67,7-90,0%) e 53,1% (IC95%: 41,4-64,4%), respectivamente. A área sob a curva ROC foi de 0,69 (IC95%: 0,57-0,80), e a proporção de observações corretamente classificadas foi de 67,2% dos casos. Conclusões: A elevada prevalência de distúrbios respiratórios do sono em portadores de DPOC e hipoxemia leve nesta amostra (61%) sugere que esses pacientes podem se beneficiar da realização de estudos do sono.

STOP-BANG, una herramienta útil y sencilla para el cribado del síndrome de apneas hipopneas obstructivas del sueño / STOP-BANG, a useful and easy tool for the screening of obstructive sleep apnea

El cuestionario STOP-BANG, del acrónimo en inglés S snore (ronquido), T tired (cansancio), Oobserved apneas (apneas observadas), P pressure (hipertensión arterial), B BMI (índice de masa corporal >35 kg/m2), A age (edad > 50 años), N neck (circunferencia del cuello > 40 cm) y G gender (sexo masculino), es una herramienta sencilla que permite detectar pacientes con síndrome de apneas/ hipopneas obstructivas del sueño (SAHOS). Si el paciente suma 3 o más puntos se considera que tiene una alta probabilidad de padecerlo. El objetivo de nuestro trabajo fue evaluar la capacidad del cuestionario STOP-BANG y compararla con la habilidad del médico neumonólogo capacitado en sueño para determinar la probabilidad de tener SAHOS. Se analizaron en forma retrospectiva 327 pacientes con sospecha de esta condición. Sexo masculino 171 (52.3%), edad 49.8 (37.9-61.7) años, índice de masa corporal (IMC) 38.7 (32.5-46) kg/m², circunferencia del cuello 44 (41-47.5) cm, roncadores 311 (95.1%), con somnolencia o cansancio 232 (70.9%), con apneas observadas 206 (63%), HTA 169 (51.7%), polisomnografía (PSG) normal 42 (12.9%), leve 65 (19.9%), moderada 59 (18%) y grave 161 (49.2%). La sensibilidad y especificidad del STOP-BANG, tomando como punto de corte un índice de perturbación respiratoria (IPR) = 15, fueron 99.1% y 14.0%, área bajo la curva (ABC) 0.755 (0.704-0.800), las de la habilidad del médico fueron 89.1% y 58.9%, ABC 0.550 (0.542-0.638). El STOP-BANG es una herramienta de fácil aplicación para el cribado de pacientes con sospecha de SAHOS.

The STO-BANG questionnaire, S standing for snore, T tired, O observed apneas, P pressure (arterial hypertension), B BMI (body mass index > 35 kg/ m2), A age (> 50 years old), N neck circumference (> 40 cm), G gender (male); is a simple tool that enables the detection of patients with obstructive sleep apnea syndrome (OSA). If the patient adds 3 or more points, it is considered to have a high probability of having this disease. Our goal was to evaluate the capacity of the STOP-BANG questionnaire and to compare it with the ability of a sleep trained pulmonologist in determining the probability of OSA. A retrospective analysis of 327 patients suspected of having this condition was performed. One hundred and seventy-one were males (52.3%), 49.8 years old (37.9-61.7), BMI 38.7 kg/m² (32.5-46), neck circumference 44 cm (41-47.5), 311 snorers (95.1%), 232 with daytime sleepiness or usual tiredness (70.9%), 206 with observed apneas (63%), 169 with arterial hypertension (51.7%), normal polysomnography 42 (12.9%), mild 65 (19.9%), moderate 59 (18%), severe 161 (49.2%). The STOP-BANG´s sensibility and specificity, taking as a cut-off point a respiratory disturbance index (RDI) > or = to 15, was 99.1% and 14.0% respectively, area under curve (AUC) 0.755 (0.704-0.800), the values for the PR actioner's ability were 89.1% and 58.9% respectively, AUC 0.550 (0.542-0.638). The STOP-BANG questionnaire is easy to implement as a screening tool.

Managing obstructive sleep apnoea in children: the role of craniofacial morphology

Obstructive sleep apnoea syndrome is a type of sleep-disordered breathing that affects 1 to 5% of all children. Pharyngeal and palatine tonsil hypertrophy is the main predisposing factor. Various abnormalities are predisposing factors for obstructive sleep apnoea, such as decreased mandibular and maxillary lengths, skeletal retrusion, increased lower facial height and, consequently, increased total anterior facial height, a larger cranio-cervical angle, small posterior airway space and an inferiorly positioned hyoid bone. The diagnosis is based on the clinical history, a physical examination and tests confirming the presence and severity of upper airway obstruction. The gold standard test for diagnosis is overnight polysomnography. Attention must be paid to identify the craniofacial characteristics. When necessary, children should be referred to orthodontists and/or sleep medicine specialists for adequate treatment in addition to undergoing an adenotonsillectomy.

