Structure of venous blood collection needle

Phlebotomists are primarily disposable vacuum phlebotomists used to collect blood samples during medical testing. The venous blood collection needle consists of a needle holder, connector, puncture needle, rubber part, etc., as shown in Figure 1. Vacuum blood collection device includes three parts: vacuum blood collection tube, blood collection needle (straight needle and scalp type blood collection needle), and needle holder.

      Vacuum blood collection tube is its main component, which is mainly used for the collection and preservation of blood samples. A certain amount of negative pressure is preset in the vacuum blood collection tube during the production process. When the blood collection needle enters the blood vessel, due to the negative pressure in the blood collection tube, the blood automatically flows into the blood collection tube; at the same time, various additives are preset in the blood collection tube, completely Able to meet multiple clinical comprehensive blood tests.