Association between nasal patency and orofacial myofunctional changes in patients with asthma and rhinitis.

PURPOSE: To verify the association between orofacial myofunctional changes and nasal patency. METHOD: Observational study of 43 children and adolescents with asthma and/or rhinitis, aged between 5 and 14 years, from May 2017 to September 2019. Patients underwent peak nasal inspiratory flow (PNIF) for nasal patency assessment and orofacial myofunctional assessment. Clinical data were obtained from an interview on the day of the patients' medical evaluation. The relationship between orofacial myofunctional changes and PNIF was analyzed using a logistic regression model. Estimates were reported as odds ratio (OR) and 95% confidence interval (95%CI). We evaluated multicollinearity using the variance inflation factor and analyzed the adjusted fit with the Akaike information criterion and McFadden's R2 metric; p value < 0.05 was considered statistically significant. RESULTS: Inadequate positioning of the mandible (OR = 11.22; 95%CI 1.83-69; p = 0.009) and the presence of tension in the facial muscles during the swallowing of liquid (OR = 4.61; 95%CI 1.31-16.20; p = 0.017) were associated with altered PNIF in children and adolescents with asthma and rhinitis. CONCLUSION: Children and adolescents with asthma and rhinitis along with reduced nasal patency presented orofacial myofunctional changes, such as inadequate positioning of the jaw and the presence of tension in the facial muscles during swallowing of liquid.

Respiratory muscle strength and pulmonary function in children with rhinitis and asthma after a six-minute walk test.

OBJECTIVE: Rhinitis and asthma decrease quality of life. Few studies have assessed the performance of children with asthma or rhinitis under submaximal exercise. We evaluated maximal respiratory pressures, spirometric parameters, and ability to sustain submaximal exercise in these children before and after the 6-minute walk test (6MWT), compared to healthy children. METHODS: This cross-sectional, analytical study included 89 children aged 6-12 years in outpatient follow-up: 27 healthy (H), 31 with rhinitis (R), and 31 with mild asthma under control (A). Pulmonary function parameters and maximal respiratory pressures were measured before and 5, 10, and 30 minutes after the 6MWT. Wilcoxon test was used to compare numerical numerical variables between two groups and analysis of variance or Kruskal-Wallis test for comparison among three groups. RESULTS: Total distance traveled in the 6MWT was similar among the three groups. Compared to pre-test values, VEF1 (Forced Expiratory Volume in 1 second), VEF0.75 (Forced Expiratory Volume in 0.75 second), and FEF25-75 (Forced Expiratory Flow 25-75% of the Forced Vital Capacity - CVF - curve) decreased significantly after the 6MWT in group A, and VEF0.75, FEF25-75, and VEF1/CVF decreased significantly in group R. Groups A and R had lower Maximum Inspiratory Pressure values than group H before and after the 6MWT at all time points assessed. CONCLUSIONS: The findings suggest that children with rhinitis and mild asthma present with alterations in respiratory muscle strength and pulmonary function not associated with clinical complaints, reinforcing the concept of the united airways.

Weight gain in the first two years of life, asthma and atopy: the SCAALA cohort study.

OBJECTIVE: To evaluate the association between weight gain in the first two years of life and the occurrence of wheezing, asthma, serum IgE, skin reactivity and pulmonary function. DESIGN: Cohort study. SETTING: The metropolitan region of Salvador, Bahia, Brazil. SUBJECTS: The association was studied between 1997 and 2005 in 669 children up to 11 years of age. Data were collected on asthma and risk factors, both current factors and those present in the first years of life. Weight gain was considered fast when the Z-score was >0·67. Poisson regression was used in the multivariate statistical analysis. RESULTS: Wheezing was reported in 25·6 % of the children. Weight gain was considered fast (Z-score >0·67) in 29·6 % of the children and slow (Z-score <-0·67) in 13·9 %. Children in the slow weight gain group had 36 % fewer symptoms of asthma (prevalence ratio = 0·65; 95 % CI 0·42, 0·99). CONCLUSIONS: Slower weight gain in the early years of life may constitute a protective factor against symptoms of asthma. The relevance of this finding for public health is not yet certain, since it is known that children with slow and fast weight gain may be more likely to develop adverse health consequences related to both these situations.

