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Master's Dissertation
DOI
10.11606/D.5.2015.tde-04082015-095159
Document
Author
Full name
Aline Carralas Queiroz de Leão
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2015
Supervisor
Committee
Levin, Anna Sara Shafferman (President)
Sartori, Ana Marli Christovam
Guimarães, Thais
Title in Portuguese
Impacto das bacteremias por Acinetobacter spp. em relação a bacteremias causadas por outras bactérias na sobrevida de pacientes internados em unidade de terapia intensiva
Keywords in Portuguese
Acinetobacter
Análise de sobrevida
Bacteremia
Unidade de terapia intensiva
Abstract in Portuguese
Introdução: Tem sido um desafio determinar o verdadeiro impacto clínico do Acinetobacter spp., devido a predileção desse microrganismo em colonizar e infectar pacientes críticos, os quais apresentam prognóstico ruim independente de complicações infecciosas secundárias. Objetivo: Avaliar se a sobrevida de pacientes com bacteremia por Acinetobacter spp. é menor em relação a de pacientes com bacteremia causada por outras bactérias prevalentes em unidade de terapia intensiva. Método: Trata-se de um estudo de coorte retrospectivo de pacientes internados nas unidades de terapia intensiva do Instituto Central do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, que desenvolveram bacteremia no período de 1 de janeiro de 2010 a 31 de dezembro de 2011. Pacientes com bacteremia por Acinetobacter spp. foram comparados a pacientes com bacteremia causada por outros patógenos (Klebsiella pneumoniae, Staphylococcus aureus, Enterobacter spp., Enterococcus spp. e Pseudomonas aeruginosa). Foi realizada análise de sobrevida em 30 dias. O método de Kaplan-Meier e teste de log-rank foram usados para determinar a sobrevida global. Fatores prognósticos potenciais foram identificados por análise bivariada e regressão multivariada de Cox. Resultados: 141 pacientes foram avaliados. Não houve diferenças entre os pacientes com bacteremia por Acinetobacter spp. e outros patógenos com relação à idade, sexo, APACHE II, índice de comorbidade de Charlson e tipo de infecção. A análise bivariada mostrou que idade > 60 anos, diabetes mellitus, infecção por Acinetobacter spp., tratamento inadequado, score de Pitt > 3, presença de choque séptico, uso de ventilação mecânica, uso de acesso central e número de falência de órgãos > 2 foram significativamente associados a pior prognóstico. Foram realizados dois modelos de análise de regressão logística. O modelo A mostrou que tratamento inadequado e score de Pitt > 3 pontos foram estatisticamente associados com letalidade. No modelo B, infecção por Acinetobacter spp. (HR = 1,93 IC 95%: 1,25-2,97) e idade > 60 anos foram fatores prognósticos independentes. Conclusão: Pacientes com bacteremia por Acinetobacter spp. apresentaram menor sobrevida em relação a pacientes com bacteremia causada por outras bactérias prevalentes em unidade de terapia intensiva
Title in English
Impact of Acinetobacter spp. bacteremia compared with bacteremia caused by other pathogens on the survival of intensive care patients
Keywords in English
Acinetobacter
Bacteremia
Intensive care units
Survival analysis
Abstract in English
Introduction: It has been challenging to determine the true clinical impact of Acinetobacter spp., given the predilection of this pathogen to colonize and infect critically ill patients, who often have a poor prognosis irrespective of secondary infective complications. Objective: The aim of this study was to assess whether the survival of patients with Acinetobacter spp. bacteremia is lower than that of patients with bacteremia caused by other bacteria prevalent in intensive care unit. Setting: A retrospective review of medical records was conducted for all patients admitted to the ICUs who developed bacteremia from January 2010 through December 2011. Patients with Acinetobacter spp. were compared with those with other pathogens (Klebsiella pneumoniae, Staphylococcus aureus, Enterobacter spp., Enterococcus spp., Pseudomonas aeruginosa). We did a 30-day survival analysis. The Kaplan-Meier method and log-rank test were used to determine the overall survival. Potential prognostic factors were identified by bivariate and multivariate Cox regression analysis. Results: 141 patients were evaluated. No differences between patients with Acinetobacter spp. and other pathogens were observed with regard to age, sex, APACHE II score, Charlson Comorbidity Score and type of infection. Bivariate analysis showed that age > 60 years, diabetes mellitus, Acinetobacter spp. infection, inappropriate treatment, Pitt Bacteremia score >3, presence of septic shock, mechanical ventilation, use of central line and number of organ failures > 2 were significantly associated with a poor prognosis. We did two models of logistic regression analysis. Model A showed that inappropriate treatment and Pitt score > 3 points were statistically associated with mortality. In model B, Acinetobacter spp. infection (HR= 1.93, 95%CI: 1.25-2.97) and age > 60 years were independent prognostic factors. Conclusion: Patients with Acinetobacter spp. bacteremia had lower survival compared with patients with bacteremia caused by other bacteria prevalent in intensive care unit
 
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Publishing Date
2015-08-04
 
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