Objective To investigate the timing of administration of Conbercept in the treatment of proliferative diabetic retinopathy (PDR) before operation and its effect on neovascularization vascular endothelial growth factor (VEGF).Methods 90 patients (90 eyes) with PDR who underwent vitrectomy (PPV) were randomly divided into groups A,B and C,with 30 cases in each group.Group A received no intravitreal injection of Conbercept before operation,group B received intravitreal injection of Conbercept 3 days before operation,and group C received intravitreal injection of Conbercept 5 days before operation.The operation condition,visual acuity level,concentration of vascular endothelial growth factor in aqueous humor and positive expression of vascular growth factor in neovascularization membrane were compared in the three groups.Results There was no significant difference in the incidence of iatrogenic hiatus during operation,transient high intraocular pressure and hyphema after operation in the three groups (P ＞ 0.05).Compared with group A,group B and C had shorter the operation time,less electrocoagulation,lower LogMAR BCVA (best corrected visual acuity) three months after operation (P ≤ 0.05).There was no significant difference in the concentration of vascular endothelial growth factor between group B and group C before vitreous injection (P ＞ 0.05).The expression of VEGF in aqueous humor of group B and group C was lower than that of group A (P ≤ 0.05),and the total positive expression rate of VEGF in neovascularization membrane of group B and group C was 76.67％ and 73.33％ respectively,lower than that of group A (100.0％,P ≤0.05).The vitreous re-bleeding of group B and group C was 6.67％ and 10.0％,lower than that of group A (32.14％,P ≤ 0.05).While there was no significant difference between group B and group C (P ＞0.05).Conclusions Vitreous injection of Conbercept before PPV in PDR patients can reduce the concentration of VEGF in aqueous humor and the positive expression rate of VEGF in neovascularization membrane,significantly improve visual acuity and reduce the incidence of postoperative complications.The effect of vitreous injection 3 and 5 days before PPV is basically the same.

Objective:To monitor the effects of intervention and management on the quality of life and the incidence of cardiovascular events in patients with chronic heart failure in the community setting.Methods:Based on questionnaire data, 200 patients with chronic heart failure in the community were randomly divided into an observation group and a control group, with 100 cases in each group.The control group was followed up for routine health information collection at home, while the observation group received standardized community intervention for patients with chronic heart failure.The awareness rate of heart failure, rate of patients receiving drug treatment, rate of standardized drug utilization, cardiac function, satisfaction with quality of life and incidence of cardiovascular events were compared between the two groups.Results:Scientific intervention for community-dwelling patients with chronic heart failure was able to significantly improve standardized drug usage and quality of life( P<0.05).Compared with the control group, patients in the observation group showed a significantly lower probability of cardiovascular events and more favorable results measured with parameters such as blood pressure, blood glucose and heart rate after intervention.Especially noteworthy was that the effective control rate of blood pressure in the observation group reached 72.4%, which was much higher than 45.9% in the control group( χ2=14.543, P<0.05), the effective control rate of blood glucose in the observation group reached 69.4%, which was much higher than 32.7% in the control group( χ2=12.588, P<0.05), and the effective control rate of heart rate in the observation group(80.6%)was much higher than in the control group(53.1%)( χ2=13.137, P<0.05).The observation group also had better results than the control group in quitting smoking, eating a low-salt, low-fat diet, and regularly measuring blood pressure, blood glucose and body fat percentage.The MNLF score in the control group(31.21±3.01)was higher than that in the observation group(22.66±2.87), and the difference was statistically significant( t=7.26, P<0.05).The LiHFe score in the control group(39.85±6.09)was lower than that in the observation group(71.36±4.32), and the difference was statistically significant( t=18.44, P<0.05).The observation group had lower readmission frequency(46.9% vs.29.6%)and incidence of cardiovascular events(56.1% vs.31.6%)than the control group and the difference was statistically significant( χ2=12.64, 15.01, both P<0.05). Conclusions:The establishment of community intervention and management for patients with chronic heart failure can significantly improve the awareness rate of heart failure, rate of drug treatment, rate of standardized drug usage, self-management ability and quality of life, and reduce the incidence of cardiovascular events.The practice should be promoted in communities.