Delivery and release device of aortic stent

Abstract

The invention discloses a delivery and release device of an aortic stent; the delivery and release device comprises a sheath core assembly, an outer sheath tube and a control handle for controlling the axial movement of the sheath core assembly and the outer sheath tube; the control handle comprises a support main body, a fixed handle and a sliding handle movably sleeving the support main body, and the outer sheath tube is connected with the sliding handle; the sheath core assembly is connected with the support main body; the sliding handle slides axially and performs circumferential rotary cooperation relative to the support main body; according to the axial position of the sliding handle, the sliding handle and the fixed handle are in axial attachment and separation states; the sliding handle and the fixed handle are in rotary cooperation in a liner contact mode in an attachment state. The liner contact mode is adopted between the fixed handle and the sliding handle, so the resistance is reduced, the smoothness and the hand feeling of the operation are improved, and the risk of part disintegration is avoided.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to a delivery and release device for a stent for treating aortic aneurysm and aortic dissection. Background technique [0002] Aortic diseases mainly include aortic true aneurysm, aortic pseudoaneurysm and aortic dissection. Among them, true aortic aneurysm is not a real tumor, but a local or general expansion of the aorta due to various reasons, and the aortic diameter is larger than the pathological change of more than 50% of the normal diameter. Aortic pseudoaneurysm is when the arterial wall is torn or pierced, and the blood flows out from the breach and is wrapped by the tissue adjacent to the aorta to form a hematoma, which is mostly caused by trauma. [0003] Aortic dissecting aneurysm is due to local damage to the aortic intima, high pressure blood flow rushes into the vessel wall, resulting in medial tearing (the splitting of the medial layer is usually at the interface betw...

AI Technical Summary

Problems solved by technology

[0009] In the prior art, the fixed handle and the sliding handle have contact parts that offset and cooperate. When the two are relatively rotated, the large contact area will generate a large rotational resistance. The fixed handle and the sliding handle generally adopt a split structure. Due to the excessive resistance, it is easy to Caused to be unscrewed by the circumferential resistance during the process of stress, resulting in failure to release during use

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