Assessment of pain and quality of life in patients undergoing cardiac surgery: a cohort study

SUMMARY OBJECTIVE: This study aimed to evaluate postoperative pain and quality of life in patients undergoing median sternotomy. METHODS: A cohort study was carried out on a sample of 30 patients who underwent elective cardiac surgery by longitudinal median sternotomy. Patients were interviewed at Intensive Care Unit discharge and hospital discharge, when the Visual Numeric Scale and the Brief Pain Inventory were applied, and 2 weeks after hospital discharge, when the World Health Organization Quality of Life-Bref questionnaire was administered. The normality of the results was analyzed by the Shapiro-Wilk test, and Wilcoxon Rank Sum and McNemar tests were utilized for the analysis of numerical and categorical variables. For correlation between numerical variables, Spearman's linear correlation test was applied. To compare numerical variables, Mann-Whitney U and Kruskal-Wallis tests were applied. Differences between groups were considered significant when the p-value was <0.05. RESULTS: Between Intensive Care Unit and hospital discharge, there was a reduction in median pain intensity assessed by the Visual Numeric Scale from 5.0 to 2.0 (p<0.001), as well as in eight Brief Pain Inventory parameters: worst pain intensity in the last 24 h (p=0.001), analgesic relief (p=0.035), and pain felt right now (p=0.009); and in interference in daily activities (p<0.001), mood (p=0.017), ability to walk (p<0.001), relationship with other people (p=0.005), and sleep (p=0.006). Higher pain intensity at Intensive Care Unit discharge was associated with worse performance in the psychological domain of quality of life at out-of-hospital follow-up. CONCLUSION: Proper management of post-sternotomy pain in the Intensive Care Unit may imply better quality of life at out-of-hospital follow-up.

Early Mobilization Prescription in Patients Undergoing Cardiac Surgery: Systematic Review

ABSTRACT Introduction: Early mobilization of patients in the postoperative period of cardiac surgery who are hospitalized in the intensive care unit (ICU) is a practice that has a positive impact. Methods: This is a systematic review of studies published until September 2020 in the Medical Literature Analysis and Retrieval System Online (or MEDLINE®), Embase, Physiotherapy Evidence Database (or PEDro), Scientific Electronic Library Online (or SciELO), and Latin American and Caribbean Health Sciences Literature (or LILACS) databases. Randomized clinical trials describing mobilization protocols performed early in ICU patients after cardiac surgery were included. Results: According to the eligibility criteria, only 14 of the 1,128 articles found were included in the analysis. Early mobilization protocols were initiated in the immediate postoperative period or first postoperative day. The resources and technics used were progressive mobilization, cycle ergometer, early bed activities, walking protocols, resistance exercise, and virtual reality. Intensity of the mobilization activities was determined using the Borg scale and heart rate. Conclusion: Early mobilization protocols are generalist (not individual), and low-intensity exercises are used, through progressive mobilization, with two daily physical therapy sessions, during 10 to 30 minutes.

Surviving the Struggle of COVID-19: Practical Recommendations for Pediatric/Adult Cardiology and Cardiac Surgical Programs in Resource-Limited Settings: a Review

ABSTRACT Introduction: The primary aim of this systematic review is to provide perioperative strategies to help restore or preserve cardiovascular services under threat from financial and personnel constraints imposed by the coronavirus disease 2019 (COVID-19) pandemic. Methods: The Medical Literature Analysis and Retrieval System Online, Excerpta Medica dataBASE, Cochrane Central Register of Controlled Trials/CCTR, and Google Scholar were systematically searched using the search terms "(cardiac OR cardiology OR cardiothoracic OR surgery) AND (COVID-19 or coronavirus OR SARS-CoV-2 OR 2019-nCoV OR 2019 novel coronavirus OR pandemic)". Additionally, the webpages of relevant medical societies, including the World Federation Society of Anesthesiologists, the Cardiothoracic Surgery Network, and the Society of Thoracic Surgeons, were screened for relevant information. Results: Whereas cardiac surgery and cardiology practices were reduced by 50-75% during the pandemic, mortality of patients with COVID-19 increased significantly. Healthcare workers are among those at high risk of infection with COVID-19. Conclusion: Hospitals must provide maximum protective equipment and training on how to use it to healthcare workers for their mutual protection. Triage management of patients — which accounts for patient's clinical status and risk-factor profile relatable to which services are available during the COVID-19 pandemic — is recommended. A strict reorganization of the hospital resources including preoperative, intraoperative, and postoperative detailed protective measures is necessary to reduce probability of vector contamination, to protect patients and the cardiovascular teams, and to permit safe resumption of cardiological and cardiac surgical activity.

