ABSTRACT Purpose: To evaluate a biofilm model of Pseudomonas aeruginosa in excisional cutaneous wound in mice. Methods: Preclinical, translational study conducted with 64 C57BL/6 mice randomly assigned to control and intervention groups. Evaluation was on days D0, D3, D5, D7 and D10 of wound making. The profile of biofilm formation and induction was evaluated using wound closure kinetics, quantitative culture, and evaluation of wounds using transmission electron microscopy (TEM). Clinical evaluation was performed by liver tissue culture, weight variation, and quantification of leukocytes in peripheral blood. Analyses were performed with GraphPad Prism software. Results: Bacterial load for induction of infection with P. aeruginosa and survival of animals was 104 UFC·mL-1. In D5 (p < 0.0001) and D7 (p < 0.01), animals in the intervention group showed a delay in the healing process and had their wounds covered by necrotic tissue until D10. Statistical differences were observed in wound cultures and weight at D5 and D7 (p < 0.01). Liver cultures and leukocyte quantification showed no statistical differences. No bacteria in planktonic or biofilm form were identified by TEM. Conclusions: The findings raise questions about the understanding of the ease of formation and high occurrence of biofilm in chronic wounds.

ABSTRACT Purpose: To analyze the influence of occlusive dressing on the healing of excisional skin wounds in mice. Methods: Pre-clinical, comparative, and translational study. Mice were divided into three experimental groups: wounds occluded with hydrocolloid (HD) dressings, transparent polyurethane film (TF) dressings, and without occlusion (WO), monitored at three, six and 14 days, with eight animals each. Closure rate, infiltration of neutrophils and macrophages, measurement of tumor necrosis factor-α (TNF-α) and vascular endothelial growth factor (VEGF) and, histologically, angiogenesis were evaluated. Results: Wound closure was accelerated in the occlusive groups. There was a decrease in TNF-α levels in the HD group when compared to the WO and TF groups. Neutrophils accumulation decreased in the HD group. Increased dosages of macrophages were evidenced in the HD group, compared to the WO and TF groups. Levels of VEGF were increased in the TF and HD groups. Conclusions: It is suggested that the occlusion of wounds modulates the inflammatory response.

RESUMO Objetivos Estimar incidência, determinar fatores de risco e propor modelo de predição de risco para desenvolvimento de dermatite associada a incontinência em pacientes adultos críticos. Método Trata-se de um estudo de coorte concorrente realizado com 157 pacientes críticos. A coleta de dados foi conduzida diariamente entre fevereiro e julho de 2015 em hospital público e de ensino de Belo Horizonte, MG. Os dados foram lançados em banco de dados, submetidos a análise descritiva de sobrevida e multivariada. Resultados Obteve-se uma incidência global de 20,4%. Foram encontrados 19 fatores de risco que apresentaram associação significativa com o problema. As variáveis encontradas no modelo de predição de risco foram: sexo masculino, trauma, uso de hipnótico/sedativos, lactulona, suporte nutricional, fezes pastosas e queixa de ardência (local). Conclusão Os resultados mostraram que a dermatite é um achado clínico comum em pacientes adultos críticos e merece atenção especial para maior qualidade da assistência de enfermagem.

ABSTRACT Objectives Estimate incidence, determine risk factors and propose a prediction model for the development of incontinence- associated dermatitis critically ill adult patients. Method Concurrent cohort study with 157 critically ill patients. Data collection was daily performed between February and July 2015, at a public teaching hospital of Belo Horizonte, Minas Gerais. Data was entered in a database and subjected to descriptive, survival and multivariate analysis. Results An overall incidence of 20.4% was obtained. Nineteen (19) risk factors significantly associated with the disorder were found. The variables identified in the risk prediction model were male, trauma, use of hypnotics/sedatives, lactulose, nutritional support, loose stools and complaints of burning. Conclusion The results showed that dermatitis is a common clinical finding in critically ill adult patients and requires special attention from the nursing staff.

