An easy-to-manipulate delivery system for intervening heart valves

Abstract

The invention discloses a conveying system for interventional heart valves with a convenient control function. The conveying system comprises a core pipe assembly, an outer sheathing pipe, a handle and a floating limiting strip, wherein a first control mechanism and a second control mechanism are arranged along the axial direction of the handle and are used for respectively adjusting the axial positions of the outer sheathing pipe and the core pipe assembly; a guide head and a fixed head are arranged on the core pipe assembly, the guide head is fixed at the far end of the core pipe assembly, the near end of the core pipe assembly extends out of the fixed head, and an interventional heart valve installation position is formed between the guide head and the fixed head; the near end of the floating limiting strip is used as a starting end which is fixed corresponding to the fixed head or the core pipe assembly; the floating limiting strip is floated between the interventional heart valveinstallation position and the outer sheathing pipe; the outer wall of the fixed head is provided with a positioning part which is matched with a connecting lug of the interventional heart valve; the far end of a middle layer of the outer sheathing pipe is of a hollow structure, the hollow structure comprises at least two hollow units, and the adjacent two hollow units are mutually separated at thecircumferential far end of a first section.

Description

technical field [0001] The invention relates to the field of medical devices, and more particularly, the invention relates to a delivery system 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

[0008] The slow speed control part of the existing handle, by turning the threaded knob located at the tail of the proximal end of the handle, drives the retraction of the outer sheath tube, the thread rotation stroke is short, and with the twists and turns of the human blood vessels, it is difficult to transmit the rotating torque to the delivery system. The distal end, which causes the surgeon to need more force to turn the knob in order to retract the outer sheath during surgery

[0009] Existing outer sheath tubes used to deliver interventional heart valves are mostly made of polymer materials. Although polymer materials have good properties and performance, their elasticity and strength are poor.

At present, although there are also methods of applying reinforcing materials to polymer materials, such as braided mesh tubes or elastic tubes for reinforcement, polymer materials are coated on the inside and outside of the reinforcing tube to form an outer sheath tube, but the above measures only increase The bending resistance and pressure-bearing properties of the outer sheath have not obviously solved the problems that the interventional heart valve is difficult to recover and the outer sheath is wrinkled when the outer sheath is retracted to the interventional heart valve

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