Most frequent errors in inhalation technique of patients with asthma treated at a tertiary care hospital / Erros mais frequentes na técnica inalatória de pacientes com asma brônquica em tratamento em hospital terciário

ABSTRACT Objective: To demonstrate the most frequent errors in inhalation technique in patients with asthma undergoing treatment at a tertiary care hospital. Methods: A cross-sectional study with a convenience sample of asthma patients aged 18 years or over, treated at a pulmonology outpatient clinic of a tertiary care hospital. The assessment of inhalation technique of users of the dry powder inhalers Aerolizer®, Aerocaps and Diskus®, or metered-dose inhalers was based on the manufacturer's instructions for use of each inhaler device. Patients demonstrated the inhalation technique with empty inhaler devices, and it was considered correct when all stages were performed properly, or when errors probably did not interfere with the treatment outcome. Results: Among 71 participants, 43 (60.5%) performed inhalation technique incorrectly. Among metered-dose inhalers and dry powder inhalers users, inhalation technique errors were found in 84.2% and 51.9%, respectively (p=0.013). Errors were more frequent at the exhalation stage (67.4%), followed by breathing in (58.1%) and apnea (51.2%). In the group using dry powder inhalers, the most common errors occurred during exhalation and, for those using metered-dose inhalers, the most compromised stage was aspiration. Conclusion: Errors were more frequent among those using metered-dose inhalers compared with dry powder inhalers. Misconceptions are more common at the expiration stage among users of dry powder inhalers and in aspiration among those on metered-dose inhalers.

RESUMO Objetivo: Demonstrar os erros mais frequentes na técnica inalatória de pacientes com asma brônquica em tratamento em hospital terciário. Métodos: Estudo transversal, com amostra de conveniência de pacientes com asma, com 18 anos ou mais, em tratamento em ambulatório de pneumologia de um hospital terciário. A avaliação da técnica inalatória dos usuários dos dispositivos de pó seco Aerolizer ®, Aerocaps® ou Diskus®, ou de aerossóis dosimetrados teve como base as orientações da bula do fabricante de cada dispositivo inalatório. Os pacientes demonstraram a técnica inalatória com dispositivos inalatórios vazios, e ela foi considerada correta quando todas as etapas foram realizadas de forma apropriada, ou quando os equívocos provavelmente não interferiam no resultado do tratamento. Resultados: Entre os 71 participantes, 43 (60,5%) realizaram a técnica inalatória de forma incorreta. Dentre os usuários de aerossóis dosimetrados e dispositivos de pó seco, ocorreram erros de técnica inalatória em 84,2% e 51,9%, respectivamente (p=0,013). Os erros foram mais frequentes na etapa da expiração (67,4%), seguidos da aspiração (58,1%) e da apneia (51,2%). No grupo que usava dispositivos de pó seco, os erros mais comuns aconteceram na expiração e, nos que utilizavam aerossóis dosimetrados, a etapa mais comprometida foi a aspiração. Conclusão: Os erros foram mais frequentes entre os que usavam aerossóis dosimetrados em comparação com dispositivos de pó seco. Os equívocos foram mais comuns na etapa da expiração entre os usuários de dispositivos de pó seco e na aspiração entre os que usavam aerossóis dosimetrados.

Incorrect use of inhalation devices among patients with bronchial asthma. A hospital-based cross-sectional study in Rio de Janeiro, Brazil

ABSTRACT CONTEXT AND OBJECTIVE: Treatment of asthma implies inhalation of specific drugs to reach high concentrations in the respiratory tree and ensure low drug bioavailability and few adverse effects. This study aimed to evaluate the effectiveness of the inhalation technique among outpatients with asthma. DESIGN AND SETTING: Tertiary-care hospital-based cross-sectional study in Rio de Janeiro. METHODS: We evaluated inhalation practices in a convenience sample. A questionnaire was used to investigate sociodemographic data and assess disease control level, duration of use of the inhalation device, length of treatment and previous instructions provided by the prescribing physician. Patients demonstrated their inhalation technique using empty devices, and their technique was considered correct when all steps were appropriately performed or when errors did not interfere with the treatment outcome. RESULTS: Among the 71 participants, 53 (74.7%) had been using the same inhaler device for at least two years and 41 (57.8%) had been under treatment for two years or more. Twelve (17.1%) said that they had been taught once and 57 (81.4%) at least twice, while one (1.4%) reported not having received any guidance regarding use of inhaler devices. Eighteen patients (25.3%) presented controlled asthma and 28 (39.5%) performed the inhalation technique correctly. Incorrect technique was associated with fewer evaluations of the inhalation technique (P =0.04) and uncontrolled asthma (P = 0.01). CONCLUSIONS: Less than half of the sample performed the inhalation technique correctly. Incorrect inhalation technique was related to lower number of evaluations of the use of the inhalation device and uncontrolled asthma.