Applicability of the Disruptions in Surgery Index in the Cardiovascular Management Scenarios - A Marker for Developing Functionally Efficient Teams

Abstract Introduction: To support the development of practices and guidelines that might help to reduce adverse events related to human factors, we aimed to study the response and perception by members of a cardiovascular surgery team of various error-driven or adverse features that might arise in the operating room (OR). Methods: A previously validated Disruptions in Surgery Index (DiSI) questionnaire was completed by individuals working together in a cardiovascular surgical unit. Results were submitted to reliability analysis by calculating the Cronbach's alpha coefficient. Non-parametric Kruskal-Wallis test and Dunn's post-test were performed to estimate differences in perceptions of adverse events or outcomes between the groups (surgeons, nurses, anesthesiologists, and technicians). P<0.05 was considered statistically significant. Results: Cronbach's alpha reliability coefficients showed consistency within the recommended range for all disruption types assessed in DiSI: an individual's skill (0.85), OR environment (0.88), communication (0.81), situational awareness (0.92), patient-related disruption (0.89), team cohesion (0.83), and organizational disruption (0.83). Nurses (27.4%) demonstrated significantly higher perception of disruptions than surgeons (25.4%), anesthetists (23.3%), and technicians (23.0%) (P=0.005). Study participants were more observant of their colleagues' disruptive behaviors than their own (P=0.0001). Conclusion: Our results revealed that there is a tendency among participants to hold a positive self-perception position. DiSI appears to be a reliable and useful tool to assess surgical disruptions in cardiovascular OR teams, identifying negative features that might imperil teamwork and safety in the OR. And human factors training interventions are available to develop team skills and improve safety and efficiency in the cardiovascular OR.

Acute response to aerobic exercise on autonomic cardiac control of patients in phase iii of a cardiovascular rehabilitation program following coronary artery bypass grafting

Abstract Objective: The aim of the present study was to investigate the acute response to aerobic exercise on autonomic cardiac control of patients undergoing coronary artery bypass grafting (CABG). Methods: The study sample consisted of eight patients (age: 58.6±7.7 years; body mass index: 26.7±3.5 kg.m2) who underwent a successful CABG (no complications during surgery and/or in the following weeks). To assess heart rate variability (HRV), participants remained in a supine position with a 30-degree head elevation for 20 minutes. Electrocardiographic signal (protocol with three derivations) was collected from 600 Hz sample rate to obtain beat-to-beat intervals (R-R interval). This assessment was performed before, after one hour and after 24 hours of the exercise session. All patients underwent a 35 minutes aerobic exercise session (AES) (low-moderate intensity) on the cycle ergometer. Results: Significant differences were found in the time domain, with positive changes in root mean square of successive RR interval differences (rMSSD) (ms) (parasympathetic component) (one [P=0.017] and 24 hours [P=0.007] post-session). In the frequency domain, we found a significant difference in high frequency (HF) (ms2) (parasympathetic component) (one hour [P=0.048] post-session). The low frequency (LF)/HF ratio (sympathetic and parasympathetic components with a predominance of the sympathetic component) reached statistical significance only 24 hours (P=0.018) post-session. Additionally, the largest effect size was observed only for the LF/HF ratio at one (d=-0.8) and 24 hours (d=-1.3) after one AES. Conclusion: The practice of (acute) aerobic exercise improved autonomic cardiac control in patients undergoing CABG.

