Venous indwelling needle

Abstract

The invention provides a venous indwelling needle, belonging to a field of medical apparatus. The venous indwelling needle provided in the invention overcomes insufficiency of the puncture needle existing in the venous indwelling needle with a present structure, wherein the puncture needle can cut off human tissue, and causes blocking of a blood return hole and low strength of a needle rod. The venous indwelling needle provided in the invention comprises a puncture needle and a transfusion needle sleeved on the needle rod. of the puncture needle. Improvement provided in the invention is that the blood return hole composed of an axis hole and a side through hole on the puncture needle rod is canceled, thereby the whole puncture needle is solid; a section of axial direction flat section or axial direction groove is arranged on the needle rod on the narrowed port of the front end of the transfusion needle tubing, and a blood return through hole is formed between the narrowed port of the transfusion needle tubing and the axial direction flat section or the axial direction groove on the transfusion needle rod. The venous indwelling needle provided in the invention has the advantages that phenomenon of human tissue cutting does not exist in the puncture process because of non-existence of the blade formed on the inclined plane of the needle point. With the venous indwelling needle provided in the invention, no blood return or slow blood return due to blocking of the needle tubing of the puncture needle in the prior art are avoided so as to eliminate fault. t Excavation part of the cross section of the puncture needle rod is small for keeping out a blood return channel, and strength of the needle rod is strengthened. The venous indwelling needle provided in the invention has characteristics of bending resistance and flexural resistance, such that security of usage is improved.

Description

technical field [0001] The invention belongs to medical equipment, in particular to a needle for injection. Background technique [0002] The intravenous indwelling needle is composed of a puncture needle and a soft plastic material infusion needle covered on the puncture needle. During the initial infusion, the puncture needle brings the needle shaft of the infusion needle into the vein. The hole is injected into the blood vessel. After completing an infusion, leave the infusion needle in place and use it again for the next infusion. The infusion needle can stay in the human body for nearly 100 hours. Based on the medical advantages and technical factors of intravenous indwelling needles, it has been widely used in more developed countries abroad. In recent years, domestic applications are also gradually increasing. The use of disposable venous indwelling needles in intravenous infusion reduces the number of venipunctures and prolongs the interval between venipunctures. ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of venous indwelling needle, which is used for infusion treatment of patients, and overcomes the disadvantages that the puncture needle in the venous indwelling needle of the existing structure will cut off human tissue and the strength of the front end of the needle bar is low.

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