Infección de sitio quirúrgico en un servicio de cirugía general. Análisis de cinco años y valoración del índice National Nosocomial Infection Surveillance (NNIS)

The NNIS index is a valid instrument for classifying surgical patients according to the risk of developing an SSI. Of the three components, the length of the intervention has the greatest influence on increasing the risk of infection. The NNIS categories also distinguish different levels of risk of infection.