Coronary artery bypass surgery in Brazil: analysis of the national reality through the bypass registry

Abstract Introduction: Coronary artery bypass grafting (CABG) is the most frequently performed heart surgery in Brazil. Recent international guidelines recommend that national societies establish a database on the practice and results of CABG. In anticipation of the recommendation, the BYPASS Registry was introduced in 2015. Objective: To analyze the profile, risk factors and outcomes of patients undergoing CABG in Brazil, as well as to examine the predominant surgical strategy, based on the data included in the BYPASS Registry. Methods: A cross-sectional study of 2292 patients undergoing CABG surgery and cataloged in the BYPASS Registry up to November 2018. Demographic data, clinical presentation, operative variables, and postoperative hospital outcomes were analyzed. Results: Patients referred to CABG in Brazil are predominantly male (71%), with prior myocardial infarction in 41.1% of cases, diabetes in 42.5%, and ejection fraction lower than 40% in 9.7%. The Heart Team indicated surgery in 32.9% of the cases. Most of the patients underwent cardiopulmonary bypass (87%), and cardioplegia was the strategy of myocardial protection chosen in 95.2% of the cases. The left internal thoracic artery was used as a graft in 91% of the cases; the right internal thoracic artery, in 5.6%; and the radial artery in 1.1%. The saphenous vein graft was used in 84.1% of the patients, being the only graft employed in 7.7% of the patients. The median number of coronary vessels treated was 3. Operative mortality was 2.8%, and the incidence of cerebrovascular accident was 1.2%. Conclusion: CABG data in Brazil provided by the BYPASS Registry analysis are representative of our national reality and practice. This database constitutes an important reference for indications and comparisons of therapeutic procedures, as well as to propose subsequent models to improve patient safety and the quality of surgical practice in the country.

Pre-validation study of the brazilian version of the disruptions in surgery index (disi) as a safety tool in cardiothoracic surgery

Abstract Introduction: Most risk stratification scores used in surgery do not include external and non-technical factors as predictors of morbidity and mortality. Objective: The present study aimed to translate and adapt transculturally the Brazilian version of the Disruptions in Surgery Index (DiSI) questionnaire, which was developed to capture the self-perception of each member of the surgical team regarding the disruptions that may contribute to error and obstruction of safe surgical flow. Methods: A universalist approach was adopted to evaluate the conceptual equivalence of items and semantics, which included the following stages: (1) translation of the questionnaire into Portuguese; (2) back translation into English; (3) panel of experts to draft the preliminary version; and (4) pre-test for evaluation of verbal comprehension by the target population of 43 professionals working in cardiothoracic surgery. Results: The questionnaire was translated into Portuguese and its final version with 29 items obtained 89.6% approval from the panel of experts. The target population evaluated all items as easy to understand. The mean overall clarity and verbal comprehension observed in the pre-test reached 4.48 ± 0.16 out of the maximum value of 5 on the psychometric Likert scale. Conclusion: Based on the methodology used, the experts' analysis and the results of the pre-test, it is concluded that the essential stages of translation and cross-cultural adaptation of DiSI to the Portuguese language were satisfactorily fulfilled in this study.

Modified hybrid procedure in hypoplastic left heart syndrome: initial experience of a center in northeastern Brazil

Abstract Introduction: Although it only corresponds to 2.5% of congenital heart defects, hypoplastic left heart syndrome (HLHS) is responsible for more than 25% of cardiac deaths in the first week of life. Palliative surgery performed after the second week of life is considered an important risk factor in the treatment of HLHS. Objective: The aim of this study is to describe the initial experience of a medical center in Northeastern Brazil with a modified off-pump hybrid approach for palliation of HLHS. Methods: From November 2012 through November 2015, the medical records of 8 patients with HLHS undergoing hybrid procedure were retrospectively evaluated in a tertiary private hospital in Northeastern Brazil. The modified off-pump hybrid palliation consisted of stenting of the ductus arteriosus guided by fluoroscopy without contrast and banding of the main pulmonary artery branches. Demographic and clinical variables were recorded for descriptive analysis. Results: Eight patients were included in this study, of whom 37.5% were female. The median age and weight at the time of the procedure was 2 days (p25% and p75% = 2 and 4.5 days, respectively) and 3150 g (p25% and p75% = 3077.5 g and 3400 g, respectively), respectively. The median length in intensive care unit stay was 6 days (p25% and p75% = 3.5% and 8 days, respectively). There were no in-hospital deaths. Four patients have undergone to the second stage of the surgical treatment of HLHS. Conclusion: In this series, the initial experience with the modified off-pump hybrid procedure showed to be safe, allowing a low early mortality rate among children presenting HLHS.

