Accuracy of nine estimation methods for umbilical venous catheterization insertion depth in neonates
10.3760/cma.j.cn113903-20250430-00230
- VernacularTitle:九种新生儿脐静脉置管深度估算方法的准确性分析
- Author:
Guanchu CHEN
1
;
Shuyan LI
;
Yuan HUO
;
Weiyang LI
;
Yajuan YU
;
Fangping ZHAO
;
Jianming TANG
;
Hongxia GAO
Author Information
1. 甘肃省妇幼保健院（甘肃省中心医院）新生儿科，兰州 730050
- Publication Type:Journal Article
- Keywords:
Umbilical venous catheterization;
Estimation formula;
Accuracy;
Neonate
- From:
Chinese Journal of Perinatal Medicine
2025;28(10):883-888
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To analyze the accuracy of nine estimation methods for umbilical venous catheterization (UVC) insertion depth in neonates.Methods:This prospective study enrolled neonates who underwent successful UVC placement in the Department of Neonatology at Gansu Provincial Women and Child Healthcare Hospital between September 2023 and October 2024. The standard catheter tip position was defined as the junction of the inferior vena cava and right atrium, with a deviation of ≤0.5 cm considered accurate. Patients were stratified by birth weight (BW) into three groups: <1 500 g, 1 500- 2 499 g, and ≥2 500 g. The actual UVC depth was compared with depths estimated using nine methods: Shukla formula, modified Shukla formula, JSS formula, BW formula, Tambasco formula, modified Tambasco formula, Dunn's nomogram, body surface measurement, and ultrasonographic measurement. Accuracy was evaluated using nonparametric tests and Bland-Altman agreement analysis.Results:The study included 111 neonates: 41 (36.9%) in the <1 500 g group, 55 (49.6%) in the 1 500-2 499 g group, and 15 (13.5%) in the ≥2 500 g group. In the <1 500 g group, accuracy rates ranged from 24% to 56%, with body surface measurement showing the highest accuracy (56%); the mean difference from actual depth was－0.073 cm, with 95% limits of agreement (LOA) of－1.764 to 1.618 cm. In the 1 500-2 499 g group, accuracy rate ranged from 15% to 51%, with the modified Tambasco formula being most accurate (51%); the mean difference was 0.113 cm (95%LOA:－1.558-1.783 cm). In the ≥2 500 g group, accuracy rate ranged from 0/15 to 10/15, with Dunn's nomogram being most accurate (10/15); the mean difference was－0.120 cm (95%LOA:－1.380-1.140 cm).Conclusions:The accuracy of the nine UVC depth estimation methods varied across different BW groups and among methods within the same group. Selection of an estimation method should be tailored to the neonate's birth weight.