Association between deleterious oral habits and asthma in children: a systematic review and meta-analysis.

Deleterious oral habits (DOH) have been described as a common finding in pediatric series. Studies have investigated their association with local and systemic health problems. In this study, the association between DOH and asthma was investigated. PubMed, Scopus, Lilacs, Web of Science, Google Scholar, and OpenThesis were accessed to identify observational studies that evaluated the association between DOH (thumb sucking, pacifier use, onychophagia or nail biting, bottle feeding) and asthma in children aged 2-17 years. Information on DOH was obtained from the verbal report of the children's parents. Asthma diagnosis was performed by a physician or using the International Study of Asthma and Allergies in Childhood (ISAAC) questionnaire. We used a random-effects model to pool the results. The odds ratio (OR) was used as measure of association between DOH and asthma. The National Institutes of Health Quality Assessment Tool for Observational Cohort and Cross-Sectional Studies was used to assess risk of bias. The GRADE approach was used to assess the quality of evidence. Five studies were included and data from 18,733 children aged 2 to 13 years were analyzed. We found an association between bottle feeding and asthma (OR = 1.25; 95%CI 1.13-1.38; p < 0.001) with moderate level of certainty. Despite the association between pacifier use and asthma (OR = 1.11; 95%CI 1.00-1.24; p = 0.05), the quality of evidence was low. Only one study provided data on nail biting and thumb-sucking, and the individual results showed no association between these habits and asthma. This meta-analysis found an association between bottle feeding, pacifier use, and asthma in children.

Overweight, asthma symptoms, atopy and pulmonary function in children of 4-12 years of age: findings from the SCAALA cohort in Salvador, Bahia, Brazil.

OBJECTIVE: To evaluate the association between overweight and the occurrence of asthma and atopy in a cohort of children of 4-12 years of age living in the city of Salvador in 2005. DESIGN: Cross-sectional study nested in a cohort. SETTING: The metropolitan region of Salvador, Bahia, Brazil. SUBJECTS: The study included 1129 children of 4-12 years age who presented complete information on the variables used here. Skin tests for allergy, spirometry, faecal parasitology, serum IgE and anthropometric surveys were conducted. Poisson's multivariate regression was adopted. RESULTS: Wheezing was found in 29·1% and asthma in 22·8% of children, both conditions being more common in those under 6 years of age and 34% more common in overweight children (prevalence ratio (PR) = 1·34; 95% CI 1·07, 1·67) following adjustment. The ratio between forced expiratory volume in 1s and forced vital capacity was associated with overweight (PR = 1·35; 95% CI 1·11, 1·61). No statistically significant association was found between overweight and allergen-specific IgE or with wheezing. CONCLUSIONS: These results are in agreement with the hypothesis that overweight is associated with asthma and pulmonary function, even following adjustment for intervening variables known to be associated with the pathogeny of asthma.

Telehealth in audiology: an integrative review.

We performed an integrative review on the scientific literature about the use of telehealth in audiology care. Through high criteria search of published studies on the "Biblioteca Virtual em Saúde" - Virtual Health Library, PubMed, and Scientific Electronic Library Online databases, nine articles were selected. It was possible to verify that the use of telehealth in audiology is feasible and efficient, because it could promote audiological care for patients from away places. This process reaches more patients and communities by breaking down geographic barriers, and it offers a specific service not available with less cost and more quickly when compared with traditional speech therapy care.

Asthma cases in childhood attributed to atopy in tropical area in Brazil.

OBJECTIVE: This study aimed to explore the association between asthma and atopy in a cohort of children living in a large urban center in Brazil. Atopy was defined by the presence of allergen-specific IgE in serum or by a positive skin prick test. METHODS: In a sample of 1 445 Brazilian children, the association between the prevalence of asthma, skin prick test positivity, and allergen-specific IgE in serum was investigated. RESULTS: The prevalence of asthma was 22.6%. The presence of serum allergen-specific IgE was frequent in asthmatics and nonasthmatics, and the prevalence of asthma increased only with levels of allergen-specific IgE > 3.5 kilounits/L. The proportion of asthma attributable to atopy was estimated to be 24.5% when atopy was defined by the presence of allergen-specific IgE. With a given level of specific IgE, no association between skin test reactivity and asthma was observed. Skin prick tests were less sensitive than specific IgE for detection of atopy. CONCLUSIONS: Most asthma cases in an urban underprivileged setting in Brazil were not attributable to atopy. This observation has important implications for understanding the risk factors for the asthma epidemic in Latin America.

