A delivery system for one-handed precise release of stents

Abstract

The invention relates to a minimally invasive intervention medical instrument, in particular to a delivery system capable of precisely releasing a scaffold with single hand. An outer tube is connected to a sliding block; a push rod is connected to an inner tube and a Luer joint; the outer tube is sleeved outside the inner tube; a hollow structure is formed by two sliding rods; the far ends and the near ends of the sliding rods are respectively fixed by a front fastener and a rear fastener; the outer surfaces of the sliding rods are provided with threaded structures; turning wheel mechanisms are formed by rapid-release buttons and turning wheels; the turning wheel mechanisms are sleeved on the sliding rods; and when the turning wheel mechanisms rotate, the sliding block, inside the sliding rods, can drive the outer tube and the inner tube to do relative motion, so that the scaffold loaded therein is pushed out and released. The delivery system disclosed by the invention has the beneficial effects that during an operation, a handle is held in one hand and the scaffold is released, and radiography observation is conducted by the other hand at the same time; meanwhile, by virtue of a sheath canal which is good in mechanical delivery performance, the scaffold is released on a lower-extremity vascular lesion part, so that the release position can be precisely controlled and the probability of vascular restenosis due to inaccurate scaffold release can be reduced; and in addition, the delivery system also has the advantages of simple structure, convenient operation and the like.

Description

technical field [0001] The invention relates to a minimally invasive interventional medical device, in particular to a delivery system for one-handed precise release of a stent in a lesion in a blood vessel of a lower extremity. Background technique [0002] The incidence of lower extremity vascular diseases has increased significantly in recent years. Common ones include arteriosclerotic occlusive disease, arteriovenous thrombosis, aneurysm, etc.; lower extremity arteriosclerotic occlusive disease can only be delayed by antihypertensive, lipid-lowering, anti-platelet aggregation and other treatments. The progression of the lower extremity arteriosclerosis occlusion cannot fundamentally eliminate the stenosis and occlusion of the blood vessels in the lower extremity arteriosclerosis occlusion. Lower extremity arteriosclerosis obliterans surgical vascular intimal stripping, artificial blood vessel replacement, bypass reconstruction surgery trauma, high risk, especially not su...

AI Technical Summary

Problems solved by technology

The stent delivery system involved in the above-mentioned patent has a complex structure, inconvenient operation, and does not completely solve the problem of precise release of the stent

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