Precision-filtering injection needle

Abstract

The invention discloses a precision-filtering injection needle which comprises a needle tube seat, a base, a circular precision-filtering diaphragm, a needle tube and a needle tube protective jacket, wherein the inward end of the needle tube seat and the inward end of the base are tightly fixed together, the needle tube is bonded and fixed with the outward end of the needle tube seat by a resin adhesive, and the injection needle is characterized in that 1-6 large support pillars are distributed in the middle of the inward end of the base, all the large support pillars are same in height, 1-12 large support pillar through-holes interconnected with an inner hole of an inner cone joint are distributed at the bottoms or peripheries of the large support pillars; and a circular gasket is placed at the bottom of the inward end of the needle tube seat, and the circular precision-filtering diaphragm is bonded and fixed on the circular gasket. The precision-filtering injection needle can be used with a conventional injection utensil or infusion utensil. When the precision-filtering injection needle carries out pushing injection after aspirating a liquid medicine, the liquid medicine is filtered completely by the circular precision-filtering diaphragm, so that particulates, foreign matters or impurities are prevented from being injected into the human body, thereby reducing the risk of thrombus.

Description

technical field [0001] The invention relates to a sterile medical appliance for clinical intravenous and intramuscular injection or infusion dispensing, in particular to an injection needle with a precision filter device. Background technique [0002] Disposable sterile injection needles have been used in the medical field for many years. The supporting syringes are used for clinical muscle, vein, subcutaneous, intradermal injection or infusion. The use of utensils prevents cross-infection of patients. [0003] According to domestic and foreign literature reports, it is found that in the process of opening a glass ampoule, a large amount of invisible glass fragments will fall into the liquid medicine in the ampoule bottle, or, in the configuration process of the infusion liquid medicine, use During the process of the needle puncturing the rubber stopper of the vial or the large infusion container, rubber particles will be produced, and at the same time, foreign substances s...

AI Technical Summary

Problems solved by technology

When the syringe extracts the liquid medicine, all the particles, debris, and impurities present in the liquid medicine are drawn into the barrel of the injection molding device, while the ordinary injection needles used in China do not have a filter device, and the medicine is injected into the injection needle. During the process of injecting the liquid into the muscles or veins of the human body, all the particles, debris, and impurities in the liquid medicine are also injected into the human tissue. These foreign objects will cause serious damage to the patient, and even threaten the life of the patient in severe cases.

[0004] With the development of society, people have also realized the harmfulness of foreign matter in the liquid medicine to the human body. Medical device manufacturers have also invented the liquid medicine filter that matches the syringe. The filter device is used to filter the liquid medicine. The specific operation method is: first use the ordinary injection needle to suck the liquid medicine, then remove the injection needle, install the special filter on the syringe joint, and finally install the injection needle on the medicine Finally, injecting the medicinal liquid into the human body also plays a role in filtering the medicinal liquid, but this operation process is cumbersome and inconvenient, and the non-sterile operation at the same time of changing the device has caused the loss of the drug. Pollution, and increase the use of liquid medicine filter products, resulting in the cost of medical treatment for patients, because of the above drawbacks, this method of filtering liquid medicine has not been widely used clinically

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