Portable valve conveying system with head end capable of being bent

Abstract

The system comprises a sheath tube and a traction wire, an expansion section is arranged at the head end of the sheath tube, a traction wire inlet is formed in the tube wall, close to the expansion section, of the sheath tube, a traction wire outlet is formed in the tube wall of the tail end of the sheath tube, one end of the traction wire is fixed outside the expansion section, and the other end of the traction wire is fixed outside the expansion section. The other end of the traction wire penetrates into the sheathing canal from the traction wire inlet and then penetrates out of the sheathing canal from the traction wire outlet, and the traction wire outlet is provided with a fixator capable of locking the traction wire. The head end can be bent conveniently to adjust the coaxiality of the conveying system, so that the valve release coaxiality and release stability are guaranteed, valve displacement and perivalvular leakage are reduced, valve release is optimized, and meanwhile tension-free valve crossing of the conveying system is facilitated.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a convenient valve delivery system with an adjustable head end. Background technique [0002] At present, transcatheter aortic valve replacement (TAVR) has been widely used in patients with severe aortic stenosis, becoming an equally important method as surgical thoracotomy, and TAVR technology is less invasive and patients recover faster. [0003] When performing TAVR surgery, a guide wire track needs to be established first, and then the tip of the sheath is transported along the guide wire to the aorta. figure 1 As shown, the head end of the sheath tube 100 punctured through the femoral artery needs to be bent into the aortic valve. Since the curved sheath tube 100 has an outward tension, the head end of the sheath tube 100 is attached to the inner wall outside the aorta, As a result, the valve is implanted in a different axis, resulting in valve displacement, and the...

AI Technical Summary

Problems solved by technology

[0003] When performing TAVR surgery, it is necessary to establish a guide wire track first, and then transport the head end of the sheath along the guide wire to the aorta, such as figure 1 As shown, the head end of the sheath tube 100 punctured through the femoral artery needs to be bent to enter the aortic valve. Since the curved sheath tube 100 has an outward tension, the head end of the sheath tube 100 is attached to the inner wall outside the aorta. As a result, the valve implantation is out of axis, resulting in valve displacement, high incidence of paravalvular leakage, and the need to implant a second valve

At the same time, it is necessary to rely on the delivery system to forcefully push the valve system across the valve, which may make it difficult to cross the valve and even lead to aortic valve dissection

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