Effectiveness of the Mobile Emergency Medical Services (SAMU): use of interrupted time series.

OBJECTIVE: To evaluate the performance of the Mobile Emergency Medical Services (SAMU) in the ABC Region, using myocardial infarction as tracer condition. METHODS: The analysis of interrupted time series was the approach chosen to test immediate and gradual effects of the intervention on the study population. The research comprised adjusted monthly time series of the hospital mortality rate by myocardial infarction in the period between 2000 and 2011. Data were extracted from the Mortality Information System (SIM), using segmented regression analysis to evaluate the level and trend of the intervention before and after its implementation. To strengthen the internal validity of the study, a control region was included. RESULTS: The analysis of interrupted time series showed a reduction of 0.04 deaths per 100,000 inhabitants in the mortality rate compared to the underlying trend since the implementation of the Emergency Medical Services (p = 0.0040; 95%CI: -0.0816 - -0.0162) and a reduction in the level of 2.89 deaths per 100,000 inhabitants (p = 0.0001; 95%CI: -4.3293 - -1.4623), both with statistical significance. Regarding the control region, Baixada Santista, the difference in the result trend between intervention outcome and post-intervention control of -0.0639 deaths per 100,000 inhabitants was statistically significant (p = 0.0031; 95%CI: -0.1060 - -0.0219). We cannot exclude confounders, but we limited their presence in the study by including control region series. CONCLUSIONS: Although the analysis of interrupted time series has limitations, this modeling can be useful for analyzing the performance of policies and programs. Even though the intervention studied is not a condition that in itself implies effectiveness, the latter would not be present without the former, which, integrated with other conditions, generates a positive result. SAMU is a strategy that must be expanded when formulating and consolidating policies focusing on emergency care.

Impact of long-stay beds on the performance of a tertiary hospital in emergencies.

OBJECTIVE: To assess the impact of implementing long-stay beds for patients of low complexity and high dependency in small hospitals on the performance of an emergency referral tertiary hospital. METHODS: For this longitudinal study, we identified hospitals in three municipalities of a regional department of health covered by tertiary care that supplied 10 long-stay beds each. Patients were transferred to hospitals in those municipalities based on a specific protocol. The outcome of transferred patients was obtained by daily monitoring. Confounding factors were adjusted by Cox logistic and semiparametric regression. RESULTS: Between September 1, 2013 and September 30, 2014, 97 patients were transferred, 72.1% male, with a mean age of 60.5 years (SD = 1.9), for which 108 transfers were performed. Of these patients, 41.7% died, 33.3% were discharged, 15.7% returned to tertiary care, and only 9.3% tertiary remained hospitalized until the end of the analysis period. We estimated the Charlson comorbidity index - 0 (n = 28 [25.9%]), 1 (n = 31 [56.5%]) and ≥ 2 (n = 19 [17.5%]) - the only variable that increased the chance of death or return to the tertiary hospital (Odds Ratio = 2.4; 95%CI 1.3;4.4). The length of stay in long-stay beds was 4,253 patient days, which would represent 607 patients at the tertiary hospital, considering the average hospital stay of seven days. The tertiary hospital increased the number of patients treated in 50.0% for Intensive Care, 66.0% for Neurology and 9.3% in total. Patients stayed in long-stay beds mainly in the first 30 (50.0%) and 60 (75.0%) days. CONCLUSIONS: Implementing long-stay beds increased the number of patients treated in tertiary care, both in general and in system bottleneck areas such as Neurology and Intensive Care. The Charlson index of comorbidity is associated with the chance of patient death or return to tertiary care, even when adjusted for possible confounding factors.

