Safe-type venous indwelling needle

Abstract

The invention discloses a safe-type venous indwelling needle. The needle includes a needle tube, a needle tube base and a cannula; a cannula base is sleeved with the needle tube base, the sleeved parts of the cannula base and needle tube base oppositely and axially slide for guidance, and axial axes refer to central axes of the needle tube and cannula; at least one elastic component which comprises a selectively compressible spring and can be deformed by an external force is arranged between the needle rube base and the cannula base; the indwelling needle also includes at least one needle tubebase handle which can be connected with the needle tube base integrally; a contact component capable of touching the cannula base under driving of an external force is arranged on each needle tube base handle; each contact component can not only be one area which can be in contact with the needle tube base and positioned on the corresponding needle tube base handle but also be a movable part which extends from the corresponding needle tube base handle and can be deformed by an external force; for example, a sheet extends from the corresponding needle tube base handle, and each contact component is provided with at least one part in contact with partial areas of the cannula base.

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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