经过多年临床研究 ,我们发明一种多功能套管穿刺针 ,具有组织切割、针吸、协助置管进行近距离放疗、抽液及注药功能。现介绍如下。1　结构　该针由实性针芯和外套管两大部分组成。针长不一。针芯直径 0 .2 cm,前端有尖 ,尖下 0 .5 cm设有长 0 .5 cm的凹槽 ,占针芯周长的五分之 After years of clinical research, we have invented a multi-functional cannula puncture needle with tissue cutting, needle suction, assisted catheterization for brachytherapy, fluid extraction, and drug administration. The introduction is as follows. 1 Structure The needle consists of two parts: a solid core and an outer sleeve. The needles are of different lengths. The needle diameter is 0 .2 cm, the tip has a tip, and the tip 0.5 cm has a groove of 0.5 cm in length, which occupies five times the circumference of the needle core.