The brazilian registry of adult patient undergoing cardiovascular surgery, the bypass project: results of the first 1,722 patients

Abstract Objective: To report the early results of the BYPASS project - the Brazilian registrY of adult Patient undergoing cArdiovaScular Surgery - a national, observational, prospective, and longitudinal follow-up registry, aiming to chart a profile of patients undergoing cardiovascular surgery in Brazil, assessing the data harvested from the initial 1,722 patients. Methods: Data collection involved institutions throughout the whole country, comprising 17 centers in 4 regions: Southeast (8), Northeast (5), South (3), and Center-West (1). The study population consists of patients over 18 years of age, and the types of operations recorded were: coronary artery bypass graft (CABG), mitral valve, aortic valve (either conventional or transcatheter), surgical correction of atrial fibrillation, cardiac transplantation, mechanical circulatory support and congenital heart diseases in adults. Results: 83.1% of patients came from the public health system (SUS), 9.6% from the supplemental (private insurance) healthcare systems; and 7.3% from private (out-of -pocket) clinic. Male patients comprised 66%, 30% were diabetics, 46% had dyslipidemia, 28% previously sustained a myocardial infarction, and 9.4% underwent prior cardiovascular surgery. Patients underwent coronary artery bypass surgery were 54.1% and 31.5% to valve surgery, either isolated or combined. The overall postoperative mortality up to the 7th postoperative day was 4%; for CABG was 2.6%, and for valve operations, 4.4%. Conclusion: This first report outlines the consecution of the Brazilian surgical cardiac database, intended to serve primarily as a tool for providing information for clinical improvement and patient safety and constitute a basis for production of research protocols.

Climacteric Symptoms and Sexual Dysfunction: Association between the Blatt-Kupperman Index and the Female Sexual Function Index / Sintomatologia climatérica e disfunção sexual: associação entre o índice de Kupperman e Blatt e o índice de função sexual feminina

Abstract Objective To investigate the association between the intensity of climacteric symptoms and sexual dysfunction in women aged 40 to 65 years. Methods Observational, analytic, cross-sectional study conducted with 63 women aged 40 to 65 treated at the gynecology outpatient clinic of a public hospital in northeastern Brazil. A questionnaire was used to collect identification data, clinical information, gynecological-obstetric data, lifestyle traits and information on chronic diseases. Climacteric symptoms and sexual function were evaluated by means of the Blatt-Kupperman index and the Female Sexual Function Index (FSFI) respectively. The association between the two indices was investigated using the chi-squared test; the difference in mean scores on the FSFI as a function of menopausal status was evaluated by Student's t-test. The significance level was set to p < 0.05. Results The mean value of the Blatt-Kupperman index was 26.42 (standard deviation [SD]: 4.52); 36.51% of the women exhibited severe symptoms. The mean score on the FSFI was 21.84 (SD: 4.11). More than half of the analyzed women (58.73%) exhibited sexual dysfunction (FSFI ≤ 26.5). Regarding the association between the Blatt- Kupperman index and the FSFI, the greater the intensity of the climacteric symptoms (Blatt-Kupperman), the higher the frequency of sexual dysfunction (FSFI). Sexual dysfunction was exhibited by 100% of the participants with severe climacteric symptoms, 70.59% of those with moderate symptoms, and only 9.09% with mild symptoms (p < 0.001). Conclusions The application of the Blatt-Kupperman index and of the FSFI allowed the detection of an association between the severity of climacteric symptoms and the prevalence of sexual dysfunction.

Resumo Objetivo Verificar, em mulheres de 40 a 65 anos, a associação entre a intensidade dos sintomas climatéricos e a disfunção sexual. Métodos Estudo observacional, analítico, transversal, comamostra de 63 mulheres entre 40 e 65 anos atendidas em um ambulatório de ginecologia de um hospital público do Nordeste do Brasil. Foi aplicado um questionário com dados de identificação, informações clínicas, dados ginecológico-obstétricos, hábitos de vida e doenças crônicas. Os sintomas climatéricos e a função sexual foram avaliados utilizando o índice de Kupperman e Blatt e o índice de função sexual feminina (IFSF) respectivamente. Para avaliar a associação entre estes índices, foi utilizado o teste do qui-quadrado, e, para avaliar a diferença entre as médias do IFSF de acordo com o status menopausal, foi utilizado o teste t de Student. Um valor de p < 0,05 foi considerado significante. Resultados A média do índice de Kurpperman e Blatt da população estudada foi de 26,42 (desvio-padrão [DP]: 4,52). Houve presença de sintomas acentuados em 36,51% das mulheres estudadas. A média do IFSF entre as pacientes estudadas foi de 21,84 (DP: 4,11). Mais da metade das mulheres em estudo (58,73%) apresentou disfunção sexual (FSFI ≤ 26,5). Quando analisada a associação entre o índice de Kupperman e Blatt e o IFSF, foi observado que, quanto maior a intensidade dos sintomas climatéricos (Kupperman e Blatt), maior a frequência de disfunção sexual (IFSF). Apresentaram disfunção sexual 100% das pacientes com sintomas climatéricos acentuados, sendo que 70,59% com sintomas moderados, e apenas 9,09% com sintomas leves (p < 0,001). Conclusões No presente estudo, quando aplicados o índicesde Kupperman e Blatt e o IFSF, observou-se associação entre a gravidade dos sintomas climatéricos e a prevalência de disfunção sexual.

