Bending-adjustable conveying system for interventional cardiac valve

Abstract

The invention discloses a bending-adjustable conveying system for an interventional cardiac valve. The system comprises an outer sheath tube, an core tube assembly which is arranged in the outer sheath tube and can relatively slide in the axial direction and an operation handle connected with the proximal ends of the outer sheath tube and the core tube assembly; a tube body of the outer sheath tube is provided with a distal end and the proximal end, the handle is connected with a traction wire for pulling the distal end of the tube body to bend, a distal end of the traction wire is connected with the tube body, the connection part is located at the distal end of the tube body or is adjacent to the distal end of the tube body, and at least one section of the traction wire is a free sectionwhich is free outside the tube body; the system is further provided with floating limit strips, proximal ends of the floating limit strips are starting ends fixedly arranged opposite to a fixing heador the core tube assembly, and the floating limit strips float between a mounting portion of the interventional cardiac valve and the outer sheath tube; the outer wall of the fixing head is provided with a positioning part used for being matched with a connecting lug of the interventional cardiac valve, the connecting lug is completely released in front of the outer sheath tube, and the floating limit strips are bound by the outer sheath tube to keep the cooperation between the connecting lug and the positioning portion.

Description

technical field [0001] The invention relates to the field of medical devices, and more specifically, the invention relates to a delivery device for implanting an artificial heart valve into the heart. Background technique [0002] Heart valvular disease is one of the most common heart diseases in my country, mainly due to valvular damage caused by rheumatic fever; in recent years, with the development of population aging, valvular degeneration (including calcification and mucus degeneration, etc.) Damage is also increasing in our country; in addition, congenital valvular disease is also one of the common causes of heart disease. A considerable number of patients with high risk of valvular heart disease, such as severe valvular insufficiency, elderly patients who are not suitable for surgical valve replacement, advanced tumors and valvular insufficiency, need new interventional methods with less trauma. Interventional heart valves are developed under the inspiration of surgic...

AI Technical Summary

Problems solved by technology

[0012] In the prior art, even if the traction wire is used, especially the traction wire is threaded as a whole and is bound in the pipeline or channel where it is located. Therefore, the interventional heart valve that needs to be greatly adjusted or the distal end of the sheath is enveloped is relatively long. It is difficult to meet the needs of bending adjustment under conditions such as hard, hard, etc., and because the bending is limited by the magnitude of the moment and the deformation of the surrounding parts where the pulling wire is located, the operation is more laborious

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