Abstract：
UNASSIGNED: The superficial radial artery (SRA) is a rare congenital anomaly in the forearm. However, it can be detected incidentally via trauma, intraoperative findings, angiography, or ultrasonography. In addition, intra-arterial infusion of intravenous medications and difficulties in radial artery catheterization may occur in cases of the SRA.
UNASSIGNED: Between December 2016 and July 2020, anomalous branches of radial arteries were found incidentally in nine patients at the preoperative visit and identified during ultrasound-guided radial artery puncture in 21 patients when radial artery catheterization using the palpation method proved difficult. Ultrasound examinations were performed for diagnosis and evaluation of these 30 patients.
UNASSIGNED: All anomalous branches of the radial artery were SRAs; 11 (37%), 13 (43%), 6 (20%) were present on the right side, on the left side, and bilaterally, respectively. All SRAs ran close to the cephalic vein. The vascular diameters of the radial arteries were the smallest in the radial artery distal to the SRA bifurcation (followed by in the SRA) and the largest in the radial artery proximal to the bifurcation (p < .001). In two cases, color Doppler study revealed that both the blood flow and color Doppler signal of the SRA disappeared with compression of the radial artery proximal to the SRA bifurcation.
UNASSIGNED: Because the SRA runs very close to the cephalic vein, a tourniquet applied to the arm may easily lead to intravenous catheter misplacement into the SRA. In addition, the small radial artery distal to the SRA bifurcation causes difficulty in radial artery catheterization. Furthermore, SRA cases may have falsely normal Allen\'s test results. Therefore, the authors recommend that the SRA must be identified before vascular puncture for safe vascular catheterization in the forearm.
UNASSIGNED: Between December 2016 and July 2020, anomalous branches of radial arteries were found incidentally in nine patients at the preoperative visit and identified during ultrasound-guided radial artery puncture in 21 patients when radial artery catheterization using the palpation method proved difficult. Ultrasound examinations were performed for diagnosis and evaluation of these 30 patients.
UNASSIGNED: All anomalous branches of the radial artery were SRAs; 11 (37%), 13 (43%), 6 (20%) were present on the right side, on the left side, and bilaterally, respectively. All SRAs ran close to the cephalic vein. The vascular diameters of the radial arteries were the smallest in the radial artery distal to the SRA bifurcation (followed by in the SRA) and the largest in the radial artery proximal to the bifurcation (p < .001). In two cases, color Doppler study revealed that both the blood flow and color Doppler signal of the SRA disappeared with compression of the radial artery proximal to the SRA bifurcation.
UNASSIGNED: Because the SRA runs very close to the cephalic vein, a tourniquet applied to the arm may easily lead to intravenous catheter misplacement into the SRA. In addition, the small radial artery distal to the SRA bifurcation causes difficulty in radial artery catheterization. Furthermore, SRA cases may have falsely normal Allen\'s test results. Therefore, the authors recommend that the SRA must be identified before vascular puncture for safe vascular catheterization in the forearm.
摘要：
■桡动脉浅动脉（SRA）是前臂罕见的先天性异常。然而,它可以通过创伤偶然发现，术中发现,血管造影,或超声检查。此外,在SRA的病例中,动脉内输注静脉药物和桡动脉导管插入困难可能会发生.
■在2016年12月至2020年7月之间，在术前访视的9例患者中偶然发现了桡动脉的异常分支，并在超声引导下的桡动脉穿刺中发现了21例患者，当使用触诊方法进行桡动脉导管插入被证明是困难的。对这30例患者进行超声检查以进行诊断和评估。
■桡动脉的所有异常分支均为SRA；11（37％），13（43%），6个（20％）出现在右侧，在左边,双边，分别。所有SRA都靠近头静脉。桡动脉的血管直径在SRA分叉远侧的桡动脉中最小(其次是SRA),在分叉近侧的桡动脉中最大(p<.001)。在两种情况下，彩色多普勒研究显示，随着SRA分叉处桡动脉的压缩，SRA的血流和彩色多普勒信号均消失。
■因为SRA非常靠近头静脉，施加在手臂上的止血带很容易导致静脉导管误置到SRA中。此外,SRA分叉远端的小桡动脉导致桡动脉导管插入困难。此外，SRA病例可能具有错误正常的Allen的测试结果。因此,作者建议,在前臂进行安全的血管导管插入术之前,必须在血管穿刺前确定SRA.
■在2016年12月至2020年7月之间，在术前访视的9例患者中偶然发现了桡动脉的异常分支，并在超声引导下的桡动脉穿刺中发现了21例患者，当使用触诊方法进行桡动脉导管插入被证明是困难的。对这30例患者进行超声检查以进行诊断和评估。
■桡动脉的所有异常分支均为SRA；11（37％），13（43%），6个（20％）出现在右侧，在左边,双边，分别。所有SRA都靠近头静脉。桡动脉的血管直径在SRA分叉远侧的桡动脉中最小(其次是SRA),在分叉近侧的桡动脉中最大(p<.001)。在两种情况下，彩色多普勒研究显示，随着SRA分叉处桡动脉的压缩，SRA的血流和彩色多普勒信号均消失。
■因为SRA非常靠近头静脉，施加在手臂上的止血带很容易导致静脉导管误置到SRA中。此外,SRA分叉远端的小桡动脉导致桡动脉导管插入困难。此外，SRA病例可能具有错误正常的Allen的测试结果。因此,作者建议,在前臂进行安全的血管导管插入术之前,必须在血管穿刺前确定SRA.
