Aortic Cannulation for Extracorporeal Ventricular Assist Systems
A ventricular assist and aortic technology, applied in the direction of dialysis systems, catheters, drug devices, etc., can solve the problems of difficult operation, increase the outer diameter of cannula, mechanical strength and flexibility, etc., to avoid impact injury, Improved safety and high mechanical strength
Active Publication Date: 2022-08-05
中国医学科学院阜外医院深圳医院
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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
Method used
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Embodiment Construction
[0023] like Figure 1 to Figure 13 As shown, the aortic cannula 10 used in the extracorporeal ventricular assist system of the present invention includes a tubular insertion portion 11, a tubular intermediate portion 12 and a tubular connecting portion 13 connected in sequence, and a gap 14 is provided on the outlet of the insertion portion 11, and the insertion portion 11 There is an opening 15 on the side wall close to the outlet, and an elastic suture ring 16 that can be bent and opened on the position where the insertion part 11 and the middle part 12 are connected is provided, which is conducive to being sutured on the outer wall of the aorta 30, wherein: The insertion part 11, the middle part 12 and the connecting part 13 all include an outer layer 21 and an inner layer 23, the outer layer 21 is outside, and the inner layer 23 is inside; for the insertion part 11 and the middle part 12, between the outer layer 21 and the inner layer 23 There is also a thin flat superelas...
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The invention discloses an aortic cannula for an extracorporeal ventricular assist system, which comprises a tubular insertion part, an intermediate part and a connecting part which are connected in sequence; the outlet of the insertion part is provided with a notch; An opening is provided, and an elastic suture ring that can be bent and unfolded and is convenient for sewing is provided on the position where the insertion part is connected with the middle part. The insertion portion, the intermediate portion, and the connecting portion each include an outer layer and an inner layer. Flat superelastic reinforcing wires are arranged between the outer layer and the inner layer of the insertion part and the middle part, and the superelastic reinforcing wires are continuously arranged in a spiral line along 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 by a liquid dip molding process, and the inner layers of the insertion part, the middle part and the connecting part are integrally formed by a liquid dip molding process. The invention has the advantages of portability, high mechanical strength, good flexibility, good blood diversion and diffusion effects, avoiding the aorta from being impacted by blood, and has high medical safety.
Description
technical field [0001] The present invention relates to a medical cannula, especially an aortic cannula used in 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, extracorporeal ventricular assist system systems have been widely used in patients with severe heart and lung diseases, as well as in 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 which, the physical structure and mechanical properties of the cannula determine its availability and blood circulation. As a result, the preparation material of the cannula, especially its surface material, det...
Claims
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IPC IPC(8): A61M1/16A61M1/36A61M25/00
CPCA61M1/3666A61M1/1621A61M1/1698A61M1/3621A61M25/0021A61M25/0045A61M25/0068A61M25/005A61M25/007A61M2202/0413A61M2025/0063A61M2202/0021
Inventor 赵光锋胡盛寿
Owner 中国医学科学院阜外医院深圳医院