Central venous catheter

Abstract

The invention relates to the technical field of medical instruments, and discloses a central venous catheter. The catheter comprises a double-cavity catheter, a connecting seat and an extension tube which are sequentially connected and communicated; a catheter main cavity and a catheter side cavity are formed in the double-cavity catheter, and the catheter side cavity is connected with the extension tube through the connecting seat. The catheter is characterized in that the catheter main cavity has no extension tube; a needle seat structure is arranged at the position, at the opening of the connecting seat, of the catheter main cavity, a puncture needle can be inserted into the catheter main cavity through the needle seat structure, the needle seat structure can be further connected with an injector, the double-cavity catheter is 16-20 cm long, scales are arranged on the surface of the double-cavity catheter, a catheter fixing wing is arranged on the double-cavity catheter, and a pasting structure is arranged on the face, attached to the skin of the human body, of the catheter fixing wing. According to the technical scheme, the venous catheter does not need intervention of a guide wire in puncture catheterization of a deep vein system, a skin expander can be omitted, the operation process is simple and convenient, control is easy, harm to a human body is reduced, and safety and reliability are achieved.

Description

technical field [0001] The present invention relates to the technical field of medical equipment, more specifically, it relates to a central venous catheter. Background technique [0002] Central venous catheter placement is a commonly used monitoring and treatment method in clinical practice. Through a fixed central venous catheter inlet, it provides a simple and painless method for intravenous drug therapy, rapid blood transfusion and volume therapy for intraoperative hemorrhagic shock, total Parenteral central venous nutrition, blood transfusion and blood supplies, collection of blood samples, monitoring of central venous pressure, etc. Compared with single-lumen central venous catheters, double-lumen central venous catheters can simultaneously provide two independent infusion pathways with a higher flow rate, so Its clinical application is very extensive. [0003] Currently, double lumen central venous catheters play a very important role in clinical practice. Due to t...

AI Technical Summary

Problems solved by technology

Usually, an assistant is needed to connect the guide wire pusher to insert the guide wire. After withdrawing the puncture needle, use the guide wire to expand the skin with the skin dilator, and finally place the central venous catheter through the guide wire. The needle is unstable, the position of the needle tip is easy to deviate outside the blood vessel cavity, and the failure of catheterization, etc.

At the same time, due to the blind puncture operation, it is easy to have difficulty in placing the guide wire during the process of placing the guide wire, the guide wire is discounted and deformed when the dilator expands the skin, and the guide wire is blocked from exiting. Positioning puncture operation not only increases the incidence of puncture complications, but also seriously affects the operation convenience of the operator, repeatedly increases the pain of patients, and is not easy for beginners to master

[0005] In addition, the design length of the existing central venous catheters is 13 cm. In clinical practice, the insertion depth of the adult through the internal jugular and subclavian puncture routes is about 16 cm, and a section of the catheter lumen is usually exposed outside the skin. When the catheter is fixed In addition to suturing the fixed wing structure of the catheter percutaneously with needles and threads, it is usually necessary to tie a knot to fix the catheter wall, but there is no special fixing structure on the catheter at present.

Therefore, if the knot is too tight, the effective cross-section of the side cavity of the central venous catheter will be reduced, and the infusion resistance will increase; if the knot is too loose, the catheter will not be fixed effectively, and the catheter will easily shift and fall out when the patient's body position changes.

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