Indwelling needle with infusion channel with variable radial size

Abstract

The invention discloses an indwelling needle with an infusion channel with a variable radial size, which comprises an indwelling catheter assembly and a puncture needle assembly, and is characterizedin that the indwelling catheter assembly comprises an indwelling base and a hollow indwelling catheter arranged at a first end of the indwelling base and communicated with the indwelling base; the puncture needle assembly comprises a puncture needle body and a puncture needle base arranged at one end of the puncture needle body. The other end of the puncture needle body is a puncture end, and thepuncture end enters from the second end of the indwelling base and penetrates out from the orifice of the indwelling catheter; the first end of the indwelling base is communicated with the second endof the indwelling base; wherein the hollow part of the indwelling catheter is an infusion channel through which infusion liquid flows in the using process of the indwelling needle, and in the indwelling process, the radial size of the infusion channel can be increased. According to the indwelling needle with the infusion channel with the variable radial size, the puncture pain of a user can be reduced; in the operation process, the function of rapidly supplementing liquid can be achieved by enlarging the infusion channel.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to an indwelling needle whose radial dimension of an infusion channel can be enlarged. Background technique [0002] Surgery is a very common traumatic operation in clinical practice. Bleeding usually occurs during the treatment process. The more complex the operation, the more bleeding. However, the total circulating blood volume of the human body only accounts for 7%-8% of body weight. Therefore, in order to ensure the safety of patients during the operation, fluid supplementation must be carried out during the operation to ensure the necessary circulating blood volume of the human body. The existing supplementary method is generally infusion. Generally speaking, the indwelling needle is inserted into the blood vessel, and then the liquid is injected into the patient's body through the catheter and the indwelling needle by gravity or external force. Then the a...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems that multiple indwelling needles need to be placed in order to ensure the safety of the operation during the clinical operation, which will increase the pain of the patient, and that the indwelling with a large aperture has high requirements for the puncture operation of the clinical staff and the patient feels a strong pain. The present invention provides A kind of indwelling needle with variable radial size of infusion channel

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