Evidence of orofacial myofunctional therapy patients with asthma and rhinitis: a systematic review.

PURPOSE: to evaluate the efficacy of orofacial myofunctional therapy in improving orofacial function and nasal breathing in patients with asthma and rhinitis and, consequently, achieve clinical control of these conditions. RESEARCH STRATEGIES: We used the elements of the PICOT method (study population, intervention, comparison, outcomes and type of studies) to define the eligibility criteria: (1) Population: patients with asthma and rhinitis; (2) Intervention: orofacial myofunctional therapy to improve chewing, swallowing, and breathing; (3) Comparison: control group without orofacial myofunctional therapy; (4) Predefined outcomes: clinical control of asthma and improvement of orofacial functions and nasal breathing; (5) Study type: clinical trials. The data were collected from PubMed, SCOPUS, Web of Science, Science Direct, LILACS, Google Scholar, Cochrane Central Register of Controlled Trials (CENTRAL), OATD, and Open Thesis, in November 2018. SELECTION CRITERIA: Randomized controlled trials published in full-text versions without language restriction, no filter was used. DATA ANALYSIS: Demographic characteristics of study participants, specific diagnosis of asthma and control medication, type, duration, intensity and follow-up of orofacial myofunctional therapy, and outcome data. The risk of bias was assessed according to the Cochrane guidelines for clinical trials. RESULTS: One study met the eligibility criteria: although the study has shown an improvement of functional control and clinical scores of asthma, the evidence is very low. CONCLUSION: There is no scientific evidence on the efficacy of orofacial myofunctional therapy in improving clinical control, orofacial function, and nasal breathing in patients with asthma and rhinitis.

Association between deleterious oral habits and asthma in children: a systematic review and meta-analysis

Abstract: Deleterious oral habits (DOH) have been described as a common finding in pediatric series. Studies have investigated their association with local and systemic health problems. In this study, the association between DOH and asthma was investigated. PubMed, Scopus, Lilacs, Web of Science, Google Scholar, and OpenThesis were accessed to identify observational studies that evaluated the association between DOH (thumb sucking, pacifier use, onychophagia or nail biting, bottle feeding) and asthma in children aged 2-17 years. Information on DOH was obtained from the verbal report of the children's parents. Asthma diagnosis was performed by a physician or using the International Study of Asthma and Allergies in Childhood (ISAAC) questionnaire. We used a random-effects model to pool the results. The odds ratio (OR) was used as measure of association between DOH and asthma. The National Institutes of Health Quality Assessment Tool for Observational Cohort and Cross-Sectional Studies was used to assess risk of bias. The GRADE approach was used to assess the quality of evidence. Five studies were included and data from 18,733 children aged 2 to 13 years were analyzed. We found an association between bottle feeding and asthma (OR = 1.25; 95%CI 1.13-1.38; p < 0.001) with moderate level of certainty. Despite the association between pacifier use and asthma (OR = 1.11; 95%CI 1.00-1.24; p = 0.05), the quality of evidence was low. Only one study provided data on nail biting and thumb-sucking, and the individual results showed no association between these habits and asthma. This meta-analysis found an association between bottle feeding, pacifier use, and asthma in children.

