Central venous catheter

Abstract

The invention discloses a central venous catheter. The central venous catheter comprises a double-cavity catheter body, a connection seat and an extension tube in sequential connection and communication. A main cavity of the catheter body is provided with a needle seat structure at an opening position of the connection seat, a puncture needle can be inserted into the main cavity of the catheter body through the needle seat structure, and the needle seat structure can be further connected with a syringe. The double-cavity catheter body is 16-20cm and graduated on the surface, the double-cavity catheter body is provided with catheter fixing wings, and one surface, adhered to human skin, of each catheter fixing wing is provided with an adhesive structure. The central venous catheter has advantages that utilization of guide wires in a puncture catheter of a deep venous system is avoided, conventional use of a skin expander can be omitted, an operation process is simple, convenient and easy to control, and firmness in skin fixation, low human injuries, safety and reliability are realized.

Description

technical field [0001] The invention relates to the field of clinical medical devices, in particular to a double-cavity central venous catheter for deep venous system puncture and catheterization. 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 importa...

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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