Abstract: Objective　To investigate the influence and safety of ultrasound-guided dynamic tip positioning technology on the quality of radial artery catheterization in children. Methods　A total of 109 children who planned to undergo radial artery catheterization in The First Affiliated Hospital of Henan University of Science and Technology from February 2019 to February 2021 were selected as the study subjects. According to the random number table method, they were divided into two groups, including 54 patients [30 males and 24 females, aged (2.51±0.48) years] in the control group who received radial artery catheterization by touch positioning method, 55 patients [32 males and 23 females, aged (2.53±0.44) years] in the observation group who were given ultrasound-guided dynamic needle tip positioning technique for puncture catheterization. The related indexes of the two groups were compared. χ² test was used for the count data and independent sample t test was used for the measurement data. Results　The first puncture success rate [85.45% (47/55)] and total success rate [96.36% (53/55)] in the observation group were higher than those in the control group [48.15% (26/54) and 64.81% (35/54)] (both P<0.05). The puncture time [(4.12±0.99) min] and puncture times [(1.02±0.31) times] in the observation group were lower than those in the control group [(8.23±1.26) min and (2.18±0.46) times] (both P<0.05). The total incidence of radial artery hematoma and spasm after puncture in the observation group [3.64% (2/55)] was lower than that in the control group [16.67% (9/54)] (P<0.05). Conclusion　Both touch positioning and ultrasound-guided dynamic needle tip positioning can be used in radial artery catheterization in children, but the latter has a higher puncture success rate, better quality control indexes, and higher safety.

Key words: Ultrasonic guidance, Dynamic tip positioning technology, Radial artery catheterization, Catheterization quality

摘要： 目的　探讨实施小儿桡动脉穿刺置管术时应用超声引导下动态针尖定位技术对患儿穿刺置管质量的影响及安全性。方法　选取河南科技大学第一附属医院2019年2月至2021年2月期间109例拟行小儿桡动脉穿刺置管术患儿为研究对象，根据随机数字表法分为2组，其中对照组54例［男30例，女24例，年龄（2.51±0.48）岁］给予触摸定位法行桡动脉穿刺置管术；观察组患者55例［男32例，女23例，年龄（2.53±0.44）岁］给予超声引导下动态针尖定位技术进行穿刺置管。对比两组患儿相关指标。计数资料采用χ²检验，计量资料采用独立样本t检验。结果　观察组患者首次穿刺成功率［85.45%（47/55）］、总成功率［96.36%（53/55）］高于对照组首次穿刺成功率［48.15%（26/54）］、总成功率［64.81%（35/54）］（均P<0.05）；观察组患者穿刺耗时（4.12±0.99）min、穿刺次数（1.02±0.31）次小于对照组穿刺耗时（8.23±1.26）min、穿刺次数（2.18±0.46）次（均P<0.05）；观察组患者穿刺后桡动脉血肿、痉挛的总发生率［3.64%（2/55）］小于对照组［16.67%（9/54）］（P<0.05）。结论　触摸定位法与超声引导下动态针尖定位技术均可应用于小儿桡动脉穿刺置管术，但后者的穿刺成功率更高，置管操作质控指标更好，安全性更高。

关键词: 超声引导, 动态针尖定位技术, 桡动脉穿刺置管术, 穿刺置管质量