Shukla H, Ferrara A
Am J Dis Child. 1986 Aug;140(8):786-8. doi: 10.1001/archpedi.1986.02140220068034.
To determine the neonatal body measurement that best predicts insertional umbilical catheter lengths, we studied two commonly used parameters--shoulder-to-umbilicus length and total body length--and two new parameters--suprasternal notch-pubic symphysis length and birth weight (BW)--on 43 umbilical artery (UA) and ten umbilical vein (UV) catheterizations. The new parameters showed better correlations than the currently used ones. The BW variable, with the highest coefficient of correlation among all four parameters, was applied prospectively in 25 UA and 16 UV catheter insertions. All catheter tips thus placed were found to be in acceptable positions. Although any one of the four parameters can be used clinically, we prefer the BW parameter for its reliability, reproducibility, and ability to be estimated in emergency settings. The modified regression (estimating) equations utilizing BW are as follows: UA catheter length = 3 X BW + 9; UV catheter length = 1/2 X UA line calculation + 1, in which lengths are measured in centimeters and BW is measured in kilograms.
为确定最能预测脐静脉导管插入长度的新生儿身体测量指标，我们对43例脐动脉（UA）导管插入术和10例脐静脉（UV）导管插入术研究了两个常用参数——肩至脐长度和全身长度，以及两个新参数——胸骨上切迹至耻骨联合长度和出生体重（BW）。新参数显示出比目前使用的参数更好的相关性。在所有四个参数中相关性系数最高的BW变量，被前瞻性地应用于25例UA和16例UV导管插入术中。发现所有这样放置的导管尖端位置均合适。虽然这四个参数中的任何一个都可在临床上使用，但出于其可靠性、可重复性以及在紧急情况下能够进行估算的能力，我们更倾向于BW参数。利用BW的修正回归（估算）方程如下：UA导管长度 = 3×BW + 9；UV导管长度 = 1/2×UA导管长度计算值 + 1，其中长度以厘米为单位，BW以千克为单位。
