Balloon dilatation catheter

Abstract

The invention provides a balloon dilatation catheter. The balloon dilatation catheter comprises a balloon, an inner cavity tube and an outer cavity tube, wherein the balloon comprises a far-end balloon tube leg, a far-end conical surface part, a balloon part, a near-end conical surface part and a near-end balloon tube leg which are arranged in sequence; the inner cavity tube is arranged in the balloon and penetrates through the balloon; the tube wall of the inner cavity tube is in contact with the far-end balloon tube leg and is provided with a small hole; the tube wall of the far end of the outer cavity tube is in contact with the near-end balloon tube leg; and the near end of the inner cavity tube extends into the outer cavity tube and is connected with the tube wall of the outer cavitytube to form a wire guiding opening. Compared with the prior art, the balloon dilatation catheter provided by the invention has the advantages that the small hole is formed in the far end, and the wire guiding opening, the small hole and a tail end opening can form a channel for continuously injecting blood, so that the blood is continuously injected during wire guiding; meanwhile, the inner cavity tube with a three-layer structure has relatively high anti-pressure capability and can keep the blood normal after the balloon is dilated; the inner cavity tube does not collapse; and the supply ofthe far-end blood is kept.

Description

Technical field [0001] The invention belongs to the technical field of medical devices, and particularly relates to a balloon dilatation catheter. Background technique [0002] Acute vascular occlusive disease is now the main cause of death in the Chinese population. It includes acute myocardial infarction, cerebral infarction, and peripheral arterial embolism. For patients with acute vascular occlusive disease, the first choice is emergency interventional treatment to open the infarct-related blood vessel and then continue to infuse the infarct area; however, in the emergency interventional treatment process, directly opening the occluded blood vessel will bring further damage. This is ischemia-reperfusion injury, which leads to further damage to the organs in the infarct area. [0003] The traditional method of interventional treatment of acute vascular occlusive disease is to use intravascular guide wire and balloon to quickly open the acutely occluded blood vessel. However, af...

AI Technical Summary

Problems solved by technology

With this design, in the face of vascular stenosis and occlusion symptoms, since the surface of the balloon is designed with multiple chambers, the balloon cannot fully contact with the lesion after opening, resulting in unsatisfactory treatment effect

Moreover, in the face of vascular lesions in special clinical parts, such as spontaneous or iatrogenic aortic dissection involving the openings of main b...

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