Accident and Emergency Medicine Academic Unit, Chinese University of Hong Kong, Shatin, New Territories, Hong Kong.
Resuscitation. 2010 Sep;81(9):1105-10. doi: 10.1016/j.resuscitation.2010.05.015.
Accurate measurement of children's weight is rarely possible in paediatric resuscitation, and rapid estimates are made to ensure appropriate drug and fluid doses and equipment selection. Weight is commonly estimated from formulae based on children's age, or from their height using the Broselow tape. Foot-length and mid-arm circumference have also been suggested as the basis of weight-estimation formulae.
To determine which of age, height, foot-length or mid-arm circumference had the strongest relationship with weight in healthy children, to derive a simple weight-estimation formula from the strongest correlate, and to compare its performance with existing weight-estimation tools.
This was a population-based prospective observational study of Hong Kong Chinese children aged 1-11 years old last birthday. Weight was measured to the nearest 0.2 kg; height, foot-length and mid-arm circumference to the nearest 0.1 cm. Multiple regression analysis was used to determine the strongest independent relationships with weight, and linear regression analysis derived a weight-estimation formula. Accuracy and precision of this formula were compared with standard age-based and height-based weight-estimation methods.
Mid-arm circumference had the strongest relationship with weight, and this relationship grew stronger with age. The formula, weight [kg]=(mid-arm circumference [cm]-10) x 3, was at least as accurate and precise as the Broselow method and outperformed the age-based rule in school-age children, but was inadequate in pre-school children.
This weight-estimation formula based on mid-arm circumference is reliable for use in school-age children, and an arm-tape could be considered as an alternative to the Broselow tape in this population.
在儿科复苏中，准确测量儿童体重的情况很少见，通常是快速估算，以确保药物和液体剂量以及设备选择的适当性。体重通常是根据儿童年龄的公式估算的，或者根据他们的身高使用 Broselow 色码带进行估算。也有人提出用脚长和中臂周长作为体重估算公式的基础。
确定在健康儿童中，年龄、身高、脚长或中臂周长与体重的关系最强，从最强相关因素中得出一个简单的体重估算公式，并将其与现有的体重估算工具进行比较。
这是一项基于人群的香港华裔儿童 1-11 岁生日前的前瞻性观察性研究。体重测量精确到 0.2 公斤；身高、脚长和中臂周长精确到 0.1 厘米。多元回归分析用于确定与体重的最强独立关系，并通过线性回归分析得出体重估算公式。将该公式的准确性和精密度与标准的年龄和身高体重估算方法进行比较。
中臂周长与体重的关系最强，且随着年龄的增长而增强。公式为体重[kg]=（中臂周长[cm]-10）x 3，至少与 Broselow 方法一样准确和精确，并且在学龄儿童中优于基于年龄的规则，但在学龄前儿童中不适用。
基于中臂周长的这种体重估算公式在学龄儿童中是可靠的，在该人群中，臂带可以被考虑作为 Broselow 色码带的替代品。