Craniocervical Posture in Patients with Obstructive Sleep Apnea

Abstract Introduction Obstructive Sleep Apnea (OSA) is characterized by repeated episodes of upper airway obstruction during sleep. Objective The objective of this study is to verify the craniofacial characteristics and craniocervical posture of OSA and healthy subjects, determining possible relationships with the apnea/hypopnea index (AHI). Methods This case-control study evaluated 21 subjects with OSA, who comprised the OSA group (OSAG), and 21 healthy subjects, who constituted the control group (CG). Cephalometry analyzed head posture measurements, craniofacial measurements, and air space. Head posture was also assessed by means of photogrammetry. Results The groups were homogeneous regarding gender (12 men and 9 women in each group), age (OSAG = 41.86 11.26 years; GC = 41.19 11.20 years), and body mass index (OSAG = 25.65 2.46 kg/m2; CG = 24.72 3.01 kg/m2). We found significant differences between the groups, with lower average pharyngeal space and greater distance between the hyoid bone and the mandibular plane in OSAG, when compared with CG. A positive correlation was found between higher head hyperextension and head anteriorization, with greater severity of OSA as assessed by AHI. Conclusion OSAG subjects showed changes in craniofacial morphology, with lower average pharyngeal space and greater distance from the hyoid bone to the mandibular plane, as compared with healthy subjects. Moreover, in OSA subjects, the greater the severity of OSA, the greater the head hyperextension and anteriorization.

Orofacial-cervical alterations in individuals with upper airway resistance syndrome / Alteração cérvico-orofacial em indivíduos com síndrome da resistência de via aérea superior

ABSTRACT INTRODUCTION: Studies that assess the upper airways in sleep-related breathing disorders have been performed only in patients with obstructive sleep apnea syndrome who seek medical attention. Therefore, in addition to the need for population studies, there are no data on the orofacial-cervical physical examination in subjects with upper airway resistance syndrome. OBJECTIVES: To compare the orofacial-cervical examination between volunteers with upper airway resistance syndrome and without sleep-related breathing disorders. METHODS: Through questionnaires, physical measurements, polysomnography, and otorhinolaryngological evaluation, this study compared the orofacial-cervical physical examination, through a systematic analysis of the facial skeleton, mouth, throat, and nose, between volunteers with upper airway resistance syndrome and volunteers without sleep-related breathing disorders in a representative sample of the adult population of the city of São Paulo. RESULTS: There were 1042 volunteers evaluated; 49 subjects (5%) were excluded as they did not undergo otorhinolaryngological evaluation, 381 (36%) had apnea-hypopnea index > 5 events/hour, and 131 (13%) had oxyhemoglobin saturation < 90%. Among the remaining 481 subjects (46%), 30 (3%) met the criteria for the upper airway resistance syndrome definition and 53 (5%) met the control group criteria. At the clinical evaluation of nasal symptoms, the upper airway resistance syndrome group had more oropharyngeal dryness (17% vs. 29.6%; p = 0.025) and septal deviation grades 1-3 (49.1% vs. 57.7%; p = 0.025) when compared to controls. In the logistic regression model, it was found that individuals from the upper airway resistance syndrome group had 15.6-fold higher chance of having nose alterations, 11.2-fold higher chance of being hypertensive, and 7.6-fold higher chance of complaining of oropharyngeal dryness when compared to the control group. CONCLUSION: Systematic evaluation of the facial skeleton, mouth, throat, and nose, between volunteers with upper airway resistance syndrome and volunteers without sleep-related breathing disorders, showed that the presence of upper airway resistance syndrome is mainly associated with nasal alterations and oropharyngeal dryness, in addition to the risk of hypertension, regardless of gender and obesity.

