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Blood sampling needle is an instrument used to collect blood samples in the process of medical examination. It consists of a needle and a needle rod. The needle is located at the head of the needle rod, and a sheath is connected by sliding on the needle rod.
1. The first generation: willow needle
It is made of a single piece of metal sheet. The needle is 3 ~ 4cm long and looks like a willow leaf. There is a fixed tip on the head, about 2 ~ 3mm in length. The packaging is easy and easy to be contaminated.
2. The second generation: plastic die molding needle
It uses plastic press molding, needle tip is made of stainless steel and other metals, each needle is equipped with plastic needle cap, packaging is more independent. Take off the needle cap before use to prevent pollution, the needle is small, proper operation will make the patient's pain is reduced, but also can reduce the psychological pressure of the patient; Low price, can be used once.
Common shortcomings of the first and second generations: strong pain, wound size mainly depends on the experience and professional quality of clinical laboratory staff, patient wound is too close to the fingers or gloves of staff, there is still the possibility of cross-contamination of blood between patients.
3. The third generation: mechanical blood needle
Using MECHANICAL device, needle using ejection device, almost completely accurate, fast, moderate depth, straight path piercing the skin, greatly reducing the pain of patients. Basically solved the first two generations of blood collection needle pain, large wounds and other problems.
4. The fourth generation: laser blood needle
Using the powerful energy of the laser, the tissue is burned in an instant, penetrating the skin to form bleeding spots. The device creates very small wounds, the depth of which can be adjusted according to the patient's skin condition (by adjusting the intensity of the laser). In addition, this blood collection instrument has no actual physical contact with the patient, even if there is a tiny blood point ejection, can also be replaced by the method of laser emission head to completely eliminate blood cross contamination, is a relatively safe blood collection instrument.
The laser blood needle has different shapes, big and small, big like a microscope, small like a cigarette box, can be used for outpatient blood collection and bedside blood collection. But during the blood collection process, the laser needle will make a popping sound and emit a faint smell of burnt flesh, which makes some patients uneasy
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