RESUMEN Objetivos Estimar incidencia, determinar factores de riesgo y proponer modelo de predicción de riesgo para el desarrollo de la dermatitis asociada a la incontinencia en pacientes adultos críticos. Método Se trata de un estudio de cohorte concurrente de 157 pacientes críticamente enfermos. La recolección de datos se realizó diariamente entre febrero y julio de 2015, en un hospital público y de enseñanza de Belo Horizonte-MG. Los datos se introdujeron en la base de datos, sometidos a análisis descriptivo, de supervivencia y multivariada. Resultados Se obtuvo una incidencia global del 20,4%. Se encontraron 19 factores de riesgo asociados significativamente con el problema. Las variables identificadas en el modelo de predicción de riesgo fueron: sexo masculino, trauma, uso de hipnóticos/sedantes, lactulona, soporte nutricional, heces sueltas y queja de ardor (local). Conclusión Los resultados mostraron que la dermatitis es un hallazgo clínico frecuente en pacientes adultos críticos y merece una atención especial para una mayor calidad de los cuidados de enfermería.

ABSTRACT Objectives Estimate incidence, determine risk factors and propose a prediction model for the development of incontinence- associated dermatitis critically ill adult patients. Method Concurrent cohort study with 157 critically ill patients. Data collection was daily performed between February and July 2015, at a public teaching hospital of Belo Horizonte, Minas Gerais. Data was entered in a database and subjected to descriptive, survival and multivariate analysis. Results An overall incidence of 20.4% was obtained. Nineteen (19) risk factors significantly associated with the disorder were found. The variables identified in the risk prediction model were male, trauma, use of hypnotics/sedatives, lactulose, nutritional support, loose stools and complaints of burning. Conclusion The results showed that dermatitis is a common clinical finding in critically ill adult patients and requires special attention from the nursing staff.

RESUMEN Objetivos Estimar incidencia, determinar factores de riesgo y proponer modelo de predicción de riesgo para el desarrollo de la dermatitis asociada a la incontinencia en pacientes adultos críticos. Método Se trata de un estudio de cohorte concurrente de 157 pacientes críticamente enfermos. La recolección de datos se realizó diariamente entre febrero y julio de 2015, en un hospital público y de enseñanza de Belo Horizonte-MG. Los datos se introdujeron en la base de datos, sometidos a análisis descriptivo, de supervivencia y multivariada. Resultados Se obtuvo una incidencia global del 20,4%. Se encontraron 19 factores de riesgo asociados significativamente con el problema. Las variables identificadas en el modelo de predicción de riesgo fueron: sexo masculino, trauma, uso de hipnóticos/sedantes, lactulona, soporte nutricional, heces sueltas y queja de ardor (local). Conclusión Los resultados mostraron que la dermatitis es un hallazgo clínico frecuente en pacientes adultos críticos y merece una atención especial para una mayor calidad de los cuidados de enfermería.

RESUMO Objetivos Estimar incidência, determinar fatores de risco e propor modelo de predição de risco para desenvolvimento de dermatite associada a incontinência em pacientes adultos críticos. Método Trata-se de um estudo de coorte concorrente realizado com 157 pacientes críticos. A coleta de dados foi conduzida diariamente entre fevereiro e julho de 2015 em hospital público e de ensino de Belo Horizonte, MG. Os dados foram lançados em banco de dados, submetidos a análise descritiva de sobrevida e multivariada. Resultados Obteve-se uma incidência global de 20,4%. Foram encontrados 19 fatores de risco que apresentaram associação significativa com o problema. As variáveis encontradas no modelo de predição de risco foram: sexo masculino, trauma, uso de hipnótico/sedativos, lactulona, suporte nutricional, fezes pastosas e queixa de ardência (local). Conclusão Os resultados mostraram que a dermatite é um achado clínico comum em pacientes adultos críticos e merece atenção especial para maior qualidade da assistência de enfermagem.