A telemedicina aplicada à cirurgia plástica: uma revisão integrativa / Telemedicine applied to plastic surgery: an integrative review

Introdução: A telemedicina refere-se à prestação de serviços médicos pelo uso da tecnologia da informação e comunicação entre pacientes e prestadores de serviços. A cirurgia plástica é um campo especialmente favorável à aplicação da telemedicina, dado que a inspeção visual do paciente orienta tanto o diagnóstico como o acompanhamento clínico. Métodos: Foi realizada revisão integrativa nos artigos publicados em telemedicina em cirurgia plástica na base de dados PubMed, utilizando os termos MeSH: "telemedicine" AND "plastic surgery". Após rastreamento e aplicação de critérios de elegibilidade, o texto completo dos artigos remanescentes foi digitalizado, com seus dados extraídos para análise detalhada. Resultados: Foram identificados 134 artigos, todos em inglês, na busca inicial no PubMed. Após rastreamento e aplicação dos critérios de exclusão, foram incluídos 12 estudos para a revisão integrativa. Os artigos encontrados nesta revisão demonstraram benefícios na utilização da telemedicina aplicada à cirurgia plástica, de forma mais pronunciada no acompanhamento pósoperatório dos pacientes, redução ou extinção da necessidade de visitas presenciais, satisfação dos pacientes nas consultas realizadas por telemedicina, redução de custos financeiros, redução de tempo de resposta para referências, acurácia diagnóstica semelhante à avaliação presencial e melhoria ao acesso de cuidado especializado a lugares remotos, tanto geográfica quanto socialmente desfavoráveis. Quatro artigos discutiram barreiras e limitações, observadas ou potenciais, ao uso da telemedicina na cirurgia plástica, como: segurança dos dados, legislação, custos e percepção de influência negativa na comunicação médico-paciente. Conclusão: Os estudos analisados demonstram ganho expressivo nos conhecimentos acerca da telemedicina aplicada à cirurgia plástica nos últimos anos.

Introduction: Telemedicine refers to providing medical services through information technology and communication between patients and service providers. Plastic surgery is a field especially favorable to the application of telemedicine since visual inspection of the patient guides both diagnosis and clinical follow-up. Methods: An integrative review was performed in the articles published in telemedicine in plastic surgery in the PubMed database, using the terms MeSH: "telemedicine" AND "plastic surgery." After tracking and applying eligibility criteria, the remaining articles' full text were digitized, with their data extracted for detailed analysis. Results: A total of 134 articles were identified, all in English, in the initial search for PubMed. After screening and application of the exclusion criteria, 12 studies were included for the integrative review. The articles found in this review demonstrated benefits in the use of telemedicine applied to plastic surgery. Especially in the postoperative follow-up of patients, in the reduction or extinction of the need for face-to-face visits, in the satisfaction of patients in the consultations carried out by telemedicine, in the reduction of financial costs and response time for referrals, in the diagnostic accuracy similar to the face-to-face assessment and in improving access to specialized care in remote places, both geographically and socially unfavorable. Four articles discussed barriers and limitations, observed or potential, to the use of telemedicine in plastic surgery, such as data security, legislation, costs and perception of negative influence on doctor-patient communication. Conclusion: The analyzed studies show an expressive gain in knowledge about telemedicine applied to plastic surgery in recent years.

Perfil clínico-laboratorial de pacientes hospitalizados acometidos por lesão por pressão / Clinical and laboratory profile of hospitalized patients affected by pressure injury

Objetivo: Caracterizar o perfil clínico-laboratorial de pacientes hospitalizados acometidos por lesão por pressão (LP). Método: Estudo retrospectivo e descritivo, que incluiu dados de prontuários eletrônicos de 95 pacientes acometidos por LP durante a hospitalização. Resultados: Houve predomínio do sexo feminino (52,6%), média de idade 74,8 ± 14 anos, tempo médio de internação foi de 76,9 ± 88,8 dias. A maioria esteve internada na unidade de terapia intensiva, com uma média de 17,86 ± 36,58 dias. Com relação à condição clínica, 60% estavam em uso de ventilador mecânico quando desenvolveram a LP, 37,9% tinham a necessidade de hemodiálise, 30,4% foram diagnosticados com algum grau de desnutrição energético-proteica e 54,7% evoluíram para o óbito. As comorbidades mais frequentes foram hipertensão (63,16%), diabetes (43,16%) e neuropatia (33,68%). Quanto ao perfil laboratorial, hipoalbuminemia (97,3%), hiperglicemia (87,8%), anemia (84,4%) e hiperuremia (78,9%) estiveram presentes em mais de dois terços da amostra. Conclusão: Este estudo permitiu conhecer o perfil de pacientes acometidos por LP durante internação hospitalar, o que pode servir de base para desenvolver ações preventivas eficazes embasadas cientificamente.

