Classification and use of lancets
1. Split type
The split lancet is a disposable lancet commonly used in clinical practice, basically replacing the syringe blood collection 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 hose of the intravenous infusion needle. When in use, the blood collection needle needs to be rotated and fixed at the front end of the needle holder's outer cylinder, and the vein puncture is performed by holding the venipuncture. Block the blood sleeve and pierce the rubber stopper of the vacuum tube, and suck the blood into the blood collection tube under the action of negative pressure. When necessary, repeat this process to achieve multi-tube blood collection; after blood collection, pull out the venipuncture needle to locally stop bleeding, remove the blood collection needle from the needle holder, and discard the venipuncture needle together with the venipuncture needle in the waste box.
Features: After the lancet is fired, the needle core will be locked, so that the lancet can only be used once, which can ensure the safety of the user; the push-type firing design provides the user with the easiest operation; high-quality, ultra-sharp The three-edged needle design can quickly pierce the skin and reduce the pain of the patient; a variety of needle types and piercing depths are suitable for most blood collection needs.
2. Pen lancet
Pen lancets are not used much in clinical practice. Its structure is a through needle tube with sharp edges at both ends. The middle and lower sections of the needle tube are fixed on the needle seat, the front end is called the venipuncture needle, and the rear end is called the blood collection needle. 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, rotate and fix the blood collection needle at the front end of the outer cylinder of the needle holder, and perform venipuncture. After success, insert the vacuum blood collection tube into the cavity at the back end of the needle holder, so that the back edge of the blood collection needle passes through the blood blocking sleeve and penetrates through it. Puncture the rubber stopper of the vacuum tube, and under the action of negative pressure, the blood is drawn into the blood collection tube. Repeating in this way, the collection of multiple tubes of blood samples can be realized.
3. Arterial blood collection needle
Arterial blood collection is of great significance for the diagnosis and treatment of hypoxemia. Arterial blood sampling is the basis for accurate determination of hypoxemia.
Features: The needle of the arterial blood gas syringe is strictly fixed to prevent the risk of needle loosening during the whole process of collecting arterial blood samples. The high molecular density of the blood collection syringe wall and the double-sealed needle plug effectively prevent the blood gas sample from exchanging gas with the outside world. Before blood collection, the blood collection volume can be preset according to the test requirements, so that the arterial puncture operation is safe and convenient, 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 discharge the residual gas inside the syringe under the action of arterial pressure, avoiding the interference of dead space gas on the results of arterial blood gas detection.
