Microcatheter with dual lumens

Abstract

The invention provides a microcatheter with double cavities, which comprises a first catheter body with a near-end section, a transition section and a far-end section which are connected in sequence and a second catheter body jointed on the periphery of the first catheter body, the second catheter body is provided with a connecting section jointed on the periphery of the first catheter body and atip section which is connected with the connecting section and is gradually shrunk, and the near-end section is provided with a first inner layer forming a first guide wire inner cavity, a spring layer wound on the first inner layer in a winding mode and arranged in the length direction of the first inner layer, a woven layer arranged on the outer side of the spring layer, and a first polymer layer covering the outer side of the woven layer. The transition section is provided with a first inner layer extending from the near-end section, a woven layer extending from the near-end section and partially covering the outer side of the first inner layer, and a first polymer layer extending from the near-end section and covering the outer side of the braided layer. The far-end section has a firstinner layer extending from the transition section, and a first polymer layer extending from the transition section and covering an outer side of the first inner layer.

Description

technical field [0001] The present disclosure relates to a microcatheter with a double lumen. Background technique [0002] With the development of society and economy, profound changes have taken place in the national lifestyle, especially the aging of the population and the acceleration of urbanization. The prevalence of risk factors for cardiovascular disease in China is obvious, leading to a continuous increase in the number of cardiovascular diseases. At present, there are about 2.2 million patients suffering from chronic total occlusion of coronary arteries in my country. [0003] Chronic total occlusion (CTO) of the coronary artery refers to a lesion in which the coronary artery is 100% occluded for more than 3 months, and a guide wire is required to pass through the CTO lesion. In order to improve the success rate of the guide wire passing through the lesion, it is usually necessary to use a microcatheter in conjunction with the guide wire. After the guide wire fir...

AI Technical Summary

Problems solved by technology

[0005] In the prior art, when the operator presses in the distal direction, the catheter may be bent midway

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