Hanson R L
JPEN J Parenter Enteral Nutr. 1979 May-Jun;3(3):160-3. doi: 10.1177/014860717900300310.
This study was aimed at identifying non-invasive techniques and criteria for predicting the proper length for insertion of a nasogastric tube for tube feeding so that the tube tip would be located in the fundus or body for the stomach. A review of literature and existing practices revealed unsubstantiated and discrepant methods currently in use and justified the need for this research. The study involved relating several external body measurements to a measurement from the tip of the nose to the lower esophageal sphincter, via the esophagus, in 99 adult cadavers and 5 normal adult volunteers. A variety of analyses including stepwise multiple regression, were used and are presented. A formula is presented and is stated to provide a 91% confidence level of tube tip placement in the stomach between 1 and 10 cm. This is compared to a confidence level of 72% using the traditional nose to ear to xiphoid measurement. The formula is ( (NEX-50cm) /2)) + 50cm where NEX is the distance from the tip of the nose to the earlobe to the xiphoid. Two methods for simple mechanical clinical application are described.
本研究旨在确定预测鼻饲用鼻胃管合适插入长度的非侵入性技术和标准，以使管端位于胃底或胃体。对文献和现有做法的回顾揭示了目前使用的未经证实且相互矛盾的方法，证明了本研究的必要性。该研究涉及在99具成年尸体和5名正常成年志愿者中，将几种外部身体测量值与从鼻尖经食管到食管下括约肌的测量值相关联。使用了包括逐步多元回归在内的多种分析方法并进行了展示。给出了一个公式，据称该公式可使管端置于胃内1至10厘米之间的置信水平达到91%。与之相比，使用传统的鼻尖到耳垂再到剑突测量法的置信水平为72%。该公式为（（鼻尖到耳垂到剑突的距离 - 50厘米）/2）+ 50厘米，其中鼻尖到耳垂到剑突的距离用NEX表示。描述了两种简单的机械临床应用方法。
