coaxial needle electrode

例句：

1. 1.The coaxial needle electrode was used to detect the presence of a foreign object in the patient's body.
   使用同轴针电极来检测患者体内是否存在异物。
2. 2.The coaxial needle electrode was inserted into the patient's vein for blood sampling.
   将同轴针电极插入患者的静脉进行采血。
3. 3.The coaxial needle electrode was used to map out the electrical field distribution in the brain.
   使用同轴针电极来绘制大脑电场分布图。