Epidemiología, diagnóstico y tratamiento de la sepsis severa en Uruguay: un estudio multicéntrico prospectivo / Epidemiology, diagnosis and treatment of severe sepsis in Uruguay: a prospective, multi-center study

Objetivo: conocer las características epidemiológicas de pacientes que ingresan por sepsis severa (SS) y shock séptico (ShS); valorar la implementación de recomendaciones de la campaña Sobrevivir a las Sepsis (CSS) y determinar variables asociadas con mal pronóstico vital. Diseño: estudio prospectivo, observacional, cohorte única, multicéntrico, durante un año (setiembre 2011 - agosto 2012). Ámbito: cinco centros de Montevideo, del subsector público y privado con cobertura de 800.000 habitantes. Pacientes y métodos: 153 pacientes que ingresaron con diagnóstico de SS y ShS a las unidades de cuidados intensivos (UCI) de forma consecutiva. Variables de interés principales: aquellas relacionadas con características del paciente y episodio de sepsis, medidas diagnósticas y terapéuticas según la CSS en las primeras 48 horas, y pronósticas en UCI, hospital y a los seis meses. Resultados: se incluyeron 153 pacientes, la mediana de edad fue 68 años, la de Acute Physiology and Chronic Health Evaluation (APACHE II) fue de 24; 73,9% recibieron asistencia respiratoria mecánica (ARM), con una mediana de 8 días. La mediana de estadía en CTI fue de 12 y la de estadía hospitalaria fue de 19 días. De los episodios de SS, ShS, 69,3% de los casos fue comunitario; 77,8% presentó shock, y 37,9% inmunodebilidad-inmunocompromiso. Predominó la sepsis de origen respiratorio en 30,1%, se aisló microorganismos en 64,1%, siendo bacterianas 95,9%. La mortalidad en CTI fue 49,7%, hospitalaria 54,9% y a seis meses 58,8%. Se asociaron a mayor mortalidad hospitalaria: edad, APACHE II, inmunodebilidad-compromiso, demoras de ingreso a UCI e inicio de antimicrobianos y balance positivo. Conclusiones: los pacientes ingresan a UCI con formas severas o estado biológico comprometido. Existen demoras y limitaciones en el diagnóstico y terapéutica inicial, situaciones que se asocian a mayor mortalidad hospitalaria.

Abstract Objective: to learn about the epidemiological characteristics of patients who are admitted for severe sepsis (SS) and septic shock (Ssh); to assess the implementation of recommendations in the Surviving Sepsis Campaign and to determine variables associated to a bad vital prognosis. Design: prospective, observational study, single cohort, multi-center, conducted in five centers in Montevideo, the public and private sub-sector with coverage for 800,000 inhabitants during one year (September 2011- August 2012). Method: 153 patients who were consecutively admitted with a SS and Ssh diagnosis in the intensive care units. Main relevant variables: those related to characteristics of patients themselves and the sepsis episode, diagnostic and therapeutic measures according to the Surviving Sepsis Campaign in the first 48 hours, and prognostic in the ICU, the hospital and six months later. Results: 153 patients were included, average age was 68 years old and APACHE II 24; 73.9 % of patients needed mechanic ventilation during an average of 8 days. Median length of stay in the ICU was 12 and median hospital stay was 19 days. 69.3% of sepsis were community acquired, 77.8% evidenced shock and 37.9% presented immune deficiency were immunocompromised. Respiratory origin prevailed in 30.2% of patients and in 64.1% of patients the microorganism was identified, bacteria being 95.9% of cases. Mortality in the ICU was 49.7%, in the hospital it was 54.9% and 58.8%. The following were associated to a greater hospital mortality: APACHE II, immune-deficiency, delays in admittance to the ICU and initiation of antimicrobial, and positive balance.

