Aortic cannula for extracorporeal ventricular assist system

Abstract

The invention discloses an aortic cannula for an extracorporeal ventricular assist system. The aortic cannula comprises a tubular insertion part, a middle part and a connecting part which are sequentially connected, a notch is formed in an outlet of the insertion part, an open hole is formed in the side wall, close to the outlet, of the insertion part, and a circle of elastic suture ring which can be bent and opened and is beneficial to suture is arranged at the position where the insertion part is connected with the middle part. The insertion part, the middle part and the connecting part each comprise an outer layer and an inner layer. Flat hyperelastic reinforcing wires are arranged between the outer layers and the inner layers of the insertion part and the middle part, and the hyperelastic reinforcing wires are continuously arranged in a spiral line shape in the length direction of the middle part and the insertion part. The outer layers of the insertion part, the middle part and the connecting part are integrally formed through a liquid plastic dipping process, and the inner layers of the insertion part, the middle part and the connecting part are integrally formed through the liquid plastic dipping process. The aortic cannula for the extracorporeal ventricular assist system has the advantages of being light, high in mechanical strength, good in flexibility, good in blood diversion and diffusion effect, capable of preventing aorta from being impacted and damaged by blood and high in medical safety.

Description

technical field [0001] The invention relates to a medical cannula, in particular to an aortic cannula for an extracorporeal ventricular assist system. Background technique [0002] The extracorporeal ventricular assist system is a system that realizes the circulation of blood in the functional areas of the human body through an extracorporeal mechanical circulation device. At present, the extracorporeal ventricular assist system has been widely used in patients with severe heart and lung diseases, as well as critically ill patients waiting for organ transplantation. In the extracorporeal ventricular assist system, the cannula, as a device directly in contact with human tissue, plays a decisive role in the function and effect of the entire system. Among them, the physical structure and mechanical properties of the cannula determine its usability and blood circulation. As a result, the preparation material of the cannula, especially its surface material, determines its safety...

AI Technical Summary

Problems solved by technology

However, the existing aortic cannula still has the following problems: First, mechanical strength and flexibility cannot be combined

Second, the thickness, overall strength and flexibility of the cannula cannot achieve an optimal combination

Third, due to the complexity of the structure of the aorta itself, it has special requirements for the opening of the cannula. The existing aortic cannula is not effective in diverting and stably transporting blood during the process of transporting oxygenated blood.

Fourth, the existing aortic cannula is fixed by means of a suture ring, but the suture ring greatly increases the outer diameter of the cannula, which has the disadvantage of being difficult to operate

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