Venous blood sampling needle is a blood sampling needle used to collect blood samples during medical examination. The blood sampling needle at the top is used to puncture the blood vessel, and the transparent tube at the tail end is connected to the tail needle. The tail needle is wrapped by a rubber hose and covered with a needle cap. It is used to pierce into the vacuum blood sampling test tube, and the negative pressure in the test tube is used to inhale blood. Inside the tube.





Structure of venous blood collection needle
The venous blood collection needle is mainly a disposable vacuum venous blood collection device, which is used to collect blood samples in the medical examination process. The venous blood collection needle is composed of a needle holder, a connector, a puncture needle, and a rubber part, as shown in Figure 1. The vacuum blood collection device includes three parts: vacuum blood collection tube, blood collection needle (straight needle and scalp blood collection needle), and needle holder.
The vacuum blood collection tube is its main component and is mainly used for the collection and preservation of blood samples. The vacuum blood collection tube is preset with a certain amount of negative pressure during the production process. When the blood collection needle punctures into the blood vessel, the blood automatically flows into the blood collection tube due to the negative pressure in the blood collection tube; at the same time, various additives are preset in the blood collection tube. It can meet the clinical multiple comprehensive blood tests.