Objective: To explore the effect and significance of medical dispute mediation committee as third party participating in pre - operative testimony mechanism. Methods: For 116 operations from Oct 2015 to May 2017, the medical dispute mediation committee as third party witnessed preoperative communication to patients and their families and signature, and we put forward suggestions for risk guarantee. Results: There were no medical disputes in any of the witness case, of which 43 cases purchased medical accident insurance and achieved risks transfer. Conclusion: Medical dispute mediation committee as third party participating in pre - operative testimony mechanism helps both doctors and patients clear risks, supervises the fulfillment of informed consent, promotes the landing of medical accident insurance, and achieves the recognition and transformation of medical risks.

Depression is a common emotional disorder, which has high incidence rate and mortality worldwide. Ascorbic acid (AA) is also known as vitamin C. As a kind of reducing vitamin, AA participates in anti-oxidation, enzyme assistance and neuro-modulation in the central nervous system. Clinical evidence and animal studies show that AA has anti-depressant effect. This article reviews the function of AA in the nervous system, the current researches on relation between AA and depression, and possible mechanism, and analyzes its therapeutic significance in this disease, hoping to provide new ideas for the clinical treatment of depression.