Self-locking medical puncture needle and usage method

Abstract

The invention relates to a self-locking medical puncture needle and a use method thereof, comprising a puncture needle holder composed of a puncture needle steel needle, a puncture needle seat and a puncture needle wing, a hose, a bottom support and a safety device composed of an upper cover. The safety device is set outside the needle seat of the puncture needle. The medical operator performs clinical treatment or blood collection operation. After the operation is completed, the medical operator presses the safety device with one hand and pulls the rectangular parallelepiped handle backward with the other hand so that the puncture needle wings are in the gap on both sides. Sliding, the rectangular parallelepiped handle enters the limit hole and is blocked by the two baffles of the non-reverse member. The steel needle of the puncture needle completely enters the safety device, and the puncture needle can be safely removed and disposed of. The effect is: the self-locking medical puncture needle reduces the clinical puncture risk of the puncture needle, improves the safety of use, and also reduces the risk of medical waste disposal, and the improvement effect is obvious. The design is simple and flexible, and it can be applied to various types of intravenous infusion needles, medical blood collection needles and arteriovenous puncture needles, and has strong practicability.

Description

technical field [0001] The invention relates to a self-locking medical puncture needle and a use method, which are suitable for intravenous infusion needles, medical blood collection needles and arteriovenous puncture needles. Background technique [0002] Intravenous infusion needles, medical blood collection needles and arteriovenous puncture needles used in conjunction with infusion sets are the most common puncture devices in clinical practice. However, due to their puncture characteristics, these two devices have certain risks during use. The rate of sharp instrument stabbing accidents caused by more or unskilled medical staff is also relatively high. This kind of medical injury has received extensive attention. In addition, the recycling of this kind of waste medical waste will also bring great risks to the operator, and stabbing accidents with sharp objects also occur frequently. [0003] Patent No. ZL201310314017X is a utility model patent for a venous needle sheath...

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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