Impact of long-stay beds on the performance of a tertiary hospital in emergencies / Impacto de leitos de longa permanência no desempenho de hospital terciário em emergências

ABSTRACT OBJECTIVE To assess the impact of implementing long-stay beds for patients of low complexity and high dependency in small hospitals on the performance of an emergency referral tertiary hospital. METHODS For this longitudinal study, we identified hospitals in three municipalities of a regional department of health covered by tertiary care that supplied 10 long-stay beds each. Patients were transferred to hospitals in those municipalities based on a specific protocol. The outcome of transferred patients was obtained by daily monitoring. Confounding factors were adjusted by Cox logistic and semiparametric regression. RESULTS Between September 1, 2013 and September 30, 2014, 97 patients were transferred, 72.1% male, with a mean age of 60.5 years (SD = 1.9), for which 108 transfers were performed. Of these patients, 41.7% died, 33.3% were discharged, 15.7% returned to tertiary care, and only 9.3% tertiary remained hospitalized until the end of the analysis period. We estimated the Charlson comorbidity index - 0 (n = 28 [25.9%]), 1 (n = 31 [56.5%]) and ≥ 2 (n = 19 [17.5%]) - the only variable that increased the chance of death or return to the tertiary hospital (Odds Ratio = 2.4; 95%CI 1.3;4.4). The length of stay in long-stay beds was 4,253 patient days, which would represent 607 patients at the tertiary hospital, considering the average hospital stay of seven days. The tertiary hospital increased the number of patients treated in 50.0% for Intensive Care, 66.0% for Neurology and 9.3% in total. Patients stayed in long-stay beds mainly in the first 30 (50.0%) and 60 (75.0%) days. CONCLUSIONS Implementing long-stay beds increased the number of patients treated in tertiary care, both in general and in system bottleneck areas such as Neurology and Intensive Care. The Charlson index of comorbidity is associated with the chance of patient death or return to tertiary care, even when adjusted for possible confounding factors.

RESUMO OBJETIVO Avaliar o impacto da implantação de leitos de longa permanência para pacientes de baixa complexidade e alta dependência em hospitais de pequeno porte sobre o desempenho de hospital terciário de referência em emergência. MÉTODOS Para este estudo longitudinal, foram identificados hospitais em três municípios no departamento regional de saúde coberto pela instância terciária e que forneciam 10 leitos de longa permanência cada. Os pacientes foram transferidos para os hospitais desses municípios com base em protocolo específico. Obteve-se o desfecho dos pacientes transferidos por acompanhamento diário. Fatores de confusão foram ajustados por regressão logística e semiparamétrica de Cox. RESULTADOS Entre 1 de setembro de 2013 e 30 de setembro de 2014, foram transferidos 97 pacientes, sendo 72,1% homens, com idade média de 60,5 anos (DP = 1,9), para os quais foram realizadas 108 transferências. Desses pacientes, 41,7% evoluíram ao óbito, 33,3% receberam alta, 15,7% retornaram à instância terciária, e apenas 9,3% permaneceram internados até o final do período analisado. Foi calculado o índice de comorbidade de Charlson - 0 (n = 28 [25,9%]), 1 (n = 31 [56,5%]) e ≥ 2 (n = 19 [17,5%]) - a única variável que aumentou a chance de óbito ou retorno ao hospital terciário (Razão de Chances = 2,4; IC95% 1,3;4,4). O tempo de permanência nos leitos de longa permanência foi de 4.253 pacientes-dia, que representariam 607 vagas no hospital terciário, considerando-se a média de internação de sete dias. O hospital terciário aumentou o número de vagas em 50,0% para terapia intensiva, 66,0% para neurologia e 9,3% para as vagas totais. A permanência dos pacientes nos leitos de longa permanência limitou-se em grande parte aos primeiros 30 (50,0%) e 60 (75,0%) dias. CONCLUSÕES A implantação de leitos de longa permanência teve impacto no aumento de vagas novas oferecidas pela instância terciária tanto gerais como para áreas de estrangulamento do sistema, como a Neurologia e Terapia Intensiva. O índice de comorbidade de Charlson está associado à chance de o paciente evoluir ao óbito ou retornar para a instância terciária, mesmo quando ajustado por possíveis fatores de confusão.

