School of Nursing, University of Campinas, São Paulo, Brazil.
Department of Obstetrics and Gynecology, School of Medical Sciences, University of Campinas, São Paulo, Brazil.
JPEN J Parenter Enteral Nutr. 2020 Jul;44(5):912-919. doi: 10.1002/jpen.1786. Epub 2020 Feb 6.
The selection of a method for measuring the insertion length of nasogastric tubes in newborns is an important factor in establishing the safe use of this device.
The objective was to verify whether there is a difference in the proportion of correctly placed nasogastric tubes when using the nose, earlobe, mid-umbilicus (NEMU) method and the weight-based equation for measuring the insertion length.
This study is a randomized, controlled, blinded study comparing 2 methods of nasogastric insertion at a neonatal unit, with intensive and intermediate care, on 162 randomized individuals. Radiological assessment and pH test were conducted to verify tube placement. Data were collected on sex, birth weight, gestational age, and days of life. A log-binomial model was used to verify whether there were placement differences between investigated methods.
Of the patients, 56.1% were male, who had a mean birth weight of 1886.8 g and gestational age of 32.9 weeks and were 10.8 days old. Radiological images demonstrated that tubes were properly placed in the gastric body in 67.5% of patients using the NEMU method and in 91.5% using the weight-based equation: the weight-based equation was superior to the NEMU method, with a prevalence ratio of 1.36 (95% CI, 1.15-1.44). There was no difference between the 2 methods, according to pH test (P-value: .7179).
Based on radiographic confirmation, the weight-based equation for measuring the insertion length of the nasogastric tube in newborns resulted in significantly more nasogastric tubes being placed in the correct intragastric location.
选择一种测量新生儿鼻胃管插入长度的方法是确保该设备安全使用的一个重要因素。
验证使用鼻尖-耳垂-脐中线（NEMU）法和基于体重的公式测量插入长度的方法，哪种方法能更准确地放置鼻胃管。
这是一项在新生儿重症监护病房和中级护理病房进行的随机、对照、盲法研究，共纳入 162 名随机个体，比较了两种鼻胃管插入方法。通过放射学评估和 pH 值测试来验证管腔位置。收集了性别、出生体重、胎龄和出生后天数等数据。使用对数二项式模型来验证所研究方法之间是否存在放置差异。
在纳入的患者中，56.1%为男性，平均出生体重为 1886.8 g，胎龄为 32.9 周，日龄为 10.8 天。放射影像学图像显示，使用 NEMU 法时，有 67.5%的患者胃管被正确放置在胃体，而使用基于体重的公式时，这一比例为 91.5%：基于体重的公式优于 NEMU 法，优势比为 1.36（95%可信区间为 1.15-1.44）。pH 值测试（P 值：.7179）显示两种方法之间无差异。
基于放射学确认，新生儿鼻胃管插入长度的基于体重的公式可显著增加胃内正确放置的胃管数量。
