Retractable drug perfusion stent system

A stent system and drug technology, applied in the field of medical devices, can solve the problems of blocking blood flow, limiting drug-coated balloon adhesion time, drug absorption rate, low drug utilization rate, etc., achieving short time to block blood flow Effect

CN113599038APending Publication Date: 2021-11-05LEPU MEDICAL TECH (BEIJING) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-11-05

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Abstract

The invention provides a retractable drug perfusion stent system, and belongs to the technical field of medical apparatus and instruments. The system comprises an inner tube, an outer tube, a perfusion micro-tube, a perfusion tube, a balloon and a filling port, wherein the near ends of the inner tube and the outer tube are connected with a pushing device, and the far end of the inner tube is provided with a tip; the perfusion micro-tube is spiral, and micro-holes are formed in the perfusion micro-tube; the near end of the perfusion tube extends out of the near end of the outer tube and is connected with a drug delivery device; the filling port is suitable for communicating with an inflation device; the perfusion micro-tube has a folded state and an expanded state; and the balloon has an expanded state for supporting the perfusion micro-tube to be further expanded and cutting a target lesion. According to the retractable drug perfusion stent system, a drug perfusion stent cannot be retained in the body of a patient, meanwhile, the blood flow blocking time is short in the mode, blood is blocked only when the perfusion micro-tube is expanded for the second time, after the perfusion micro-tube is expanded for the second time, the balloon is contracted to the contracted state, drug delivery can be continuously carried out, the drug delivery time is controlled, the whole operation process is simple and convenient, and the retractable drug perfusion stent system is easy to operate.
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Description

technical field

[0001] The invention relates to the technical field of medical devices, in particular to a retractable drug perfusion stent system. Background technique

[0002] At present, endovascular interventional therapy has become the first choice for the treatment of lower extremity arteriosclerosis obliterans. This year, more and more medicine-carrying devices have been reported for the treatment of lower extremity arteriosclerosis obliterans, such as drug-eluting stents, drug-coated stents, Drug-coated balloons, etc. Compared with traditional balloon angioplasty and bare metal stents, drug-eluting stents and drug-coated balloons can effectively improve the patency rate of target lesions.

[0003] Among them, the drug-eluting stent will remain in the body permanently during use, but the physiological load of the lower extremity arteries is complex, the stent fracture rate is high, and the re-interventional surgery is difficult and the choice is small. Although the ...

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Embodiment Construction

[0033] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...