Application of kinesiotherapy and electrothermotherapy in the treatment of elderly with knee osteoarthrosis: a comparative study / Aplicação da cinesioterapia e eletrotermoterapia no tratamento de idosas com osteoartrose de joelho: estudo comparativo

Abstract Introduction Among the treatment modalities in this disease , the surgical and conservative means stand out through therapy resources such as electro-thermotherapy and kinetic therapy. The general objective of this study was to evaluate the effects from two protocols of physical therapy in elder women with knee osteoarthritis. Methods An experimental clinical trial type study consisting of pre and post tests was performed, in which 30 female patients were selected, all between 61 and 80 years old, diagnosed with primary knee OA, treated at the Center for Comprehensive Health Care for the Elder (CAISI - Centro de Atenção Integral à Saúde do Idoso). They were divided into 2 groups of 15 persons for each type of treatment: Group I was treated with kinetic therapy, and group II was treated with electro-thermotherapy. Patients from both groups underwent 36 physical therapy sessions during 12 weeks. For data collection, protocol sheets with socio-demographic data, Body Mass Index (BMI) at kg/m2, visual analogue scale (VAS) and measurement of motion range (ADM) were used. For statistics analysis, the Mann-Whitney, Wilcoxon and Chi-square's non-parametric tests were used. Student's parametric tests were also applied as independent samples. Results The tests performed in both groups contributed to the reduction in the level of pain. There were differences in group I and II on the increase of ADM, except in bending the left knee in group II. Conclusion It was concluded that both treatment modalities showed effective therapeutic responses, but these benefits were even higher in OA treatment by kinetic therapy.

Resumo Introdução Dentre as modalidades de tratamento na Osteoartrose, destacam-se a forma cirúrgica e conservadora através dos recursos fisioterapêuticos como a eletrotermoterapia e a cinesioterapia. Objetivo Verificar os efeitos de dois protocolos terapêuticos em mulheres idosas com Osteoartrose de joelho. Métodos Realizou-se um estudo do tipo ensaio clínico não controlado com delineamento pré-teste e pós-teste, onde foram selecionadas para a pesquisa 30 pacientes do sexo feminino, com idade entre 61 a 80 anos, com diagnóstico de Osteoartrose de joelho primária, atendidas em um Centro de Referência Integral à Saúde do Idoso (CAISI), que foram divididas em 2 grupos de 15 pessoas para cada modalidade de terapias: o grupo I foi tratado com a cinesioterapia, e o grupo II foi tratado com eletrotermoterapia. Pacientes de ambos os grupos realizaram 36 atendimentos fisioterapêuticos durante 12 semanas. Para a coleta dos dados foi utilizada ficha protocolo contendo dados sócio-demográficos, índice de massa corporal (IMC), escala visual analógica (EVA) e medida da amplitude do movimento (ADM). Para análise estatística, foram utilizados os testes não paramétricos de Mann-Whitney e Wilcoxon, o teste paramétrico t de Student para amostras independentes e para verificar as associações o teste qui-quadrado. Resultados Os tratamentos realizados nos dois grupos contribuíram para a redução do nível de dor. Houveram diferenças nos grupo I e II quanto ao aumento da ADM, exceto na flexão do joelho esquerdo no grupo II. Conclusões Conclui-se que ambas as modalidades de terapias demonstraram respostas terapêuticas pela redução da dor e melhora da ADM, porém o grupo que foi tratado pela cinesioterapia obteve uma melhora mais acentuada.