Resumo Introdução: Estudos que avaliam a via aérea superior (VAS) nos distúrbios respiratórios relacionados ao sono (DRRS) foram realizadas somente em pacientes com Síndrome da apneia obstrutiva do sono (SAOS) que procuram o atendimento médico. Portanto, além da necessidade de estudos populacionais, não há dados sobre o exame físico cérvico-orofacial em indivíduos com Síndrome de Resistência das Vias Aéreas Superiores (SRVAS). Objetivos: Comparar o exame cérvico orofacial entre voluntário com SRVAS e sem DRRS. Método: Através de questionários, medidas físicas, polissonografia e avaliação otorrino-laringológica comparou-se o exame físico cérvico orofacial, através de uma análise sistemática do esqueleto facial, boca, faringe e nariz, entre voluntários com SRVAS e voluntários sem DRRS em uma amostra representativa da população adulta da cidade de São Paulo. Resultados: Avaliamos 1042 voluntários. Foram excluídos: 49 indivíduos (5%) que não realizaram avaliação otorrinolaringológica; 381 (36%) apresentaram índice de apneia e hipopnéia (IAH) > 5 eventos/hora e 131 (13%) apresentaram saturação da oxihemoglobina < 90%. Entre os 481 voluntários restantes (46%), 30 (3%) preenchiam os critérios estabelecidos para a definição de SRVAS e 53 (5%) que preenchiam os critérios do grupo controle. Na avaliação clínica dos sintomas nasais, o grupo SRVAS apresentou mais ressecamento orofaríngeo (17% vs. 29,6%; p = 0,025), desvio septal grau 1 a 3 (49,1% vs. 57,7%; p = 0,025), comparado ao controle. No modelo de regressão logística observamos que indivíduos do grupo SRVAS apresentaram uma razão de chance 15,6 vezes maior de apresentarem nariz alterado; 11,2 vezes maior de serem hipertensos e 7,6 vezes maior de se queixarem de ressecamento orofaríngeo quando comparados ao grupo controle. Conclusão: A avaliação sistemática do esqueleto facial, boca, faringe e nariz, entre voluntários com SRVAS e voluntários sem DRRS, mostrou que a presença de SRVAS está principalmente associada à alterações nasais e ressecamento orofaríngeo, além do risco de hipertensão arterial, independentemente do gênero e obesidade.

Prevalence of Risk for Obstructive Sleep Apnea Syndrome and Association With Risk Factors in Primary Care / Prevalência de Risco para Síndrome de Apneia Obstrutiva do Sono e Associação com Fatores de Risco na Atenção Primária

Abstract Background: Obstructive sleep apnea syndrome (OSAS) is a chronic, progressive disease with high morbidity and mortality. It is underdiagnosed, especially among women. Objective: To study the prevalence of high risk for OSAS globally and for the Berlin Questionnaire (BQ) categories, and to evaluate the reliability of the BQ use in the population studied. Methods: Observational, cross-sectional study with individuals from the Niterói Family Doctor Program, randomly selected, aged between 45 and 99 years. The visits occurred between August/2011 and December/2012. Variables associated with each BQ category and with high risk for OSAS (global) were included in logistic regression models (p < 0.05). Results: Of the total (616), 403 individuals (65.4%) reported snoring. The prevalence of high risk for OSA was 42.4%, being 49.7% for category I, 10.2% for category II and 77.6% for category III. Conclusion: BQ showed an acceptable reliability after excluding the questions Has anyone noticed that you stop breathing during your sleep? and Have you ever dozed off or fallen asleep while driving?. This should be tested in further studies with samples mostly comprised of women and low educational level individuals. Given the burden of OSAS-related diseases and risks, studies should be conducted to validate new tools and to adapt BQ to better screen OSAS.

Resumo Fundamento: A síndrome da apneia obstrutiva do sono (SAOS) é uma doença crônica, progressiva, com alta morbimortalidade. Encontra-se subdiagnosticada, principalmente entre mulheres. Objetivo: Estudar a prevalência de alto risco para SAOS globalmente e para as categorias do Questionário de Berlim (QB), e avaliar a confiabilidade do uso do QB na população estudada. Métodos: Estudo observacional, transversal de indivíduos cadastrados no Programa Médico de Família de Niterói, selecionados aleatoriamente, com idade entre 45 e 99 anos, com coleta entre agosto/2011 e dezembro/2012. Variáveis associadas com cada uma das categorias do QB e com o alto risco para SAOS (global) (valor p<0,20) foram incluídas em modelos de regressão logística (valor p<0,05). Resultados: Do total (616), 403 (65,4%) indivíduos disseram roncar. A prevalência de alto risco para SAOS foi de 42,4%, sendo de 49,7% para a categoria I, 10,2% para a categoria II e 77,6% para a categoria III. Conclusão: O QB apresentou uma confiabilidade aceitável quando retiradas as perguntas 'alguém notou que você para de respirar quando está dormindo' e 'cochilar/dormir ao volante', o que deve ser testado em estudos com populações com maioria de mulheres e de baixa escolaridade. Dado o peso das doenças e riscos associados à SAOS, seria importante realizar futuras investigações para validar novos instrumentos ou adaptar o QB para melhor rastreamento da SAOS.

