Balloon micro catheter

Abstract

The invention discloses a balloon micro catheter, and belongs to the technical field of medical instruments. The balloon micro catheter comprises a catheter body, a balloon, a developing ring, a catheter base, a first extension tube, a second extension tube and a filling connector; the catheter body is composed of an outer tube and an inner tube which are coaxial, an inner cavity of the catheter body is a wire guide cavity, a reinforcing rib structure on the catheter body divides an annular hole channel between the inner tube and the outer tube into a first filling cavity and a second filling cavity, and the developing ring is fixedly connected to the catheter body; and the balloon is fixedly connected to the far end of the catheter body, and an inner cavity of the balloon communicates with the first filling cavity and the second filling cavity. The balloon micro catheter has the advantages that: when the balloon is prepared before an operation, the exhaust is simpler and more thorough, the preoperative preparation time is shortened, and the problem of poor developing effect of an air embolism or the balloon is avoided; the problem of bending of the balloon and the inner tube is solved, and the risk of excessive embolism caused by the banana effect is reduced; and the balloon with a blocked filling channel can retract under relatively low negative pressure, the retraction process of the balloon is accelerated, and the accident rate is reduced.

Description

technical field [0001] The invention relates to a balloon microcatheter and belongs to the technical field of medical instruments. Background technique [0002] Transcatheter arterial chemoembolization (TACE) is an emerging tumor interventional therapy, which infuses chemoembolization reagents into the target lesion area through a microcatheter, so that the tumor cells are degenerated and necrotic due to ischemia. However, a small amount of embolic agent will inevitably flow back into the non-target lesion area during the infusion process, resulting in capillary bed occlusion, swelling or ischemic injury (such as stroke, infarction, tissue necrosis, etc.) in the unexpected area. [0003] Balloon microcatheter is to add a compliant balloon on the basis of microcatheter. Before infusing the embolization reagent, the balloon needs to be inflated to make its appearance and contour adapt to the pathological structure of the target lesion to form a "local blockage", thus effective...

AI Technical Summary

Problems solved by technology

However, the balloon was filled and retracted many times before and during the operation, and the viscosity of the imaging reagent was high or solidified, which made the filling channel blocked, making it difficult or even impossible to retract the balloon.

The operator has to constantly pull and move the inflated balloon in an attempt to take it out of the body, which may easily cause vascular dissection or even rupture of the parent artery

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