Intravenous catheter needles are also called venous trocars. The core components include a flexible catheter/cannula that can be placed in the blood vessel, and a stainless steel puncture guide core. When in use, the catheter and the needle core are punctured into the blood vessel. When the catheter is completely into the blood vessel, the needle core is withdrawn, and only the soft catheter is placed in the blood vessel for infusion treatment.
catheter needles are divided into open and closed type, open type is divided into normal type and safety type (anti-needle type), and closed type is divided into normal type and safety type (anti-needle stab wound)
