名词
中文翻译：单球心导管
同义词：
['single-ball catheter', 'single-ball needle']
例句：
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1. The surgeonused a single-ball mandrel to guide the needle through the skin.
外科医生使用单球心导管引导针穿过皮肤。
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2. During the procedure, the nurse carefully inserted the single-ball mandrel into the patient's arm.
在手术过程中，护士小心地将单球心导管插入患者的手臂。
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3.The anesthesiologist used the single-ball mandrel to inject the patient with local anesthetic before surgery.
麻醉师使用单球心导管在手术前给患者注射局部麻醉药。