Classification and use of blood needle
1. The separation
Split-type blood collection needle is a widely used disposable blood collection needle in clinical practice, which basically replaces the syringe blood collection method used in the last century. It is often used together with disposable blood collection vessel.
Its structure is connected with a blood collecting needle on the needle base at the end of the hose of the intravenous infusion needle. When used, the blood collecting needle needs to be rotated and fixed at the front end of the needle holder's outer cylinder, and the hand-held venipecture is used to puncture the vein. After successful operation, the vacuum blood collecting vessel is inserted into the cavity at the back end of the needle holder, and the cutting edge of the blood collecting needle is inserted through the blood blocking sleeve and into the vacuum tube rubber plug. Under the action of negative pressure, the blood is sucked into the blood collecting vessel. When necessary, repeated so, can achieve multi-tube blood collection; After blood collection, pull out the venous puncture needle, stop bleeding locally, remove the blood needle from the needle holder, and discard the needle together with the venous puncture needle in the waste box.
Features: After the blood needle is launched, the needle core will be locked, so that the blood needle can only be used once, which can ensure the safety of users; The design of press launch provides the user with the easiest operation; High quality, ultra-sharp three-edge needle design, can quickly Pierce the skin, reducing the patient's pain; Various needle sizes and penetration depths are suitable for most blood volume collection needs.
2. Pen-based blood collection needle
Pen-based blood needle is not widely used in clinic. The lower part of the needle tube is fixed on the needle base. The front end is called venous puncture needle and the back end is called blood collecting needle. The surface of the blood collecting needle has blood blocking sleeve and the two ends of the needle tube have protective cannula. In clinical practice, blood collection is usually used together with needle holder and one-time blood collection.
When used, the blood collection needle was rotated and fixed at the front end of the needle holder, and venipenpuncture was performed. After success, the vacuum blood collection vessel was inserted into the rear cavity of the needle holder, so that the rear edge of the blood collection needle passed through the blood resistance sleeve and pierced through the vacuum tube rubber plug, and the blood was drawn into the blood collection tube under the action of negative pressure. So repeated, can realize multi - tube blood specimen collection.
3. Arterial blood sampling needle
Arterial blood sampling is of great significance for the diagnosis and treatment of hypoxemia. Arterial blood sampling is the basis for accurately judging hypoxemia.
Features: The arterial blood gas syringe is strictly fixed with the needle to prevent the risk caused by needle loose during the whole process of collecting arterial blood samples. The molecular density of the wall height of the blood gas syringe and the double closed needle plug effectively prevent gas exchange between blood gas samples and the outside world. The blood collection volume can be preset according to the test needs before blood collection, so that the operation of arterial puncture is safe and simple, and the waste of blood sample can be avoided. A unique automatic exhaust device is designed at the rear end of the syringe, which can quickly and safely discharge the residual gas inside the syringe automatically under the action of arterial pressure, so as to avoid the interference of dead space gas on the results of arterial blood gas detection.