Prática segura de audiologistas durante a pandemia de SARS-CoV-2 no Brasil / Safe practice of audiologists during the SARS-CoV-2 pandemic in Brazil

RESUMO A doença de coronavírus (COVID-19) é causada pela síndrome respiratória aguda grave coronavírus 2 (SARS-CoV-2). O vírus é transmitido, principalmente, por gotículas, espirros e aerossóis e pode ser transmitido mesmo entre pacientes assintomáticos, havendo risco de contágio durante os procedimentos do audiologista, que utiliza e reutiliza equipamentos clínicos em uma ampla variedade de pacientes. Este artigo teve como objetivo descrever as etapas que podem ser adotadas pelos audiologistas para diminuir o risco de contaminação cruzada na prática clínica, durante a pandemia de SARS-CoV-2. Recomenda-se, portanto, a esses profissionais, o uso de equipamentos de proteção individual, incluindo respiradores N95, luvas de procedimento, protetores para calçados descartáveis, protetores faciais ou óculos de segurança, gorros e aventais descartáveis, além de seguir, rigorosamente, os protocolos de biossegurança durante os cuidados audiológicos.

ABSTRACT Coronavirus disease (COVID-19) is caused by severe acute respiratory syndrome coronavirus 2 (SARS-COV2). This virus is transmitted mainly by droplets, sneezes and aerosols and can be transmitted even among asymptomatic patients, so there is a risk of transmission during the audiologist's procedures which, in addition, use and reuse clinical equipment in a wide variety of patients. This article aims to describe the steps that can be taken by the audiologist in order to decrease the risk of cross-contamination in clinical practice during the SARS-CoV-2 pandemic in Brazil. During the COVID-19 pandemic, audiologists are recommended to use personal protective equipment including N95 respirators, clinical gloves, disposable shoe covers, face shields or safety glasses, hair covers and disposable aprons, in addition to strictly following biosafety protocols during audiological care.

Evidence of orofacial myofunctional therapy patients with asthma and rhinitis: a systematic review / Evidência da terapia miofuncional orofacial em pacientes com asma e rinite: Uma revisão sistemática

ABSTRACT Purpose to evaluate the efficacy of orofacial myofunctional therapy in improving orofacial function and nasal breathing in patients with asthma and rhinitis and, consequently, achieve clinical control of these conditions. Research strategies We used the elements of the PICOT method (study population, intervention, comparison, outcomes and type of studies) to define the eligibility criteria: (1) Population: patients with asthma and rhinitis; (2) Intervention: orofacial myofunctional therapy to improve chewing, swallowing, and breathing; (3) Comparison: control group without orofacial myofunctional therapy; (4) Predefined outcomes: clinical control of asthma and improvement of orofacial functions and nasal breathing; (5) Study type: clinical trials. The data were collected from PubMed, SCOPUS, Web of Science, Science Direct, LILACS, Google Scholar, Cochrane Central Register of Controlled Trials (CENTRAL), OATD, and Open Thesis, in November 2018. Selection criteria Randomized controlled trials published in full-text versions without language restriction, no filter was used. Data analysis Demographic characteristics of study participants, specific diagnosis of asthma and control medication, type, duration, intensity and follow-up of orofacial myofunctional therapy, and outcome data. The risk of bias was assessed according to the Cochrane guidelines for clinical trials. Results One study met the eligibility criteria: although the study has shown an improvement of functional control and clinical scores of asthma, the evidence is very low. Conclusion There is no scientific evidence on the efficacy of orofacial myofunctional therapy in improving clinical control, orofacial function, and nasal breathing in patients with asthma and rhinitis.

