One-handed knitted intravascular stent conveying system and using method thereof

Abstract

A one-handed knitted intravascular stent conveying system comprises a duct unit and a conveying device, wherein the duct unit is connected with the conveying device and is driven by the conveying device; the conveying device comprises a shell; a lock sleeve, a guiding groove and a push button mechanism are arranged in the shell; the push button mechanism drives the duct unit; the lock sleeve is used for limiting movement of the push button mechanism; and a washing joint with functions of a one-way valve is arranged at the tail of the shell. When the conveying system is used, the conveying device is operated in a one-handed manner, and the other hand of a medical worker can carry out other operations; different movements of the push button mechanism are realized by a limiting sleeve with a zigzag groove and a shifting button, then initial stillness and releasing of a support are realized, and the one-handed knitted intravascular stent conveying system is simple to operate.

Description

technical field [0001] The invention relates to a single-handed braided vascular stent delivery system and a method for using the same, belonging to the technical field of minimally invasive medical devices. Background technique [0002] Human arteries are channels that transport blood from the heart to various parts of the body. Due to lipid deposition and plaque formation on the inner wall of the arteries, the lumen of the arteries can be narrowed or even blocked. This process is called atherosclerotic occlusion, resulting in Arterial ischemia. Limb arteriosclerosis obliterans is a disease in which atherosclerotic material in limb arteries continues to expand and secondary to thrombosis, causing arterial wall stenosis and occlusion, resulting in chronic or acute ischemic symptoms in limbs. [0003] At present, there are mainly two types of methods for the treatment of arteriosclerosis obliterans: drug therapy and surgical treatment. Drug therapy is mainly used for early ...

AI Technical Summary

Problems solved by technology

[0005] Due to the different lengths of the arterial occlusions of patients clinically, the length of the vascular stent is limited, resulting in a longer delivery stroke of the delivery system, the structure of the delivery system is limited, and it is not convenient for medical staff to operate. There is a certain resistance during the process, and there is also a certain friction in the pushing mechanism of the delivery system, which leads to a large push force required for the delivery system, which may easily lead to unstable delivery of the stent, and may cause stent jumping, tremors, etc., in severe cases. It may even cause the vascular stent to deviate, affecting the normal progress of the operation

When the clinically used stent is a braided stent, the stent is easily stretched or twisted and overlapped during the release process. When the stent is elongated, the axial support force is reduced, which is likely to cause long-term narrowing of the stent; , will affect blood vessel damage, and in severe cases, it is necessary to remove the stent through surgery, which will cause greater harm to the patient

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