Estratégias de manutenção de equipamentos hospitalares por meio do mean time between failures. / Hospital medical equipment maintenance schedules using the mean time between failures.

O objetivo deste estudo foi definir uma metodologia para a definição de intervalos de contratos de manutenção e recomendações gerais em um grande hospital da cidade do Rio de Janeiro, Brasil. A confiabilidade de 161 dispositivos de monitoramento e tratamento cardíaco foi estudada por meio de quatro indicadores de suas condições de uso. Esses indicadores, juntamente com o ano de fabricação do equipamento, foram usados como preditores em um modelo de regressão logística que teve como desfecho a ocorrência de falha no equipamento. A seguir, o Mean Time Between Failures (MTBF) foi estimado para os indicadores apontados como relevantes pelo modelo. Apenas uma variável (intensidade de uso) foi considerada estatisticamente significante no modelo preditivo final. O MTBF, de acordo com as categorias dessa variável (baixo-médio-alto), tiveram valores compreendidos entre 121,3 (baixo) e 5,8 (alto) dias. Os resultados indicam grandes inadequações nos períodos de contratos de manutenção utilizados pelo hospital e sugerem que estratégias de manutenção mais eficientes seriam períodos de inspeção compatíveis com os intervalos de MTBF identificados.

The objective of this study was to define a methodology to assist the definition of maintenance contract intervals and overall recommendations for a large hospital in the city of Rio de Janeiro, Brazil. The reliability of 161 cardiac monitoring and treatment devices was studied. Four indicators of equipment use conditions were developed, and, along with the year of manufacture of the equipment, were used as predictors in a logistic regression that had the occurrence of failure as outcome. The mean time between failures (MTBF) was then estimated for the categories of the indicators deemed relevant by the regression. Only one variable (intensity of use) was statistically significant in the final predictive model, and the MTBF, according to each category of this variable (low-average-high), ranged from 121.3 (low) to 5.8 days (high). The results indicated large inadequacies in the maintenance contract periods used by the hospital and suggested that a much better maintenance strategy would be the inspection periods compatible with the identified MTBF intervals.

Failure Causes Analyses and Corrective Actions of Two Different Types of Bowie-Dick Test Pack / 中华医院感染学杂志

OBJECTIVE To analyze the monitoring performance and testing efficacy and reliability of standardized disposable B-D test pack and standard linen test pack,and summarize the corrective actions based on failure analyses for future reference.METHODS The two different test packs were employed to evaluate the vacuum performance of dynamic air removal sterilizer.RESULTS We enrolled 400 standardized disposable B-D test packs and standard linen test packs respectively.The disposable pack failed 4 cases with the success ratio 99%,while the linen pack failed 30 cases with the success ratio 92.5%.CONCLUSIONS The poor conformity of hand-made linen test pack,variation of steam pressure,sterilizer failure,and unprofessionalism of sterilizer operator contribute as main failure causes in B-D test.Standardized disposable B-D test pack can decrease subjective factors significantly,and the test results are more reliable and standardized.