RESUMO Objetivo avaliar a eficácia da terapia miofuncional orofacial na melhora das funções orofaciais, na respiração nasal em pacientes com asma e rinite e, consequentemente, alcançar o controle clínico das doenças. Estratégia de pesquisa Utilizamos a estratégia PICOT (população, intervenção, comparação, resultado e tipo de estudo) para definir os critérios de elegibilidade: (1) População: pacientes com asma e rinite; (2) Intervenção: terapia miofuncional orofacial, para melhora da mastigação, deglutição e respiração; (3) Comparação: grupo controle sem terapia miofuncional orofacial; (4) Desfechos pré-definidos: controle clínico da asma e melhora das funções orofaciais e respiração nasal; (5) Tipo de estudo: ensaios clínicos. Os dados foram coletados no PubMed, SCOPUS, Web of Science, Science Direct, LILACS, Google Scholar, Cochrane Central Register de Ensaios Controlados (CENTRAL), OATD, Open thesis, Novembro de 2018. Critérios de seleção Ensaios controlados randomizados publicados em versões de texto completo, sem restrição de idioma, nenhum filtro foi utilizado. Análise dos dados Foram avaliadas as características demográficas dos participantes do estudo, diagnóstico específico de asma e medicação de controle, tipo, duração, intensidade, acompanhamento da terapia miofuncional orofacial e dados do desfecho. O risco de viés foi avaliado de acordo com as diretrizes da Cochrane para ensaios clínicos. Resultados Um estudo atendeu aos critérios de elegibilidade. Embora o estudo tenha mostrado melhora do controle funcional e escores clínicos da asma, as evidências são baixas. Conclusão Não há evidências científicas sobre a eficácia da terapia miofuncional orofacial na melhora do controle clínico, funções orofaciais e respiração nasal em pacientes com asma e rinite.

Distribuição da gravidade da asma na infância / Distribution of severity of asthma in childhood

OBJETIVO: Estimar a distribuição dos padrões de gravidade da asma em uma amostra populacional de crianças em Salvador (BA). MÉTODOS: Questionário epidemiológico (International Study of Asthma and Allergies in Childhood - ISAAC) foi aplicado juntamente com questionário elaborado com base em critérios de gravidade adotados na prática clínica (Global Initiative for Asthma - GINA) em 417 crianças de 5 a 12 anos com sintomas de asma nos últimos 12 meses. Com base nas questões do ISAAC, as crianças foram classificadas em asma grave e não grave. De acordo com os critérios clínicos da GINA, quatro categorias de gravidade foram criadas: intermitente, persistente leve, persistente moderada e grave. RESULTADOS: Noventa crianças (22,3 por cento) apresentaram indicadores de gravidade segundo o ISAAC. Com base nos critérios da GINA, havia 143 crianças com asma intermitente, 160 com asma leve persistente, 51 com asma moderada e 43 com asma grave. A concordância entre os dois questionários foi de 81,3 por cento, com índice kappa de 0,5. CONCLUSÕES: A maioria das crianças asmáticas em Salvador possui asma persistente. Há bom nível de concordância na identificação da asma grave, entre a classificação epidemiológica e a clínica.

OBJECTIVE: To estimate the distribution of asthma severity in a population-based sample of children from Salvador, Brazil. METHODS: An epidemiologically oriented questionnaire (International Study of Asthma and Allergies in Childhood, ISAAC) and a questionnaire based on criteria used in clinical practice (The Global Initiative for Asthma, GINA) were administered simultaneously to 417 children aged 5 to 12 years who reported symptoms of asthma in the past 12 months. According to the ISAAC instrument, children were classified into severe and non-severe asthma, whereas GINA clinical criteria produced four categories of severity: intermittent, mild persistent, moderate persistent and severe asthma. RESULTS: Ninety children reported symptoms indicative of severity according to the ISAAC questionnaire. According to GINA criteria, 143 children had intermittent asthma, 160 mild persistent, 51 moderate and 43 severe asthma. Agreement between the two instruments was 81.3 percent (kappa = 0.5). CONCLUSIONS: Most asthmatic children in the Salvador urban area have persistent asthma. Agreement between epidemiological and clinical classifications of asthma severity was satisfactory.

