A kind of safe venous indwelling needle

Abstract

A safe venous indwelling needle, comprising a needle tube (11), a needle tube holder (12), a sleeve (14) and a sleeve seat (15); the needle tube seat (12) and the sleeve seat (15) are sleeved with each other, and the sleeved portions may slide relative to the axial direction under mutual guidance, at least one elastic component (18), which is deformed by an external force and which comprises a selectable compression spring (18a) therein, being provided between the needle tube holder (12) and the sleeve seat (15); further comprised is at least one needle tube seat handle (16) that may be integrated with the needle tube seat (12), the needle tube seat handle (16) being provided thereon with a contact component (17) that may contact the sleeve seat (15) under the drive of an external force; the contact component (17) may be a region on the needle tube seat handle (16) that may contact the sleeve seat (15), or may be a movable portion that extends from the needle tube seat handle (16) and that may be deformed by an external force, such as a sheet-shaped extension from the needle tube seat handle (16), at least one position on the contact component (17) being in contact with a portion of the area of the sleeve seat (15).

Description

technical field [0001] The invention relates to a safe intravenous indwelling needle, which belongs to the technical field of medical devices. Background technique [0002] Venipuncture and associated intravenous infusion is the most commonly used general technique in various clinical departments. When the infusion time is long, the indwelling needle with a flexible sleeve is most often used. The risk of veins; no matter what kind of venous needles, it is inevitable to face the challenge of individualized venipuncture process, which refers to the patient's skin thickness, skin hardness, vein exposure, vein thickness, vein depth, and vein wall hardness , venous curvature, and distribution of venous valves are all very different; individualized venipuncture must also consider the individualization of nurses' operations. [0003] Usually, during the venipuncture process using an indwelling needle, the skin near the puncture point is disinfected at the beginning, and then the f...

AI Technical Summary

Problems solved by technology

[0007] 1. When blood returns, the sharp tip of the indwelling needle tube penetrates the vein while continuing to insert the needle, resulting in puncture failure

[0008] 2. The venous pressure-dependent passive blood return method makes it difficult to see the blood return when the patient's venous pressure is low or other related conditions, and the tip of the needle tube that has already entered the venous lumen continues to advance through the vein wall, resulting in puncture failure

[0009] 3. Because the index finger below the needle base will inevitably come into contact with the skin adjacent to the puncture point after disinfection, when there are microorganisms on the index finger, it is very easy to contaminate the puncture point and cause pipeline-related bloodstream infection (CRBSI)

[0010] 4. Because the index finger under the needle tube seat will affect the selection of the needle insertion angle, that is, the angle between the needle tube and the skin, reducing the success rate of puncture

[0011] 5. The method of holding the needle handle with two fingers is poor in stability, and it is difficult to meet the individual needs of nurses

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