A unit comprising a puncture needle and a needle guard tube and use thereof

摘要

The assembly consists of a hollow needle with one end having a chamfered tip (3) and the other connected to a base (2), and a protective tube (P) with a lengthwise slit (4) at one end. The assembly consists of a hollow needle with one end having a chamfered tip (3) and the other connected to a base (2), and a protective tube (P) with a lengthwise slit (4) at one end. The needle has an angled rear section (1c) that passes through the slit and is located outside the protective tube, where it is fitted to the base and able to slide lengthwise between projecting and retracted positions. The protective tube is deformable for ease of manipulation during use; its forward end has a rigid connecting piece for the base of the catheter and a cannula (7) for the needle to pass through.