Abstract：
Background: Orogastric (OG) and nasogastric (NG) tubes are frequently used in the NICU. Obtaining a relatively accurate estimated length before insertion could significantly reduce complications. While previous studies have mainly focused on the NG tube, OG tubes are more commonly used in China. Purpose: The objective was to determine whether there were differences in the rate of accurate placement among the adapted nose-ear-xiphoid (NEX) method, nose-ear-midway to the umbilicus (NEMU) method, and weight-based (WB) equation in estimating the OG tube insertion distance. Methods: A randomized, controlled, open-label clinical trial to compare the three methods was conducted in a single center. After enrollment, newborns were randomly assigned into three groups. By radiological assessment, the anatomical region for OG tube placement was analyzed. The primary metric was the tip within the gastric body, and the second metric was strictly accurate placement defined as the tube was not looped back within the stomach and the end was located more than 2 cm but less than 5 cm into the stomach, referred to as T10. Results: This study recruited 156 newborns with the majority being preterm infants (n = 96; 61.5 percent), with an average birth weight of 2,200.8 ± 757.8 g. For the WB equation, 96.2 percent (50 cases) of the OG tubes were placed within the stomach, and the rates were 78.8 percent (41 cases) in the adapted NEX and NEMU methods. The strictly accurate placement rates were highest for the WB equation at 80.8 percent (42/52), followed by the adapted NEX method at 65.4 percent (34/52), and the NEMU method at 57.7 percent (30/52). Conclusion: The WB equation for estimating the insertion depth of the OG tube in newborn infants resulted in more precise placement compared to the adapted NEX and NEMU methods.
摘要：
背景：NICU中经常使用口胃（OG）和鼻胃（NG）管。在插入之前获得相对准确的估计长度可以显着减少并发症。虽然以前的研究主要集中在NG管，OG管在中国更常用。目的：目的是确定适应的鼻-耳-剑突（NEX）方法之间的准确放置率是否存在差异，鼻耳至脐部（NEMU）方法，和基于权重的(WB)方程估计OG管插入距离。方法：随机，控制,在一个中心进行了开放标签临床试验,比较了三种方法.注册后，新生儿被随机分为三组。通过放射学评估，分析了OG管放置的解剖区域.主要指标是胃体内的尖端，第二个度量标准是严格准确的放置，定义为管子没有环回胃内，末端位于胃内超过2厘米但不到5厘米，称为T10。结果：这项研究招募了156名新生儿，其中大多数是早产儿（n=96;61.5％），平均出生体重为2,200.8±757.8g。对于WB方程，96.2％（50例）的OG管放置在胃内，采用NEX和NEMU方法的比率为78.8%(41例)。严格准确的安置率最高，为WB方程的80.8%(42/52)，其次是适应的NEX方法，占65.4%(34/52)，NEMU方法为57.7%（30/52）。结论：与适应的NEX和NEMU方法相比，用于估计新生儿OG管插入深度的WB方程可实现更精确的放置。