Resumo Objetivo: conhecer as características epidemiológicas dos pacientes admitidos por Sepse Severa (SS) e Choque Séptico (ShS); avaliar a implementação das recomendações da Campanha Sobreviver à Sepse (CSS) e determinar variáveis associadas com mal prognóstico vital. Estudo: prospectivo, observacional, coorte única, multicêntrico, realizado em cinco centros, dos setores público e privado, de Montevidéu, com cobertura de 800.000 habitantes, no período setembro 2011 - agosto 2012. Pacientes e métodos: pacientes com diagnóstico de SS e ShS admitidos, em forma consecutiva, nas Unidades de Cuidados Intensivos (UCI). Foram estudadas as variáveis relacionadas com as características do paciente e com o episódio de sepse, as medidas diagnósticas e terapêuticas segundo a CSS nas primeiras 48 horas, e as prognósticas na UCI, no hospital e aos 6 meses. Resultados: foram incluídos 153 pacientes; a mediana de idade foi 68 anos e de APACHE II 24; em 73,9% dos pacientes foi feita assistência respiratória mecânica - ARM, com uma mediana de 8 dias. As medianas de dias de permanência foram 12 dias na UCI e 9 no hospital. 69.3% das Sepses foram comunitárias, 77,8% apresentaram choque e 37,9% imunodebilidade-imunocompromisso. Na maioria dos pacientes a origem foi respiratória (30,1%) e foi possível isolar o microrganismo em 64,1%, sendo bactérias em 95,9% dos casos. A mortalidade na UCI foi de 49,7%, a hospitalar 54,9% e aos 6 meses 58,8%. Estavam associados a maior mortalidade hospitalar: idade, APACHE II, imunodebilidade-compromisso, demora na admissão a UCI e início de antimicrobianos, e balance positivo. Conclusões: os pacientes foram admitidos nas UCI com formas severas de sepse e/ou estado biológico comprometido. Existem demoras e limitações no diagnóstico e na terapêutica inicial, situações que estão associadas a maior mortalidade hospitalar.

Ceftriaxone and ciprofloxacin restriction in an intensive care unit: less incidence of Acinetobacter spp. and improved susceptibility of Pseudomonas aeruginosa / Restricción del uso de ceftriaxona y ciprofloxacino en una unidad de cuidados intensivos: menor incidencia de Acinetobacter spp. y mayor sensibilidad de Pseudomonas aeruginosa

Objective. To determine whether restricting the use of ceftriaxone and ciprofloxacin could significantly reduce colonization and infection with resistant Gram-negative bacilli (r-GNB). Methods. A two-phase prospective study (before/after design) was conducted in an intensive care unit in two time periods (2004–2006). During phase 1, there was no antibiotic restriction. During phase 2, use of ceftriaxone or ciprofloxacin was restricted. Results. A total of 200 patients were prospectively evaluated. In phase 2, the use of ceftriaxone was reduced by 93.6% (P = 0.0001) and that of ciprofloxacin by 65.1% (P = 0.041), accompanied by a 113.8% increase in use of ampicillin-sulbactam (P = 0.002). During phase 1, 48 GNB were isolated [37 r-GNB (77.1%) and 11 non-r-GNB (22.9%)], compared with a total of 64 during phase 2 [27 r-GNB (42.2%) and 37 non-r-GNB (57.8%)] (P = 0.0002). Acinetobacter spp. was isolated 13 times during phase 1 and 3 times in phase 2 (P = 0.0018). The susceptibility of Pseudomonas aeruginosa to ciprofloxacin increased from 40.0% in phase 1 to 100.0% in phase 2 (P = 0.0108). Conclusions. Restriction of ceftriaxone and ciprofloxacin reduced colonization byAcinetobacter spp. and improved the susceptibility profile of P. aeruginosa.

