Accidentes percutáneos con riesgo biológico, producidos por dispositivos de seguridad en la Comunidad de Madrid

since the implementation in 2006 of security procedures and a surveillance system of biological accidents in madrid public health services, an increase of percutaneus accidents related to the use of safety devices has been observed. with the purpose of studying the external factors to the production of accidents with these new devices, there is realized a prospective, longitudinal and descriptive study of the accidents happened throughout six months (2010-2011). 378 accidents are included, 86% happened in women, the incidence rate being 14.3 accidents per thousand in nurses, and 3.1 in doctors. subcutaneous needles were the most implied (25.7%). in 6.6% of accidents, the safety mechanisms had been intentionally deactivated, and only 2.6% could be attributed to device failure. external contributing factors include "time pressure/ high work rate" (46.5%) and "to realize the process in inconvenient positions" (31.5%). the interventions to prevent biological accidents must be specific in each professional category and area of work. it is necessary to continue with the introduction of safety devices, to identify factors that are related and to implement individualized actions that minimize the risks.