Drug loading cutting balloon

Abstract

The invention provides a drug loading cutting balloon. The drug loading cutting balloon is applied to being fed into human blood vessels via catheters to cut and deliver drug to lesions on inner walls of the blood vessels. The drug loading cutting balloon is characterized by comprising a balloon body and a plurality of cutter sets, wherein the balloon body is in a hollow ellipsoidal shape; the plurality of cutter sets are arranged on the surface of the balloon body, and every cutter set is composed of a plurality of cutting blades, which are arranged on the same circumference and extend in the circumferential direction of the balloon body; the balloon body is provided with a plurality of drug loading areas for applying drug. According to the drug loading cutting balloon, the cutting blades extend in the circumferential direction of the balloon body, so that, when in a contracted state, the balloon body can easily pass through the devious blood vessels to reach the narrow parts of the blood vessels, and when in an expanded state, can avoid uneven stressing during cutting, and further can well cut and dilate the narrow parts of the blood vessels where calcified plaques exist.

Description

technical field [0001] The invention belongs to the field of medical devices and relates to a cutting balloon, in particular to a drug-loaded cutting balloon. Background technique [0002] Vascular stenosis is a vascular lesion that may occur in systemic arteries such as coronary arteries, cerebral arteries, carotid arteries, and arteries of the lower extremities. Its main causes are atherosclerosis, Takayasu and radiation therapy. [0003] At present, interventional treatment methods such as balloon dilation or stent placement are often used in clinical practice to dilate the stenotic part of the blood vessel, but this method is likely to stimulate the intima of the blood vessel, cause intima hyperplasia and lead to vascular restenosis . In addition, in some severely calcified vascular stenosis lesions, it is difficult for the balloon to fully expand the blood vessel, and it is also difficult for the stent to be fully released in such a blood vessel. Therefore, the traditi...

AI Technical Summary

Problems solved by technology

However, such a longitudinal blade not only makes it difficult to smoothly pass through the tortuous blood vessels when the balloon is inflated, but also easily receives uneven force when cutting the calcified plaque in the balloon-inflated state, resulting in incomplete or excessive cutting

In addition, during the treatment of some Takayasu arteritis, the narrowed part of the blood vessel needs to be administered, and such a cutting balloon cannot perform the operation of administering the drug while dilating the blood vessel.

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