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, easy breakage, low drug utilization rate, etc., and achieve the effects of easy operation, control of drug administration time, and simple operation process

CN113599039APending 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 and a drug delivery device, wherein the outer tube slidably sleeves the inner tube, and 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. According to the retractable drug perfusion stent system, the micro-holes are formed in the perfusion micro-tube, after the perfusion micro-tube reaches a lesion position, the perfusion micro-tube is switched from a folded state to an expanded state, at the moment, the perfusion micro-tube is separated from the limitation of the outer tube and automatically expands to be attached to the blood vessel wall and expand a target lesion, the drug delivery device feeds a drug into the perfusion micro-tube through the perfusion tube, and the drug is delivered to the target lesion through the micro-holes of the perfusion micro-tube. The drug perfusion stent cannot be retained in the body of a patient, meanwhile, the blood flow cannot be blocked in the mode, 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

[0031] 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.

[0032] 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, ...