Balloon catheter

Abstract

The invention discloses a balloon catheter, which comprises: a hypotube having an expansion chamber; an inner tube having an expansion chamber, and an outer tube having an outer diameter, wherein theinner tube is located inside the outer tube, the inner tube and the outer tube are coaxially arranged on the longitudinal axis, and a distal end of the hypotube is located between a proximal end of the outer tube and a proximal end of the inner tube; a balloon having only a tapered portion, wherein the proximal end of the balloon is coupled to the distal end of the outer tube, the distal end of the inner tube is positioned within the balloon and coupled to the distal end of the balloon; and a plurality of guide wires located between the inner tube and outer tube, wherein the proximal end of each guide wire is fixed to the distal end of the hypotube. The balloon catheter of the present invention can ensure the flexibility of the guide wire at the distal end while ensuring the pushing performance and anti-bendability of the guide wire at the distal end, and can smoothly pass the balloon catheter through the small lesion to improve the penetration performance of the balloon catheter.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a balloon catheter. Background technique [0002] In the balloon catheter, the guide wire in the balloon catheter is mainly used to increase the pushability and bending resistance performance, and the comprehensive index of these two performances can be expressed by deflection. [0003] The pushing force of the guide wire is the ability of the guide wire to pass through the lesion under the action of the operator manipulating the push rod outside the body. In the case of guidewires of the same material, pushability depends on the bending stiffness of the guidewire. The bending stiffness of the guide wire is related to the diameter of the guide wire, the thicker the guide wire, the better the pushability. However, the larger the diameter of the guide wire, the larger the inner diameter of the outer tube of the balloon catheter, so the outer diameter of the outer tube is also lar...

AI Technical Summary

Problems solved by technology

Moreover, when the guide wire retrograde technique needs to be applied, the outer diameter of the outer tube is relatively large, which is easy to limit the selection of small-diameter blood vessels such as the septal branch that the balloon catheter passes through, which affects the implementation of the surgical method.

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