Objetivo. Determinar si la restricción del uso de ceftriaxona y ciprofloxacino reduce significativamente la colonización y la infección por bacilos gramnegativos resistentes. Métodos. Se efectuó un estudio prospectivo de dos fases (diseño antes/después de la intervención) en una unidad de cuidados intensivos en dos períodos sucesivos entre los años 2004 y 2006. Durante la fase 1, no hubo ninguna restricción de antibióticos. Durante la fase 2, se restringió el uso de ceftriaxona y ciprofloxacino. Resultados. Se evaluó prospectivamente a 200 pacientes en total. En la fase 2, el uso de ceftriaxona se redujo en 93,6% (P = 0,0001) y el de ciprofloxacino en 65,1% (P = 0,041), lo que se acompañó de un aumento de 113,8% en el uso de ampicilina/sulbactam (P = 0,002). Durante la fase 1, se aislaron 48 bacilos gramnegativos (37 resistentes [77,1%] y 11 no resistentes [22,9%]), en comparación con un total de 64 durante la fase 2 (27 resistentes [42,2%] y 37 no resistentes [57,8%]) (P = 0,0002). Se aisló Acinetobacter spp. 13 veces durante la fase 1 y 3 veces en la fase 2 (P = 0,0018). La sensibilidad de Pseudomonas aeruginosa al ciprofloxacino aumentó de 40,0% en la fase 1 a 100,0% en la fase 2 (P = 0,0108). Conclusiones. La restricción del uso de ceftriaxona y ciprofloxacino redujo la colonización por Acinetobacter spp. y mejoró el perfil de sensibilidad de P. aeruginosa.

Ceftriaxone and ciprofloxacin restriction in an intensive care unit: less incidence of Acinetobacter spp. and improved susceptibility of Pseudomonas aeruginosa.

OBJECTIVE: To determine whether restricting the use of ceftriaxone and ciprofloxacin could significantly reduce colonization and infection with resistant Gram-negative bacilli (r-GNB). METHODS: A two-phase prospective study (before/after design) was conducted in an intensive care unit in two time periods (2004-2006). During phase 1, there was no antibiotic restriction. During phase 2, use of ceftriaxone or ciprofloxacin was restricted. RESULTS: Atotal of 200 patients were prospectively evaluated. In phase 2, the use of ceftriaxone was reduced by 93.6% (P = 0.0001) and that of ciprofloxacin by 65.1% (P = 0.041), accompanied by a 113.8% increase in use of ampicillin-sulbactam (P = 0.002).During phase 1, 48 GNB were isolated [37 r-GNB (77.1%) and 11 non-r-GNB (22.9%)], compared with a total of 64 during phase 2 [27 r-GNB (42.2%) and 37 non-r-GNB (57.8%)](P = 0.0002). Acinetobacter spp. was isolated 13 times during phase 1 and 3 times in phase 2 (P = 0.0018). The susceptibility of Pseudomonas aeruginosa to ciprofloxacin increased from 40.0% in phase 1 to 100.0% in phase 2 (P = 0.0108). CONCLUSIONS: Restriction of ceftriaxone and ciprofloxacin reduced colonization by Acinetobacter spp. and improved the susceptibility profile of P. aeruginosa.

Prospective study of risk factors for ventilator-associated pneumonia caused by Acinetobacter species.

UNLABELLED: The incidence of ventilator-associated pneumonia (VAP) by Acinetobacter spp (VAPA) is increasing and has high morbidity and mortality. It is imperative to identify risk factors to be able to use prevention policies. OBJECTIVE: The aim of this study was to identify specific risk factors for VAPA. DESIGN: Prospective cohort study. INTERVENTIONS: None. SETTING: Two medical-surgical intensive care units. MEASUREMENTS: During a period of 36 months, all patients with more than 48 hours on mechanical ventilation and suspected of having a VAP were enrolled. Only VAP with microbiological confirmation was analyzed. RESULTS: Two hundred eighteen consecutive patients with clinical suspicion of VAP were enrolled. One hundred twenty-five VAPs were confirmed by culture--46 by Acinetobacter spp and 79 by other pathogens. The 36 potential risk factors for Acinetobacter spp were analyzed by univariate analysis. Logistic regression identified previous use of ceftriaxone (relative risk, 5.1; 95% confidence interval, 1.47-17.82) and previous use of ciprofloxacin (relative risk, 9.1; 95% confidence interval, 2.29-36.63) as significant independent predictors for the development of VAPA. CONCLUSIONS: Previous use of ceftriaxone and ciprofloxacin are independent risk factors for the development of VAPA.