Sex Differences in Mortality After CABG Surgery

ABSTRACT INTRODUCTION: Numerous studies have shown that women undergoing coronary artery bypass graft surgery present higher mortality rate during hospitalization, and often complications when compared to men. OBJECTIVE: To compare the mortality of men and women undergoing coronary artery bypass graft surgery and identify factors related to differences occasionally found. METHODS: Retrospective cohort study conducted with 215 consecutive patients who underwent coronary bypass surgery. RESULTS: Women had a higher average age. Low body surface and dyslipidemia were more prevalent in women (1.65 vs . 1.85, P<0.001: 53% vs . 30%, P =0.001), whereas history of smoking and previous myocardial infarction were more prevalent in men (35% vs .14.7%, P =0.001; 20% vs . 2.7%, P =0.007). Regarding complications in the postoperative period, there was a higher rate of blood transfusions in women. The overall mortality rate was 5.6%, however there was no statistically significant difference in mortality between men and women. It was observed that among the patients who died, the average body surface area was lower than that of patients who did not have this complication. CONCLUSION: There was no difference in mortality between the sexes after coronary artery bypass graft in this service.

Effects of Resistance Exercise Applied Early After Coronary Artery Bypass Grafting: a Randomized Controlled Trial

ABSTRACT OBJECTIVE: To evaluate the effects of resistance exercise applied early after coronary artery bypass grafting. METHODS: It is a randomized controlled trial with 34 patients undergoing coronary artery bypass grafting between August 2013 and May 2014. Patients were randomized into two groups by simple draw: a control group (n=17), who received conventional physical therapy and an intervention group (n=17), who received, additionally, resistance exercise. Pulmonary function and functional capacity were evaluated in preoperative period and hospital discharge by spirometry and the six-minute walk test. For statistical analysis, we used the following tests: Shapiro-Wilk, Mann-Whitney, Student'st and Fisher's exact. Variables withP<0.05 were considered significant. RESULTS: Groups were homogeneous in terms of demographic, clinical and surgical variables. Resistance exercise exerted no effect on pulmonary function of intervention group compared to control group. However, intervention group maintained functional capacity at hospital discharge measured by percentage of predict distance in 6MWT (54.122.7% vs. 52.515.5%,P=0.42), while control group had a significant decrease (59.211.1% vs. 50.69.9%, P<0.016). CONCLUSION: Our results indicate that resistance exercise, applied early, may promote maintenance of functional capacity on coronary artery bypass grafting patients, having no impact on pulmonary function when compared to conventional physical therapy.

Effects of different PEEP levels on respiratory mechanics and oxygenation after coronary artery bypass grafting / Efeitos de diferentes níveis de PEEP na mecânica respiratória e oxigenação após revascularização do miocárdio

OBJECTIVE: To compare the effects of different levels of positive end-expiratory pressure on respiratory mechanics and oxygenation indexes in the immediate postoperative period of coronary artery bypass grafting. METHODS: Randomized clinical trial in which 136 patients underwent coronary artery bypass grafting between January 2011 and March 2012 were divided into three groups and admitted to mechanical ventilation with different positive end-expiratory pressure levels: Group A, 5 cmH2O (n=44), Group B, 8 cmH2O (n=47) and Group C, 10 cmH2O (n=45). Data about respiratory mechanics were obtained from mechanical ventilator monitor and oxygenation indexes from arterial blood gas samples, collected twenty minutes after intensive care unit admission. Patients with chronic obstructive pulmonary disease and patients submitted to off-pump, emergency or combined operations were not included. For statistical analysis, we used Kruskal-Wallis, G and Chi-square tests, considering results significant when P<0.05. RESULTS: Groups were homogeneous in terms of demographic, clinical and surgical variables. Patients ventilated with positive end-expiratory pressure of 10 cmH2O (Group C) had best compliance (P=0.04) and airway resistance values, this, however, without statistical significance. They also had best oxygenation indexes, with statistical difference in all analyzed variables, and lower frequency of hypoxemia (P=0.03). CONCLUSION: Higher levels of positive end-expiratory pressure in immediate postoperative period of coronary artery bypass grafting improved pulmonary compliance values and increased oxygenation indexes, resulting in lower frequency of hypoxemia.

