摘要:Contact with objects and people in the hospital environment promotes the spread of germs that threaten patients; hand washing is a key strategy to prevent infections. Adherence to hand washing of health care officials was measured according to the Five Moments of Hand Hygiene of the WHO (World Health Organization). This transversal and quantitative study evaluated the adherence to hand washing in outpatient and emergency personnel of Assbasalud ESE, as well as the impact after receiving training. It was conducted in three phases: pre-training, training and posttraining. The final sample was 128 employees in nine bank suite’s (30%). The adhesion measurement was approved by the Executive Quality Committee of Assbasalud ESE. The factors that were evaluated were: hand hygiene, use of nail polish and use of jewels, as well as the relevance of the substances used for aseptic. The overall adherence of hand washing in phase one was of 61.8% and for the second phase, of 78.3%. These are positive results with reference to national and international studies. It was concluded that hand washing, valued at 67.1% during the third quarter of 2013, is an excellent strategy to reinforce patient safety and to prevent hospital infections.