摘要目的:通过系统检索、评价与总结关于成年人鼻胃管留置长度测量方法的研究证据，为临床护理实践提供依据。方法:计算机检索Cochrane Library（CD-SR、DARE）、Joanna Briggs（JBI）、PubMed（MEDLINE）、Web of Science电子数据库、中国生物医学文献数据库（CBM）、万方数据库、中国知网等，检索时间从建库至2018年12月。由2名研究者独立文献质量进行评价和数据资料的提取。结果:本研究共纳入9篇文献，推荐的测量插入胃管长度的解剖标志包括XNE、NEX、XJN、Hanson方法、GWNUF模型、耳垂至剑突至肚脐-鼻尖至耳垂、NEX+10 cm共7种测量方法，Hanson方法、GWNUF模型、XEN + 10 cm 3种测量方法得出的鼻胃管的尖端及其所有侧孔定位均在胃中的可能性更大。结论:NEX虽然是目前被广泛应用于临床的一种外部测量方法，但被证明是不够准确以及存在相当大的风险，因此应谨慎选择测量鼻胃管插入长度的方法在实践中的教授或使用。

abstractsObjective:To systematically retrieve, evaluate and summarize the research evidence on the measurement method of adult nasogastric tube indwelling length and provide a basis for clinical nursing practice.Methods:To search for Cochrane Library(CD-SR, DARE), Joanna Briggs(JBI), PubMed (MEDLINE), Web of Science electronic database, China Biomedical Literature Database (CBM), Wanfang Database, China Knowledge Network from the establishment of the database to December 2018. Two researchers independently evaluated the quality of the literature and extracted the data.Results:A total of 9 articles were included in the study. The recommended anatomical landmarks for measuring the length of the inserted gastric tube included XNE, NEX, XJN, Hanson method, GWNUF model, earlobe to xiphoid to navel-nose tip to earlobe NEX 10 cm. The tip of the nasogastric tube and all its lateral hole locations obtained by the Hanson method, the GWNUF model, and the XEN 10 cm method were more likely to be located in the stomach.Conclusion:Although NEX is an external measurement method that is widely used in clinical practice, it has proven to be insufficiently accurate and has considerable risks. Therefore, the method of measuring the length of the nasogastric tube insertion should be carefully selected for teaching or use in practice.