Avaliação das alterações nas vias aéreas superiores através de tomografia computadorizada Cone-Beam em pacientes submetidos à cirurgia ortognática de avanço bimaxilar / Three-dimensional upper airway space changes after bimaxillary advancement by Cone-Beam Computed Tomography

Introdução: O descontentamento com a estética facial é considerado o fator motivador mais frequente na procura pela cirurgia ortognática, visto que este é o procedimento indicado nos casos de severas discrepâncias dentoesqueléticas em pacientes adultos. A anatomia das vias aéreas superiores (VAS) permite que fatores como obesidade, hipotonia muscular e deficiência mandibular favoreçam sua obstrução, podendo gerar a Apneia Obstrutiva do Sono (AOS), caracterizada por episódios recorrentes de obstrução parcial ou completa das VAS durante o sono. As cirurgias de avanço bimaxilar estão associadas ao aumento do espaço aéreo, no entanto, as alterações morfológicas e volumétricas ainda não são bem conhecidas. Objetivos: Avaliar as alterações em 3D do espaço aéreo faríngeo frente aos procedimentos de cirurgia ortognática de avanço bimaxilar em pacientes Classe I e II esqueléticos. Material e Métodos: A análise da área axial mínima e do volume da aérea superior foi realizada em pré-operatório (T0) e pós-operatório (T1) de 56 pacientes, sendo 21 do sexo masculino e 35 do sexo feminino, com média de idade de 35,8 (±10,7) anos, submetidos ao avanço bimaxilar pela técnica da osteotomia sagital de mandíbula bilateral associada ao avanço de maxila por meio de osteotomia Le Fort I. As avaliações foram feitas através de tomografia computadorizada Cone-beam, utilizando-se o Programa Dolphin Imaging 11.7. Foi utilizado o teste t pareado para comparar os dados pré e pós-operatórios. Todos os testes foram realizados com o programa Statistica, adotando-se um nível de significância de 5%. Resultados: No estudo do erro do método, não houve erro casual nem sistemático entre a primeira e a segunda medição das variáveis (p >0,05 em todas as medidas). A cirurgia de avanço bimaxilar apresentou uma média de 73,6% (± 74,75%) de aumento volumétrico e 113,5% (±123,87%) de aumento na área axial mínima. Conclusões: Podemos concluir que a cirurgia de avanço bimaxilar proporciona um aumento volumétrico significativo no espaço aéreo superior, bem como na área axial mínima, no entanto, esse ganho nem sempre ocorre na mesma magnitude para todos os pacientes.(AU)

Introduction: Facial aesthetics dissatisfaction is considered the most common motivating factor in the search for orthognathic surgery. This procedure may be used in cases of severe dental and skeletal discrepancies in adult patients. The restricted space anatomy of the upper airway space (UAS) allows features such as obesity, muscular hypotonia and mandibular deficiency favor clogging, which may lead to obstructive sleep apnea (OSA), characterized by recurrent episodes of partial or complete obstruction of the UAS during sleep. Surgeries of bimaxillary advancement are associated with increased UAS, however, the morphological and volumetric changes are not well known. Objectives: to evaluate changes in 3D pharyngeal airway in front of orthognathic surgery procedures of skeletal Class I and II subjects. Material and Methods: 3D pharyngeal airway was evaluated preoperative (T0) and postoperative (T1), with the aid of the analysis of the minimum axial area and airway volume. Fifty-six patients 21 male and 35 female, with a mean age of 35.8 (± 10.7) years undergo bimaxillary advancement by the technique of bilateral sagittal split osteotomy of the mandible associated with maxillary advancement through Le Fort I osteotomy. Measurements were made using Cone-beam Computed Tomography, using the Dolphin Imaging program 11.7. Paired t test was used to compare to the data between T0 and T1. All tests were performed with the Statistica Program, adopting a 5% significance level. Results: In the method error of the study, there was no casual or systematic error between the first and second measurement variables (p > 0.05 for all measures). The bimaxillary advancement surgery showed an average of 73.6% (± 74.75%) of increase in volume and 113.5% (±123.87%) increase in the minimum axial area. Conclusions: We concluded that the maxillomandibular advancement surgery provides a significant increase in volume in the UAS as well as the minimum axial area; however, this gain is not always in the same magnitude for all patients.(AU)

