Double-cavity central venous catheter

Abstract

The invention discloses a double-cavity central venous catheter, which comprises a double-cavity catheter, a connecting base and an extension tube which are connected and communicated sequentially, wherein a catheter main cavity and a catheter lateral cavity are formed in the double-cavity catheter; the catheter lateral cavity is connected with the extension tube by the connecting base; the catheter main cavity is not provided with the extension tube and has a needle bed structure at an opening of the connecting base; a puncture needle can be inserted into the catheter main cavity by the needle bed structure, and the needle bed structure also can be connected with an injector; and a movable float structure is arranged on the catheter. According to the double-cavity central venous catheter, guiding guide wires are not needed to be used in the puncture catheter placement of a deep venous system, and the conventional use of a skin dilator also can be avoided, so the double-cavity centralvenous catheter is easy and convenient to operate, and easy to control, safe and reliable, and slightly damages a human body; and skin is fixed firmly.

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 existing central venous catheters are designed to be 20 cm in length. In clinical practice, the insertion depth of the adult through the internal jugular and subclavian puncture routes is about 12 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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