Injector with fluid infusion function

Abstract

The invention discloses an injector with a fluid infusion function.The injector comprises a needle cylinder.A piston is arranged in the needle cylinder in a matched mode.The outer surface of the needle cylinder is provided with a fixed ring.Two finger rings are symmetrically arranged on the circumferential face of the fixed ring.The front end of the needle cylinder is provided with a needle head holder.A fluid drainage tube is sleeved with the needle head holder and is in threaded connection with the needle head holder.The fluid drainage tube is provided with a needle head.Sliding slots are formed in the two sides of the needle head holder.Protective sleeves are clamped in the sliding slots.The side wall, close to the fluid drainage tube, of the needle cylinder is provided with a fluid infusion opening.The fluid infusion opening is provided with a fluid inlet one-way valve.The fluid inlet one-way valve is connected with a fluid inlet tube.The fluid inlet tube is connected with a fluid infuser.The structure is simple, use is convenient, fluid can be infused to the needle cylinder conveniently, and fluid medicine will not flow back; the needle head holder can be matched with the fluid outlet tube for threaded connection, so that the needle head is fixed and prevented from being disengaged, and the injector is low in cost and suitable for being used and popularized.

Description

technical field [0001] The invention relates to a medical device, in particular to a syringe with the function of replenishing liquid. Background technique [0002] When using a syringe for injection, most of them rely on manual control of the injection volume. However, in clinical trials, sometimes precise injection is required. When using a syringe to inject a patient intramuscularly, it will be accompanied by a strong sense of pain. The reason for the pain is that the needle will cause a tingling sensation after being inserted into the muscle, and during the injection process, the injected liquid has a certain pressure, which will cause certain pain to the human body. It swings unnaturally, and a little carelessness will cause the needle to fall off; and the syringe in the prior art needs multiple injections once it encounters a large amount of injection for the patient, but this increases the pain of the patient, and the traditional syringe The surface of the syringe is...

AI Technical Summary

Problems solved by technology

[0002] When using a syringe for injection, most of them rely on manual control of the injection volume. However, in clinical trials, sometimes precise injection is required. When using a syringe to inject a patient intramuscularly, it will be accompanied by a strong sense of pain. The reason for the pain is that the needle will cause a tingling sensation after being inserted into the muscle, and during the injection process, the injected liquid has a certain pressure, which will cause certain pain to the human body. It swings unnaturally, and a little carelessness will cause the needle to fall off; and the syringe in the prior art needs multiple injections once it encounters a large amount of injection for the patient, but this increases the pain of the patient, and the traditional syringe The surface of the syringe is smooth and prone to slipping

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