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Master's Dissertation
DOI
https://doi.org/10.11606/D.98.2022.tde-20062023-140930
Document
Author
Full name
Rayra Pureza Teixeira Barbosa
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2022
Supervisor
Committee
Oliveira, Gustavo Bernardes de Figueiredo (President)
Nakazone, Marcelo Arruda
Gomes, Walter José
Issa, Mario
Title in Portuguese
Escore de risco para sangramento pós-operatório clinicamente relevante em cirurgia de revascularização miocárdica
Keywords in Portuguese
Cirurgia Cardíaca
Fatores de Risco
Hemorragia
Pós-Operatório
Revascularização Miocárdica
Abstract in Portuguese
Racional: O sangramento cirúrgico é uma complicação comum no período pós-operatório em cirurgia de revascularização do miocárdio (RM) e, quando significante, pode associar-se a desfechos clínicos adversos. Os estudos apresentam grande variabilidade quanto à definição de sangramento pós-operatório maior (clinicamente relevante), fatores de risco e prognóstico. Objetivos: Identificar preditores independentes para sangramento maior pós-RM e impacto em mortalidade precoce, e elaborar escore de risco local de fácil implementação institucional. Métodos: Coorte retrospectiva, banco de dados com inclusão prospectiva, em um hospital quaternário para manejo de doenças cardiovasculares. Incluímos pacientes submetidos à RM isolada entre 1999 e 2017, com 80% dos casos para derivação e 20% para validação do escore. Modelos de regressão logística construídos com OR e IC 95%. Definimos sangramento maior com volume de drenagem torácica total >2,0 L ou que indicou revisão de hemostasia. Resultados: Os preditores independentes para sangramento foram sexo masculino, idade elevada, menor índice de massa corpórea, disfunção renal prévia, antecedente de AVC, e tempo de anóxia (pinçamento aórtico) elevado. Pacientes com sangramento maior apresentaram risco elevado de óbito quando comparados com pacientes sem sangramento maior [20.9% vs. 4.2%, OR 5,84 (IC95% 4,01-8,49), p<0,001] no modelo ajustado para idade, sexo, hipertensão, AVC prévio, disfunção renal, doença arterial periférica, extensão da DAC e tempo de CEC. Conclusões: Os fatores de risco independentemente relacionados ao sangramento pós-operatório em RM incluíram variáveis pré- e intra-operatórias de relevância clínica, foram associados a maior mortalidade hospitalar, e os escores de sangramento discriminaram gradientes de 10-15 vezes entre o menor e o maior risco.
Title in English
Risk score for clinically relevant postoperative bleeding in coronary artery bypass graft surgery
Keywords in English
Bleeding
Cardiac surgery
Myocardial revascularization
Postoperative
Risk factors
Abstract in English
Introduction: Surgical bleeding is a common complication in the postoperative period and, when significant, it can be associated with adverse outcomes. The studies differ regarding the definition of major postoperative bleeding, risk factors and prognostic. Objectives: To identify independent predictors for major bleeding after Coronary Artery Bypass Graft (CABG) and its impact on early mortality, and to develop a local risk score for easy institutional implementation. Methodology: This is a retrospective cohort study based on a prospective inclusion database in a quartenary hospital for the management of cardiovascular diseases. We included all patients who underwent isolated CABG between 1999 and 2017 with 80% of the patients for the scores development and 20% for its validation. Logistic regression models built with OR and 95% CI. We defined major bleeding with chest drainage volume >2.0 L or that led to hemostasis review. Results: The independent predictors for major bleeding were male gender, older age, lower body mass index (BMI), previous renal dysfunction, history of stroke, and prolonged time of anoxia. Patients with major bleeding were at increased risk of death when compared to patients without bleeding in the model adjusted for age, sex, hypertension, previous stroke, renal dysfunction, peripheral arterial disease, coronary artery disease (CAD) extension and cardiopulmonary by-pass time (CPB) [20.9% vs. 4.2%, OR 5,84 (IC95% 4,01-8,49), p<0,001]. Conclusions: The risk factors independently related to postoperative bleeding after CABG included preoperative and intraoperative variables of clinical relevance, and they were associated with higher death rates, and bleeding scores discriminated 10-15-fold gradients between lowest and highest risk.
 
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Publishing Date
2023-10-06
 
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