Self-locking medical puncture needle and using method

Abstract

The invention relates to a self-locking medical puncture needle and a using method; the self-locking medical puncture needle comprises a steel puncture needle, a puncture needle holder composed of a puncture needle base and a puncture needle wing, a soft tube and a safety device composed of a bottom support and an upper cover. The safety device is sleeved outside the needle base of the puncture needle; after a medical operator completes clinical treatment or a blood collection operation, the safety device is pressed by one hand of the medical operator and the puncture needle wing is made to slide between cracks in two sides as a rectangular pulling handle is pulled backwards by the other hand, the rectangular pulling handle is driven into a limiting hole and is clamped by the closing ends of two baffle plates of a non-return piece and the steel puncture needle completely enters the safety device, so that the puncture needle can be safely taken down and be discarded. The self-locking medical puncture needle disclosed by the invention has the effects that the clinical puncture risk of the puncture needle is reduced, use safety is increased, the risk of medical waste disposal is reduced and effect is significantly improved. The self-locking medical puncture needle is concise in design and high in flexibility, and the puncture needle is applicable to intravenous infusion needles, medical blood taking needles and arteriovenous puncture needles of various types and the puncture needle is quite strong in practicability.

Description

Technical field [0001] The invention relates to a self-locking medical puncture needle and a use method, which is suitable for intravenous infusion needles, medical blood sampling needles and arteriovenous puncture needles. Background technique [0002] Intravenous infusion needles, medical blood sampling needles, and arteriovenous puncture needles that are used with infusion sets are the most common puncture devices in clinical practice. However, due to their puncture characteristics, these two devices are dangerous during use. The accident rate of sharp stab wounds caused by medical staff in many cases is relatively high when they are unskilled. This kind of medical injury has received extensive attention. In addition, the recycling and processing of this type of waste medical waste will also bring great risks to the operator, and sharp tool stabbing accidents frequently occur. [0003] Patent number ZL201310314017X is a utility model patent for a vein needle sheath, which state...

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of this patent are: after the venous needle is used, during the disposal or transportation process of the venous needle sheath, due to the two-piece structure of the venous needle sheath, if there is a collision or extrusion, it is very likely to cause the venous needle sheath to bend and deform , the distance between the front sheath and the rear folded piece will increase accordingly. At this time, the limit step will fail to fix the needle wing of the venous needle; The force point of the finger, the whole venous needle is easy to be skewed due to the force, causing injury to the patient; the inward convex top set on the side wall of the front end of the front sheath, although it can compress the infusion tube to make it There is no displacement effect, but in actual use, the protrusion compresses the infusion tube from beginning to end, resulting in a change in the inner diameter of the tube, and the flow rate of the liquid medicine is unstable or even cut off during clinical treatment. The interaction force of the infusion tube, pulling the flap to send the venous needle into the sheath will be subject to greater resistance, making this operation difficult and reducing the practicability of the sheath; the venous needle of the current medical puncture needle, Epoxy resin is commonly used as the adhesive between the steel needle and the needle seat. The curing temperature required for this adhesive is 80°C. During the curing process, the wings made of polyvinyl chloride are likely to deform due to the high temperature. It has little effect on ordinary puncture needles, but if applied to the sheath, the bent or deformed tabs will not be able to slide smoothly between the front sheath and the rear fold; moreover, the injection molded material used in the sheath has a Its performance also has a great influence. At present, polyethylene is generally used in similar devices. However, during the cooling process after experiencing high injection molding temperature, the front sheath and the rear folded piece will shrink, resulting in slight bending. At this time, the front part The distance between the sheath and the rear folded piece will increase, and the inclined protrusions and limit protrusions will fail accordingly, and cannot play the role of fixing the venous needle

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