Asthma cases in childhood attributed to atopy in tropical area in Brazil / Asma infantil atribuida a atopia en la zona tropical de Brasil

OBJECTIVE: This study aimed to explore the association between asthma and atopy in a cohort of children living in a large urban center in Brazil. Atopy was defined by the presence of allergen-specific IgE in serum or by a positive skin prick test. METHODS: In a sample of 1 445 Brazilian children, the association between the prevalence of asthma, skin prick test positivity, and allergen-specific IgE in serum was investigated. RESULTS: The prevalence of asthma was 22.6 percent. The presence of serum allergen-specific IgE was frequent in asthmatics and nonasthmatics, and the prevalence of asthma increased only with levels of allergen-specific IgE > 3.5 kilounits/L. The proportion of asthma attributable to atopy was estimated to be 24.5 percent when atopy was defined by the presence of allergen-specific IgE. With a given level of specific IgE, no association between skin test reactivity and asthma was observed. Skin prick tests were less sensitive than specific IgE for detection of atopy. CONCLUSIONS: Most asthma cases in an urban underprivileged setting in Brazil were not attributable to atopy. This observation has important implications for understanding the risk factors for the asthma epidemic in Latin America.

OBJETIVO: Explorar la relación entre el asma y la atopia en una cohorte de niños que viven en un gran centro urbano de Brasil. En este estudio, se considera atopia la detección de IgE sérica específica de algún alérgeno o un resultado positivo a la prueba de punción cutánea. MÉTODOS: Se estudió la relación entre la prevalencia del asma, el resultado positivo a la prueba de punción cutánea y la detección de IgE sérica específica de algún alérgeno en una muestra de 1 445 niños brasileños. RESULTADOS: El asma registró una prevalencia de 22,6 por ciento. La presencia de IgE séricas específicas de alérgenos fue frecuente tanto en los asmáticos como en los no asmáticos, y la prevalencia del asma fue mayor solo cuando el valor detectado de la IgE específica del alérgeno era > 3,5 kilounidades/litro. Se calculó que la atopia definida como la detección de IgE específicas de alérgenos es responsable de 24,5 por ciento de los casos de asma. No se observó ninguna relación entre la reactividad a la prueba de punción cutánea y el asma en función de los valores de IgE específicas. La prueba de punción cutánea es menos sensible que la detección de IgE específicas en lo que respecta al diagnóstico de atopia. CONCLUSIONES: La mayoría de los casos de asma que se registran en entornos urbanos desfavorecidos de Brasil no son atribuibles a atopia. Esta observación tiene implicaciones importantes en lo que respecta a la comprensión de los factores de riesgo que predisponen a la epidemia de asma en América Latina.

Distribuição do infiltrado inflamatório em parênquima pulmonar periférico e vias aéreas na asma fatal / Inflammatory cell distribution in alveolar tissue and airways in fatal asthma

A densidade de eosinófilos, mastócitos, neutrófilos e linfócitos foi determinada no parênquima pulmonar e nas vias aéreas de 20 pacientes com asma fatal e 10 controles. Asmáticos mostraram: maior densidade de eosinófilos em todas as regiões das vias aéreas e do parênquima pulmonar; aumento de mastócitos nas vias aéreas e no parênquima peribronquiolar; aumento de linfócitos nas vias aéreas e de neutrófilos no parênquima peribronquiolar. Concluímos que na asma fatal: o infiltrado eosinofílico apresenta uma distribuição difusa; o infiltrado linfocitário não atinge parênquima pulmonar; o parênquima pulmonar participa do processo inflamatório através do aumento de mastócitos, neutrófilos e eosinófilos / Eosinophil, neutrophil, mast cell and lymphocyte content was determined in large and small airways and in lung parenchyma of 20 patients with fatal asthma and 10 controls. Patients with fatal asthma presented: higher eosinophil density in all studied areas, higher mast cell content in airways and in peribronchiolar parenchyma; higher lymphocyte content in intrapulmonary airways; and increased neutrophil content in peribronchiolar parenchyma. We conclude that in fatal asthma: eosinophils present a widespread distribution within the respiratory tract; lymphocyte content is limited to the airways; and alveolar inflammation in fatal asthma is composed by mast cells, neutrophils and eosinophils...