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目的:对改良型活动方式预防肿瘤患者PICC相关性血栓的有效性进行Meta分析。方法:计算机检索PubMed、The Cochrane Library、CNKI、万方数据库、维普网2010年1月1日—2019年12月31日收录的肿瘤患者改良型活动方式与PICC相关性血栓的研究，由2名研究者独立筛选文献和提取资料，并进行文献质量评估。采用RevMan 5.3软件对纳入研究进行Meta分析。结果:共纳入7个RCT研究。Meta分析结果显示，与常规置管侧上肢运动组相比，改良型活动方式组肿瘤患者的导管相关性静脉血栓发生率降低（n OR=0.22，95%置信区间0.13~0.38，n P<0.01），腋静脉最大血流速度增加（n MD=1.03，95%置信区间0.64~1.42，n P<0.01）。n 结论:置管侧肢体进行改良型活动能够有效加快肿瘤患者PICC置管后腋静脉血流速度，减少导管相关性静脉血栓发生。“,”Objective:To conduct Meta-analysis of the effectiveness of improved activity mode in prevention of peripherally inserted central catheter (PICC) related thrombosis in tumor patients.Methods:PubMed, The Cochrane Library, CNKI, Wanfang Database and VIP database were conducted computer retrieval of studies on improved activity mode and PICC related thrombosis in tumor patients from January 1, 2010 to December 31, 2019. A total of two researchers independently screened literature, extracted data and evaluated the quality of literature. The RevMan 5.3 software was used for Meta-analysis of the included studies.Results:A total of 7 randomized controlled trials (RCT) were included in this study. Meta-analysis results showed that compared with the conventional catheterization side upper limb exercise group, the incidence of catheter-related venous thrombosis in tumor patients in the improved activity mode group was reduced (n OR=0.22, 95%n CI=0.13-0.38, n P<0.01) , and the maximum blood flow velocity of the axillary vein was increased (n MD=1.03, 95%n CI=0.64-1.42, n P<0.01) .n Conclusions:Improved activities on the limb of catheterization can effectively accelerate the blood flow velocity of the axillary vein after PICC catheterization in tumor patients and reduce the occurrence of catheter-related venous thrombosis.