How to improve medical quality and reduce medical disputes has become a major issue in clinical and nonclinical departments at all levels of hospital. The paper puts forward a proposal of “Three lines of defense” concerning medical quality and safety, which plays a positive role in prevention of medical errors, in improvement of medical quality and patient safety.医院如何提高医疗质量，减少医疗纠纷，成为各级医院及临床与非临床科室所面临的重大课题。本文通过医疗质量与安全大讨论活动，提出了确保医疗安全的“三道防线”。 对预防医疗差错，提高医疗质量，保障病人的安全起到了积极的作用