OBJETIVO: Comparar os efeitos de diferentes níveis de pressão expiratória positiva final na mecânica respiratória e nos índices de oxigenação no pós-operatório imediato de revascularização do miocárdio. MÉTODOS: Ensaio clínico randomizado no qual 136 pacientes submetidos à revascularização do miocárdio, entre janeiro de 2011 e março de 2012, foram distribuídos em três grupos e admitidos na ventilação mecânica com diferentes níveis de pressão expiratória positiva final: Grupo A, 5 cmH2O (n=44), Grupo B, 8 cmH2O (n=47) e Grupo C, 10 cmH2O (n=45), sendo os dados da mecânica respiratória obtidos do monitor do ventilador mecânico e os índices de oxigenação por meio de gasometria arterial coletada vinte minutos após a admissão na unidade de terapia intensiva. Não foram incluídos pacientes com doença pulmonar obstrutiva crônica, cirurgias associadas, de emergência ou sem circulação extracorpórea. Para análise estatística, empregaram-se os testes de Kruskal-Wallis, Teste G e Qui-quadrado, considerando os resultados significantes quando P<0,05. RESULTADOS: Os grupos apresentaram-se homogêneos em relação às variáveis demográficas, clínicas e cirúrgicas. Os pacientes ventilados com pressão expiratória positiva final de 10 cmH2O (Grupo C) apresentaram os melhores valores de complacência (P=0,04) e de resistência das vias aéreas, esta, porém sem significância estatística. Apresentaram, ainda, os melhores índices de oxigenação, com diferença estatística em todas as variáveis estudadas, além de menor frequência de hipoxemia (P=0,03). CONCLUSÃO: Níveis mais elevados de pressão expiratória positiva final no pós-operatório imediato de revascularização do miocárdio incrementaram os valores de complacência pulmonar e melhoraram os índices de oxigenação, resultando acarretando em menor frequência de hipoxemia.

Acute kidney injury after coronary artery bypass grafting: assessment using RIFLE and AKIN criteria / Lesão renal aguda no pós-operatório de revascularização do miocárdio: avaliação pelos critérios RIFLE e AKIN

OBJECTIVE: To compare the RIFLE (Risk, Injury, Failure, Loss and End-stage Renal Failure) and AKIN (Acute Kidney Injury Network) criteria for diagnosis of acute kidney injury after coronary artery bypass grafting. METHODS: Retrospective cohort. 169 patients who underwent coronary artery bypass grafting from January 2007 through December 2008 were analyzed. Information was entered into a database and analyzed using STATA 9.0. RESULTS: Patients' mean age was 63.43 1 9.01 years old. Predominantly male patients (66.86%) were studied. Acute Kidney Injury was present in 33.14% by AKIN and in 29.59% by RIFLE. Hemodialysis was required by 3.57% and 4.0% of the patients when AKIN and RIFLE were applied respectively. There was 4.0% and 3.57% mortality of patients with Acute Kidney Injury according to the RIFLE and AKIN criteria, respectively. In 88.76% of the cases, there was good agreement between the two methods in the detection (kappa=0.7380) and stratification (kappa=0.7515) of Acute Kidney Injury. CONCLUSION: This study showed that the RIFLE and AKIN criteria have a good agreement in the detection and stratification of acute kidney injury after coronary artery bypass grafting.

OBJETIVO: Comparar os critérios RIFLE (Risk, Injury, Failure, Loss and EndStage Renal Failure) e AKIN (Acute Kidney Injury Network) para diagnóstico de lesão renal aguda em pacientes no pós-operatório de revascularização do miocárdio. MÉTODOS: Coorte retrospectiva, a partir dos prontuários de 169 pacientes submetidos à cirurgia de revascularização do miocárdio, de janeiro de 2007 a dezembro de 2008. As informações foram inseridas em um banco de dados e analisadas pelo software STATA 9.0. RESULTADOS: A média de idades dos pacientes foi de 63,43 1 9,01 anos, havendo predominância do gênero masculino (66,86%). A lesão renal aguda foi detectada em 33,14% pelo AKIN e 29,59% pelo RIFLE. A hemodiálise foi necessária em 3,57% e em 4% dos pacientes, quando o AKIN e RIFLE foram aplicados, respectivamente. Foram a óbito 4% e 3,57% dos pacientes com Lesão Renal Aguda pelos critérios RIFLE e AKIN, respectivamente. Em 88,76% dos casos, ambos os métodos demonstraram boa concordância para detecção (kappa=0,7380) e estratificação (kappa=0,7515) de lesão renal aguda. CONCLUSÃO: O presente estudo permitiu concluir que os critérios RIFLE e AKIN possuem boa concordância na detecção e estratificação da lesão renal aguda no pós-operatório de revascularização do miocárdio.

