Classification of blood collection needles and methods of use
The split blood collection needle is a commonly used disposable blood collection needle, which basically replaces the blood collection method of the syringe used in the last century, and is often used in combination with the disposable blood collection tube.
The structure is connected to a blood collection needle at the end of the hose end of the intravenous infusion needle. When using, the blood collection needle needs to be rotated and fixed at the front end of the needle holder outer tube, and the hand vein puncturing is performed for the vein. After successful, the vacuum blood collection tube is inserted into the rear end cavity of the needle holder, so that the blood collection needle edge passes through. The blood-slip sleeve is inserted into the vacuum tube rubber plug, and the blood is sucked into the blood collection tube under the action of negative pressure. When necessary, such repeated, multi-tube blood collection can be achieved; blood collection is completed, the venous puncture needle is pulled out, local hemostasis is removed, the blood collection needle is removed from the needle holder, and the venous puncture needle is discarded in the waste box.
Features: After the blood collection needle is fired, the needle core will be locked, so that the blood collection needle can only be used once, which can ensure the safety of the user; the push-type emission design provides the user with the easiest operation; high quality and super sharp The triangular needle design can quickly pierce the skin and reduce the pain of the patient; the needle type and piercing depth of various specifications are suitable for most blood collection needs.
2. Pen type lancet
Pen-type lancets are not used much in clinical practice. The structure is a penetrating needle, and both ends have a sharp cutting edge. The lower part of the needle tube is fixed on the needle seat, the front end is called a venipuncture needle, the back end is called a blood collecting needle, and the blood collecting needle surface has a blood blocking sleeve and a needle tube. There is a protective sleeve at the end. Clinically, 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 at the front end of the outer tube of the needle holder, and the venipuncture is performed. After successful, the vacuum blood collection tube is inserted into the cavity of the rear end of the needle holder, so that the back end of the blood collection needle passes through the blood blocking sleeve and runs through. Puncture the vacuum tube rubber plug, and draw the blood into the blood collection tube under the action of negative pressure. Repeatedly, multiple blood collections can be collected.
3. Arterial blood collection needle
Arterial blood collection is of great significance for the judgment and treatment of hypoxemia. Arterial blood sampling is the basis for accurate diagnosis of hypoxemia.
Features: The arterial blood gas syringe strictly fixes the needle to prevent the risk caused by the needle loosening during the whole process of collecting the arterial blood sample. The molecular density of the blood collection needle wall height and the double closed needle plug effectively prevent gas exchange between the blood gas sample and the outside. Before the blood collection, the blood collection amount can be preset according to the test, so that the arterial puncture operation is safe and simple, and the blood sample is avoided. The rear end of the syringe is designed to form a unique automatic exhaust device, which can automatically and automatically discharge the residual gas inside the syringe under the pressure of arterial pressure, avoiding the interference of the dead space gas on the arterial blood gas detection result.
Steps for usage:
1) Remove the arterial blood collection needle from the sterile packaging.
2) Remove the arterial blood collection needle cap and place it in a proper position.
3) Move the needle cap outward.
4) Push the mandrel forward to the zero mark line and pull back the preset to the desired scale.
5) The arterial blood collection needle is downward, and the puncture is performed at an angle of 45° to 90°.
6) Fill the sample with a preset scale under arterial pressure.
7) After the sample is collected, immediately pull out the needle of the arterial blood collection needle and press the puncture point with gauze for at least 5 minutes to prevent bleeding.
Precautions for use:
1) Do not use if the protective cap is loose or loose.
2) For personal safety, do not reuse the lancet.
3) Do not share the same lancet with others to prevent cross-infection.
4) Fixation of the blood collection needle: The small thumb presses the tube or the tape sticks to one third of the tube. If the condition permits, the needle tip of the blood collection needle enters the blood vessel as much as possible.
5) The problem of the elastic tube: In order to prevent the elastic tube, the blood collection tube is taken in one hand, and the tail end of the blood collection needle is held in one hand.
6) Bleeding problem: gently press the puncture point after the cotton swab or needle to prevent the occurrence of blood clots.
7) Occasionally, the blood flow rate is very slow during use. It may be that the vacuum blood collection tube has insufficient negative pressure, the patient's blood is thick, the blood pressure is low, and the blood vessel wall blocks the needle of the blood collection needle.