Today we will talk about the classification and usage of blood collection needle mould.
1. Split type
The split lancet is a disposable lancet that is commonly used clinically. It basically replaces the syringe blood sampling method used in the last century, and is often used in conjunction with a disposable blood collection tube.
The structure is that a blood collection needle is connected to the needle seat at the end of the tube of the intravenous infusion needle. When in use, the blood collection needle needs to be rotated and fixed to the front end of the needle holder outer cylinder, and the vein puncture is carried out with the hand held to puncture the vein. After successful, the vacuum blood collection tube is inserted into the rear cavity of the needle holder, so that the blood collection needle blade passes through The blood stopper is pierced into the rubber plug of the vacuum tube, and the blood is sucked into the blood collection tube under the action of negative pressure. If necessary, repeat this procedure to achieve multi-tube blood collection; after blood collection is completed, the venipuncture needle is pulled out to stop bleeding locally, the blood collection needle is removed from the needle holder, and the venipuncture needle is discarded in the waste box.
Features: After the lancet is launched, the needle core will be locked, so that the lancet can only be used once, which can ensure the safety of the user; the design of the push-type launcher provides the user with the easiest operation; high-quality, ultra-sharp The three-sided needle design can quickly pierce the skin and reduce the pain of the patient; the needle models and piercing depths of various specifications are suitable for most blood collection needs.
2. Pen-type blood sampling needle
Pen-type blood sampling needles are not used much in clinical practice. The structure is a penetrating needle tube with sharp cutting edges at both ends. The middle and lower section of the needle tube is fixed on the needle seat. The front end is called a venipuncture needle, and the back end is called a blood collection needle. The blood collection needle has a blood blocking sleeve and a needle tube on the surface. There is a protective sleeve at the end. In clinical practice, blood collection is usually used in conjunction with needle holders and disposable blood collection tubes.
When in use, the blood collection needle is rotated and fixed to the front end of the outer cylinder of the needle holder to perform venipuncture. After successful, insert the vacuum blood collection tube into the cavity at the rear end of the needle holder, so that the rear edge of the blood collection needle passes through the blood stop sleeve and penetrates The rubber plug of the vacuum tube is pierced, and the blood is drawn into the blood collection tube under the action of negative pressure. Such repetition can realize the collection of multiple blood samples.
3. Arterial blood sampling needle
Arterial blood sampling is of great significance for judging and treating hypoxemia. Arterial blood sampling is the basis for accurately judging hypoxemia.
Features: The arterial blood gas syringe strictly fixes the needle to prevent the risk of loosening the needle during the whole process of collecting arterial blood samples. The high molecular density of the blood sampling syringe wall and the double-sealed needle plug effectively prevent the blood gas sample from gas exchange with the outside world. Before blood sampling, the amount of blood collected can be preset according to the needs of the test, so that the arterial puncture operation is safe and simple, and the waste of blood samples is avoided. The hole stone at the back of the syringe is designed to form a unique automatic exhaust device, which can quickly and safely exhaust the residual gas in the syringe under the action of arterial pressure, and avoid the interference of dead space gas on the arterial blood gas detection results.