Multifunctional indwelling needle

Abstract

The invention relates to a multifunctional indwelling needle comprising a sleeve tube assembly and a steel needle assembly. The multifunctional indwelling needle is characterized by further comprising an anti-reflux valve, an anti-puncture safety device and a non-needle positive pressure connector, wherein the anti-reflux valve is arranged in the middle cavity of a sleeve tube seat and located at the front end of a hose communicated with the sleeve tube seat in the axial direction of the sleeve tube seat; the anti-puncture safety device is arranged on a steel needle seat, and the non-needle positive pressure connector is arranged on an external connector; the anti-puncture safety device is a non-spring anti-puncture safety device, and the non-needle positive pressure connector is a non-spring non-needle positive pressure connector. Blood can be prevented from overflowing to cause pollution due to the sealed structure; the situation that because a medical worker is punctured when the steel needle is pulled out, the medical worker catches a disease is avoided; anti-reflux double protection avoids accidental conditions caused by a single measure, the multifunctional indwelling needle is safe and reliable at work, the problems caused by blood reflux are avoided, and working efficiency of the medical worker is improved. Meanwhile, the non-spring structure avoids the corrosion problem caused by a spring structure, the multifunctional indwelling needle is safer and more sanitary, and steady and reliable working of the indwelling needle is ensured.

Description

technical field [0001] The invention relates to an indwelling needle, in particular to an airtight multifunctional indwelling needle with anti-stab, anti-backflow, stable and reliable operation, safety and sanitation. Background technique [0002] Venous indwelling needles are also called venous trocars, because they can reduce the pain caused by repeated venipuncture and the fear of injections, relieve anxiety, facilitate clinical medication, rescue medication for acute and critical patients, and reduce the work of nurses. Therefore, intravenous indwelling needles are widely used in clinical practice. The components of the indwelling needle core include a soft catheter / cannula that can be indwelled in the 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 lef...

AI Technical Summary

Problems solved by technology

[0008] The disadvantage of the above two methods is that a spring needs to be used to realize it. If the spring cannot be deformed and reset smoothly, the protection of the needle tip of the steel needle cannot be realized, so it is not reliable enough

[0009] In the anti-reflux type indwelling needle structure, the authorized announcement number CN 201257220Y discloses an anti-reflux indwelling needle, which performs the anti-reflux function by fixing an anti-reflux valve in the trocar catheter seat; It is realized by setting a positive pressure joint on the needle; both of them have the disadvantage of a single measure, for example, the anti-reflux valve may not be completely closed, and in the positive pressure joint structure, if the medical staff pulls out the infusion set too quickly Fast, the positive pressure connector is too late to form a positive pressure, and there may also be blood back phenomenon, and the reliability is slightly poor

[0010] In addition, the current positive pressure joints also have certain defects: for example, the application publication number CN 101912664A discloses a disposable positive pressure joint, which uses a spring to provide positive pressure on the positive pressure joint, which affects the rust resistance and safety of the spring. Hygienic requirements are very high

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