Atendimento às vítimas de lesão inalatória por incêndio em ambiente fechado: o que aprendemos com a tragédia de Santa Maria / Assistance of inhalation injury victims caused by fire in confined spaces: what we learned from the tragedy at Santa Maria

Em janeiro de 2013, uma catástrofe ocorrida em Santa Maria (RS), decorrente de um incêndio em ambiente fechado, resultou em 242 mortes, a maioria por lesões inalatórias. Em novembro de 2013, quatro vítimas necessitaram de suporte intensivo após inalação de fumaça em incêndio no Memorial da América Latina, em São Paulo (SP). Este artigo relata a evolução clínica e o manejo dos pacientes com lesão inalatória vítimas de uma catástrofe. Os pacientes ERL e OC apresentaram insuficiência respiratória precoce com broncoaspiração de material carbonáceo e intoxicação por monóxido de carbono. Foi instituído suporte ventilatório com oxigênio a 100%, retirada do material aspirado por broncoscopia, e terapia empírica com nitrito de sódio e tiossulfato de sódio para intoxicação por cianeto. O paciente RP apresentou tosse e queimação retroesternal. Evoluiu com insuficiência respiratória por edema de via aérea alta e infecção pulmonar precoce, manejados com ventilação pulmonar protetora e antimicrobianos. Foi extubado após melhora do edema no seguimento broncoscópico. O paciente MA, asmático, apresentou intoxicação por monóxido de carbono e broncoespasmo, sendo tratado com hiperóxia normobárica, broncodilatadores e corticoterapia. A estadia na unidade de terapia intensiva variou de 4 e 10 dias, e todos os pacientes apresentaram boa recuperação funcional no seguimento. Em conclusão, nos incêndios em ambientes fechados, as lesões inalatórias têm papel preponderante. O suporte ventilatório invasivo não deve ser postergado em caso de edema significativo de via aérea. A hiperóxia deve ser instituída precocemente como terapêutica para intoxicação por monóxido de carbono, bem como terapia farmacológica empírica para intoxicação por cianeto em caso de suspeita.

On January 2013, a disaster at Santa Maria (RS) due to a fire in a confined space caused 242 deaths, most of them by inhalation injury. On November 2013, four individuals required intensive care following smoke inhalation from a fire at the Memorial da América Latina in São Paulo (SP). The present article reports the clinical progression and management of disaster victims presenting with inhalation injury. Patients ERL and OC exhibited early respiratory failure, bronchial aspiration of carbonaceous material, and carbon monoxide poisoning. Ventilation support was performed with 100% oxygen, the aspirated material was removed by bronchoscopy, and cyanide poisoning was empirically treated with sodium nitrite and sodium thiosulfate. Patient RP initially exhibited cough and retrosternal burning and subsequently progressed to respiratory failure due to upper airway swelling and early-onset pulmonary infection, which were treated with protective ventilation and antimicrobial agents. This patient was extubated following improvement of edema on bronchoscopy. Patient MA, an asthmatic, exhibited carbon monoxide poisoning and bronchospasm and was treated with normobaric hyperoxia, bronchodilators, and corticosteroids. The length of stay in the intensive care unit varied from four to 10 days, and all four patients exhibited satisfactory functional recovery. To conclude, inhalation injury has a preponderant role in fires in confined spaces. Invasive ventilation should not be delayed in cases with significant airway swelling. Hyperoxia should be induced early as a therapeutic means against carbon monoxide poisoning, in addition to empiric pharmacological treatment in suspected cases of cyanide poisoning.

Assistance of inhalation injury victims caused by fire in confined spaces: what we learned from the tragedy at Santa Maria.

On January 2013, a disaster at Santa Maria (RS) due to a fire in a confined space caused 242 deaths, most of them by inhalation injury. On November 2013, four individuals required intensive care following smoke inhalation from a fire at the Memorial da América Latina in São Paulo (SP). The present article reports the clinical progression and management of disaster victims presenting with inhalation injury. Patients ERL and OC exhibited early respiratory failure, bronchial aspiration of carbonaceous material, and carbon monoxide poisoning. Ventilation support was performed with 100% oxygen, the aspirated material was removed by bronchoscopy, and cyanide poisoning was empirically treated with sodium nitrite and sodium thiosulfate. Patient RP initially exhibited cough and retrosternal burning and subsequently progressed to respiratory failure due to upper airway swelling and early-onset pulmonary infection, which were treated with protective ventilation and antimicrobial agents. This patient was extubated following improvement of edema on bronchoscopy. Patient MA, an asthmatic, exhibited carbon monoxide poisoning and bronchospasm and was treated with normobaric hyperoxia,bronchodilators, and corticosteroids. The length of stay in the intensive care unit varied from four to 10 days, and all four patients exhibited satisfactory functional recovery. To conclude, inhalation injury has a preponderant role in fires in confined spaces. Invasive ventilation should not be delayed in cases with significant airway swelling. Hyperoxia should be induced early asa therapeutic means against carbon monoxide poisoning, in addition to empiric pharmacological treatment in suspected cases of cyanide poisoning.