Trends in the Prevalence of Live Macrosomic Newborns According to Gestational Age Strata, in Brazil, 2001-2010, and 2012-2014 / Tendências na prevalência de recém-nascidos vivos macrossômicos, estratificadas por idade gestacional, Brasil, 2001-2010 e 2012-2014

Abstract Purpose To describe the trends in the prevalence of macrosomia (birth weight ± 4,000 g) according to gestational age in Brazil in the periods of 2001-2010 and 2012-2014. Methods Ecological study with data from the Brazilian Live Birth Information System (SINASC, in the Portuguese acronym) regarding singleton live newborns born from 22 gestational weeks. The trends in Brazil as a whole and in each of its five regions were analyzed according to preterm (22-36 gestational weeks) and term (37-42 gestational weeks) strata. Annual Percent Changes (APCs) based on the Prais-Winsten method and their respective 95% confidence intervals (CIs) were used to verify statistically significant changes in 2001-2010. Results In Brazil, the prevalence of macrosomic births was of 5.3% (2001-2010) and 5.1% (2012-2014). The rates were systematically higher in the North and Northeast Regions both in the preterm and in term strata. In the preterm stratum, the North Region presented the highest variation in the prevalence of macrosomia (+137.5%) when comparing 2001 (0.8%) to 2010 (1.9%). In the term stratum, downward trends were observed in Brazil as a whole and in every region. The trends for 2012-2014 were more heterogeneous, with the prevalence systematically higher than that observed for 2001-2010. The APC in the preterm stratum (2001-2010) showed a statistically significant trend change in the North (APC: 15.4%; 95%CI: 0.6-32.3) and South (APC: 13.5%; 95%CI: 4.8-22.9) regions. In the term stratum, the change occurred only in the North region (APC:-1.5%; 95%CI: -2.5--0.5). Conclusion The prevalence of macrosomic births in Brazil was higher than 5.0%. Macrosomia has potentially negative health implications for both children and adults, and deserves close attention in the public health agenda in Brazil, as well as further support for investigation and intervention.

Resumo Objetivo Descrever tendências nas prevalências de macrossomia (peso ao nascer ± 4.000 g) segundo idade gestacional no Brasil em 2001-2010 e em 2012-2014. Métodos Estudo ecológico com dados do Sistema de Informação sobre Nascidos Vivos (SINASC), incluindo bebês nascidos vivos a partir de 22 semanas, de gestações únicas. As tendências no Brasil como umtodo e nas suas cinco regiões foramanalisadas nos estratos pré-termo (22-36 semanas de gestação) e termo (37-42 semanas de gestação). Mudanças percentuais anuais (APCs) baseadas nos modelos de regressão propostos por Prais-Winsten e intervalos de confiança (ICs) de 95% foram calculados para verificar diferenças estatisticamente significantes no período 2001-2010. Resultados No Brasil, a prevalência de macrossomia foi de 5,3% (2001-2010) e 5,1% (2012-2014). As frequências foram sistematicamente maiores nas regiões Norte e Nordeste, tanto no pré-termo quanto no termo. No pré-termo, a região Norte apresentou a variação mais importante na prevalência de macrossomia (+137,5%) quando comparados o ano de 2001 (0,8%) e o de 2010 (1,9%). No termo, tendências declinantes foram observadas no Brasil e em todas as suas regiões. As tendências em 2012-2014 foram mais heterogêneas, com frequências maiores do que aquelas observadas em 2001-2010. As APCs no estrato pré-termo (2001-2010) mostraram que as mudanças foram estatisticamente significantes no Norte (APC: 15,4%; IC95%: 0,6-32,3) e no Sul (APC: 13,5%; IC95%: 4,8-22,9). No termo, a mudança ocorreu apenas no Norte (APC: -1,5%; IC95%: -2,5--0,5). Conclusão A prevalência de macrossomia no Brasil foi maior do que 5,0%. A macrossomia tem implicações potencialmente negativas para a saúde da criança e do adulto, e merece mais atenção das políticas de saúde pública no Brasil, bem como mais apoio para investigação e intervenção.