Anti-needling, double-exhaustion, double-blood-return and anti-backflow cannula remaining transfusion needle

Abstract

The invention relates to an anti-needling, double-exhaustion, double-blood-return and anti-backflow cannula remaining transfusion needle. The needle comprises a catheter base, a catheter and an isolation plug, wherein a middle cavity of the catheter base is communicated with a bypass port, the bypass port is communicated with an external joint through a hose, and a liquid stop clip is arranged onthe hose; the liquid stop clip comprises a body consisting of a first guide hole, a second guide hole and a clamp buckle and clamp jaw structure, a first clamp bulge and a second clamp bulge for clamping the hose penetrating through the first guide hole and the second guide hole at a clamp point are arranged on the body, and a positioning groove for accommodating the hose is formed in any one of the first clamp bulge and the second clamp bulge; an annular connecting structure is arranged at one end, connected with the external joint, of the hose, one end of the external joint is connected withthe annular connecting structure of the hose, and the external joint comprises an annular inner flange for wrapping the annular connecting structure. The needle has the advantages as follows: the needle is anti-needling, high in blood return speed and capable of avoiding the liquid leakage risk.

Description

technical field [0001] The invention relates to a medical device, in particular to an anti-acupuncture double-exhaust double-return anti-backflow sleeve indwelling infusion needle. Background technique [0002] Indwelling intravenous cannula needles include a flexible catheter / cannula that can be indwelled in a blood vessel, and a stainless steel puncture guide core. When in use, the catheter and the needle core are punctured into the blood vessel together. After the catheter has completely entered the blood vessel, the needle core is withdrawn, and only the soft catheter is left in the blood vessel for infusion therapy. [0003] During the infusion process, when the cannula indwelling infusion needle is used in connection with various infusion sets, the air in the infusion set tube must be exhausted to ensure that there is no residual air in the infusion tube and keep the line unblocked. [0004] After searching, the patent CN 207221083 U discloses a kind of indwelling inf...

AI Technical Summary

Problems solved by technology

[0004] After searching, the patent CN 207221083 U discloses a kind of indwelling infusion needle with double exhaust anti-acupuncture cannula, including a catheter assembly and a steel needle assembly. The catheter assembly mainly includes a catheter seat, a catheter and an isolation plug. The steel needle assembly mainly includes a steel needle. And the steel needle seat at the end of the steel needle; an anti-stab safety device is slidably inserted into the steel needle seat, and the anti-stab safety device includes an integrally injection-molded cylindrical shell injection molded part and embedded in the cylindrical shell The metal skeleton in the injection molded part; a limit protrusion is provided on the steel needle at the end of the steel needle tip, and a side hole is opened on the side of the steel needle between the needle tip of the steel needle and the limit protrusion; The end of the steel needle seat is provided with an exhaust guide hole, and an exhaust plug is installed in the exhaust guide hole, and the cross-sectional area of ​​the exhaust plug is larger than the internal cross-sectional area of ​​the exhaust guide hole; The indwelling infusion needle with the punctured cannula is stab-proof, can discharge the air in the indwelling needle, returns blood quickly, and can exhaust successfully at one time; However, there are still some defects: 1. When the patient moves his hand accidentally during the infusion process, the hose will move in the stop clamp, causing bending, so that the medicine solution cannot flow smoothly into the human body, affecting the hanging tube. Water; 2. The hose and the external joint are connected by a direct connection structure, and there is a risk of leakage

Images