Association between use of lung-protective ventilation with lower tidal volumes and clinical outcomes among patients without acute respiratory distress syndrome: a meta-analysis.

CONTEXT: Lung-protective mechanical ventilation with the use of lower tidal volumes has been found to improve outcomes of patients with acute respiratory distress syndrome (ARDS). It has been suggested that use of lower tidal volumes also benefits patients who do not have ARDS. OBJECTIVE: To determine whether use of lower tidal volumes is associated with improved outcomes of patients receiving ventilation who do not have ARDS. DATA SOURCES: MEDLINE, CINAHL, Web of Science, and Cochrane Central Register of Controlled Trials up to August 2012. STUDY SELECTION: Eligible studies evaluated use of lower vs higher tidal volumes in patients without ARDS at onset of mechanical ventilation and reported lung injury development, overall mortality, pulmonary infection, atelectasis, and biochemical alterations. DATA EXTRACTION: Three reviewers extracted data on study characteristics, methods, and outcomes. Disagreement was resolved by consensus. DATA SYNTHESIS: Twenty articles (2822 participants) were included. Meta-analysis using a fixed-effects model showed a decrease in lung injury development (risk ratio [RR], 0.33; 95% CI, 0.23 to 0.47; I2, 0%; number needed to treat [NNT], 11), and mortality (RR, 0.64; 95% CI, 0.46 to 0.89; I2, 0%; NNT, 23) in patients receiving ventilation with lower tidal volumes. The results of lung injury development were similar when stratified by the type of study (randomized vs nonrandomized) and were significant only in randomized trials for pulmonary infection and only in nonrandomized trials for mortality. Meta-analysis using a random-effects model showed, in protective ventilation groups, a lower incidence of pulmonary infection (RR, 0.45; 95% CI, 0.22 to 0.92; I2, 32%; NNT, 26), lower mean (SD) hospital length of stay (6.91 [2.36] vs 8.87 [2.93] days, respectively; standardized mean difference [SMD], 0.51; 95% CI, 0.20 to 0.82; I2, 75%), higher mean (SD) PaCO2 levels (41.05 [3.79] vs 37.90 [4.19] mm Hg, respectively; SMD, -0.51; 95% CI, -0.70 to -0.32; I2, 54%), and lower mean (SD) pH values (7.37 [0.03] vs 7.40 [0.04], respectively; SMD, 1.16; 95% CI, 0.31 to 2.02; I2, 96%) but similar mean (SD) ratios of PaO2 to fraction of inspired oxygen (304.40 [65.7] vs 312.97 [68.13], respectively; SMD, 0.11; 95% CI, -0.06 to 0.27; I2, 60%). Tidal volume gradients between the 2 groups did not influence significantly the final results. CONCLUSIONS: Among patients without ARDS, protective ventilation with lower tidal volumes was associated with better clinical outcomes. Some of the limitations of the meta-analysis were the mixed setting of mechanical ventilation (intensive care unit or operating room) and the duration of mechanical ventilation.

Neuromuscular blocking agents in patients with acute respiratory distress syndrome: a summary of the current evidence from three randomized controlled trials.

