Intravenous Infusion Needle

Intravenous infusion is a method that uses the principle of atmospheric pressure and hydrostatic pressure to input a large number of sterile liquids, electrolytes and drugs into the body through the vein. Intravenous infusion needle is used to connect syringe, infusion set and blood transfusion set for intravenous infusion of liquid medicine and blood transfusion.

Needle selection

1. Relatively speaking, the smaller the needle number, the weaker the pain during puncture and the less damage to the skin and blood vessels. However, blind use of small needles can prolong the infusion time, sometimes fail to achieve the therapeutic effect, and may even have a reaction.

2. For the elderly, infant care and patients with cardiopulmonary dysfunction, select the 5.5 type needle, which is easy to control the number of infusion drops and reduce the patient's pain.

3. Critical condition: Patients with shock and severe dehydration choose 9-12 needles, which need a large amount of liquid input to save the patient's life. Mild condition: good cardiopulmonary function, etc. select 7 types of needles, and the infusion speed can be slightly faster.

4. Input of special drugs: the input speed of hypertonic saline, pressor drugs, antihypertensive drugs, etc. should be slow, and 5.5 needle should be selected to control the infusion speed and reduce the adverse reactions of patients. General drug input: antibiotic and energy input, 7-type needle should be selected. Special solution for saving patients' lives: colloidal solution: whole blood, plasma substitute, concentrated albumin and other viscous liquids. 9-12 needles should be selected without controlling the infusion speed.

5. The infusion time is long, the number of solution drops needs to be controlled for special drugs, and the patients who do not want to use intravenous indwelling needle, such as premature rupture of membranes, placenta previa and pregnant women with pregnancy induced hypertension, use special drugs (magnesium sulfate): antispasmodic, antihypertensive, diuretic and other drugs. 5.5 needle should be selected, which can protect blood vessels if the damage is small.

6. Special population: it is difficult to find veins and blood vessels such as obesity and thin body shape, and the blood vessels are very thin. Therefore, it is advisable to choose model 5.5-7 needle.

Principle of selecting needle location

1. The elderly and children should avoid active or protruding veins.

2. Avoid areas with infection, exudation or thrombosis on the skin surface.

3. Avoid using the port of hemodialysis or the port of fistula.

4. For long-term infusion, pay attention to replacing the infusion part in a planned way to protect the vein.

5. The puncture site shall be selected from the distal end and gradually used to the proximal end.

Development of intravenous infusion needle: intravenous infusion technology formed a complete system in the 20th century and has become one of the most commonly used, direct and effective clinical treatment methods.

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