• Yali Zhao, Jie Geng, Xing Wu, Suiting Xiong, Liwei Wang, Juanxia Wang, Haijv Ma, Fengxian Wei, and Zhihong Wei.
• Lanzhou University Second Hospital.
• Medicine (Baltimore). 2020 Dec 11; 99 (50): e23726e23726.

BackgroundMedium-long catheters are being used more and more widely in clinical practice, but we still do not know the impact of different placements, but this is an important clinical issue that cannot be ignored.ObjectiveAt present, the tip positioning of the mid-length catheter mainly includes the anterior part of the axilla and the midclavicular line. Different positioning may have different effects. Therefore, we did this research to confirm which positioning is more safety.MethodsWe systematically searched the Chinese and English databases: PubMed, Embase, CENTRAL, CINAHL, Web of Science, China Knowledge Network, China Biomedical Literature Database, VIP, Wan Fang. Literature screening, data extraction, and quality evaluation were carried out by 2 researchers, and finally, use Stata to carry out meta-analysis.ResultsThis study is ongoing and the results will be submitted to a peer-reviewed journal for publication.Ethics And DisseminationEthical approval is not applicable, since this is an overview based on published articles.Protocol Registration NumberINPLASY2020110042.

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