BACKGROUND: Acute respiratory distress syndrome (ARDS) is a potentially fatal disease with high mortality. Our aim was to summarize the current evidence for use of neuromuscular blocking agents (NMBA) in the early phase of ARDS. METHODS: Systematic review and meta-analysis of publications between 1966 and 2012. The Medline and CENTRAL databases were searched for studies on NMBA in patients with ARDS. The meta-analysis was limited to: 1) randomized controlled trials; 02) adult human patients with ARDS or acute lung injury; and 03) use of any NMBA in one arm of the study compared with another arm without NMBA. The outcomes assessed were: overall mortality, ventilator-free days, time of mechanical ventilation, adverse events, changes in gas exchange, in ventilator settings, and in respiratory mechanics. RESULTS: Three randomized controlled trials covering 431 participants were included. Patients treated with NMBA showed less mortality (Risk ratio, 0.71 [95 % CI, 0.55 - 0.90]; number needed to treat, 1 - 7), more ventilator free days at day 28 (p = 0.020), higher PaO2 to FiO2 ratios (p = 0.004), and less barotraumas (p = 0.030). The incidence of critical illness neuromyopathy was similar (p = 0.540). CONCLUSIONS: The use of NMBA in the early phase of ARDS improves outcome.

Comorbidades e sinais de alerta da pneumonia adquirida na comunidade: análise de pacientes com mais de 50 anos / Comorbidities and warning signals of community acquired pneumonia: analysis of patients over 50 years old

Introdução: a pneumonia adquirida na comunidade (PAC) é a maior causa de morte por doenças infecciosas no mundo, principalmente em idosos. São Caetano do Sul, São Paulo, demonstra um aumento de população idosa (28%), devido ao aumento da expectativa de vida. Assim, o número de casos em pacientes ≥ 50 anos aumentou drasticamente. Dos 567 casos notificados em São Caetano Sul, de maio a dezembro de 2005 e de março a setembro de 2006, 70% correspondiam a idosos. Objetivo: analisar as comorbidades relacionadas à PAC em pacientes ≥ 50 anos e os sinais de alerta que estes apresentam no início do tratamento ambulatorial em São Caetano do Sul. Casuística e métodos: foram analisados 41 casos de PAC em pacientes ≥ 50 anos que apresentavam o quadro clínico compatível com infecção respiratória aguda, achado de infiltrado pulmonar novo ao raio X de tórax, associado à pelo menos um dos itens: desidratação, febre ≥ 38 ºC e tosse produtiva. Os critérios de exclusão foram a presença de doenças pulmonares e portadores de HIV. Resultados e conclusões: analisou-se o quadro de PAC em 41 pacientes com ≥ 50 anos, com sinais e sintomas característicos aos exames no Pronto Socorro. Devido à particularidade da amostra estudada, não se podem generalizar os resultados. Houve prevalência do sexo feminino, sendo a idade média dos pacientes de 69 anos Das comorbidades analisadas, a insuficiência cardíaca congestiva teve maior prevalência (50%), seguida pela insuficiência renal (25%). Dos pacientes analisados, 24% apresentavam uréia > 40 mg/dL e 18% apresentavam taquipnéia.

Introduction: the Community acquired pneumonia (CAP) is the major cause of death by infectious diseases in the world, especially among the elderly. Sao Caetano do Sul, São Paulo, shows a growth of the elderly population (28%), due to the rise of the life expectancy. Therefore, the number of cases in patients older than 50 years old rose drastically. From the 567 cases related in São Caetano do Sul, from May to December of 2005 and from March to September of 2006, 70% were related to elders. Objective: analyze the comorbidities related to CAP in patients older than 50 years, and the alert signs shown by them in the beginning of the ambulatory treatment in São Caetano do Sul. Subjectives and methods: 41 cases of CAP were analyzed in patients older than 50 years which presented clinical situation compatible with deep breathing infection, new pulmonary infiltrate discovered in the X-Ray exam of the chest, which is related to at least one of the following items: dehydration, fever and productive cough. The exclusion criteria were the diagnosis of lung diseases and HIV. Results and conclusions: the CAP scenes of 41 patients older then 50 years were analyzed, with signs and symptoms that are characteristics of the Emergency Medical Services exams. Due to the particularity of the sample studied, the result cannot be generalized. Females prevailed; the average age of the patients was 69 years. From all the comorbidities analyzed, the congestive cardiac insufficiency prevailed at most (50%), followed by the renal insufficiency (25%). Among the patients analyzed, 24% presented urea > 40 mg/dL and 18% presented shortpnea.