Avaliação do escore CABDEAL como preditor de disfunção neurológica no pós-operatório de revascularização miocárdica com circulação extracorpórea / Assesment of CABDEAL score as predictor of neurological dysfunction after on-pump coronary artery bypass grafting surgery

INTRODUÇÃO: As complicações neurológicas são temidas no pós-operatório das cirurgias cardíacas, sendo importante causa de óbito e de gastos hospitalares. Sua predição ainda é incerta. OBJETIVO: Avaliar a aplicabilidade de um escore pré-operatório como preditor de disfunção neurológica no pós-operatório de revascularização miocárdica (RM) com circulação extracorpórea (CEC). MÉTODOS: Estudo prospectivo que avaliou 77 pacientes submetidos à RM no período de fevereiro a outubro de 2011. Utilizando-se o escore CABDEAL (creatinine, age, body mass index, diabetes, emergency surgery, abnormality on ECG, lung disease), os pacientes foram agrupados em alto (CABDEAL > 4) e baixo risco (CABDEAL<4). Para os desfechos encefalopatia e acidente vascular encefálico (AVE), foram comparados os valores preditivos do escore e das variáveis intra e pós-operatórias (tempos de pinçamento aórtico, CEC e ventilação mecânica). O teste exato de Fischer foi usado na análise estatística. A análise da curva ROC foi utilizada para avaliar a acurácia do modelo para os desfechos neurológicos. Adotou-se o nível de significância P<0,05. RESULTADOS: A taxa de mortalidade foi de 2,6% (n=2). Ocorreram dois episódios de AVE (2,6%) e 12 (15,5%) de encefalopatia. O desfecho encefalopatia associou-se significativamente com CABDEAL de alto risco (P=0,0009), tempo de ventilação mecânica (P=0,014), tempo de CEC (P=0,02), e tempo de pinçamento aórtico (P=0,006); este último associou-se também com AVE (P=0,03) e óbito (P=0,006). O escore CABDEAL apresentou maior área sob a curva ROC do que as demais variáveis para o desfecho encefalopatia. CONCLUSÃO: Na amostra estudada, o escore CABDEAL foi melhor preditor de encefalopatia no pós-operatório de RM quando comparado às variáveis intraoperatórias analisadas.

INTRODUCTION: Neurological dysfunction is a feared postoperative morbidity of cardiac surgery, an important cause of death and increased spending in hospitals. Its prediction, however, is still uncertain. OBJECTIVE: To assess the applicability of a preoperative score as a predictor of neurological dysfunction after coronary artery bypass grafting (CABG) under cardiopulmonary bypass (CPB). METHODS: Prospective study that evaluated 77 patients who underwent CABG from February to October 2011. Using the score CABDEAL (creatinine, age, body mass index, diabetes, emergency surgery, abnormality on ECG, lung disease), patients were grouped into high (CABDEAL > 4) and low risk (CABDEAL<4). The predictive value of the score was compared with intraoperative and postoperative variables (aortic clamping time, CPB and ventilation time) as predictors of encephalopathy and stroke. Data were analyzed with descriptive statistics and compared with the Fisher exact test. ROC curve analysis was performed to evaluate the accuracy of the model for the neurological outcomes. It was considered the significant value P<0.05. RESULTS: The mortality rate was 2.6% (n=2). There were 2 episodes of stroke (2.6%) and 12 (15.5%) of encephalopathy. High risk CABDEAL (P=0.0009), ventilation time (P=0.014), CPB time (P=0.02) and aortic clamping time (P=0.006) were significantly associated with encephalopathy. The aortic clamping time was also associated with stroke (P=0.03) and death (P=0.006). CABDEAL score showed the largest area under the ROC curve rather than others variables. CONCLUSION: In this study, the CABDEAL score stood out as the best predictor of encephalopathy after CABG when compared to the others intraoperative variables.