Avaliação das vias aéreas superiores por meio de tomografia computadorizada Cone-beam em pacientes Classe III submetidos à cirurgia bimaxilar / Evaluation of the upper airways by means of Cone-beam computed tomography in Class III patients submitted to bimaxilar surgery

Introdução: Dependendo da magnitude da má oclusão de Classe III, esta é uma alteração difícil de ser tratada apenas com a correção ortodôntica. Tanto as cirurgias de recuo mandibular quanto as bimaxilares promovem uma melhora na oclusão, na função mastigatória e na estética facial, ao corrigirem as posições da mandíbula e/ou maxila, mas um importante aspecto da cirurgia ortognática, que não pode ser negligenciado, são os efeitos que os movimentos esqueléticos das bases ósseas podem provocar na região das vias aéreas, ao alterar a posição do osso hióide e da língua. O estreitamento das vias aéreas superiores (VAS) pode comprometer o sono dos pacientes submetidos à correção cirúrgica e predispor ao desenvolvimento da apneia/hipopneia obstrutiva do sono (AOS). Objetivos: O presente trabalho tem como objetivo avaliar as alterações de volume e área axial mínima do espaço aéreo faringeo em pacientes com má oclusão de Classe III esquelética, submetidos à cirurgia ortognática bimaxilar, pela técnica de osteotomia Le Fort I da maxila e osteotomia sagital bilateral da mandíbula. Material e Métodos: As avaliações foram feitas em tomografias computadorizadas Cone-beam, utilizando-se o Programa Dolphin Imaging 11.7. As tomografias de 50 pacientes, de ambos os sexos, com média de idade de 33,40 (± 9,38) anos, foram analisadas nos períodos pré e pósoperatório e as medidas de volume e área axial mínima foram mensuradas. Foi utilizado o teste t pareado e os testes foram realizados utilizando-se o programa Statistica 7.0, adotando-se um nível de significância de 5%. Resultados: ao calcular o erro do método, não foram encontrados erros casuais e nem sistemáticos (p> 0,05 em todas as medidas). As cirurgias bimaxilares para correção da Classe III esquelética promoveram um aumento de 16,68% (±22,61) no volume e 23,58% (± 31,46) na área axial mínima. Conclusões: Mesmo que os efeitos da cirurgia de avanço maxilar e recuo mandibular sobre as vias aéreas não sejam completamente previsíveis, podemos observar que a maioria dos pacientes não apresentaram prejuízos na anatomia faringeana que resulte em diminuição do volume aéreo e área axial mínima, predispondo-o ao desenvolvimento da AOS.(AU)

Introduction: Depending on the extend of Class III malocclusion, it becomes difficult to be treated only with orthodontic correction. Both mandibular setback surgery as bimaxillary surgery, promote an improvement in occlusion, masticatory function and facial aesthetics, correcting the position of the mandible and/or maxilla. But an important aspect of orthognathic surgery that cant be overlooked, are the effects that the skeletal movements of the bone bases causes in the airway space, since they change the position of the hyoid bone and tongue. The narrowing of the pharingeal airway space (PAS) may impair the patient's sleep and predispose to the development of obstructive sleep apnea (OSA). Purpose: This study aims to evaluate surgical changes in the airway volume and minimal cross-sectional area in the pharyngeal airway space (PAS) in patients with skeletal Class III malocclusion, submitted to bimaxillary surgery, using a Le Fort I maxillary osteotomy and bilateral sagittal split ramus osteotomy technique. Material and Methods: The evaluations were made through Cone-beam computed tomography (CBCT), using Dolphin Imaging program version 11.7. The CT scans of 50 patients of both genders, with a mean age of 33.40 (± 9.38), were analyzed pre and postoperatively and volume and minimum axial area were measured. Paired t test was used and tests were performed using Statistica 7.0 software, adopting a 5% significance level. Results: Method error were done and no random or systematic errors were found (p> 0.05 for all measures). Bimaxillary surgery for skeletal Class III correction promoted an increase of 16.68% (± 22.61) in volume and 23.58% (± 31.46) at the minimum axial area. Conclusion: Even if the effects of the maxillary advancement and mandibular setback surgery on the airway are not completely predictable, we observed that most patients didnt have pharyngeal airway anatomy damage, that could result decreased on airway volume and minimum axial area predisposing to OSA development.(AU)