| CPC A61F 2/2418 (2013.01) [A61F 2/2427 (2013.01); A61F 2/2433 (2013.01); A61F 2220/0016 (2013.01)] | 7 Claims |
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1. An implantation device for a surgical valve, configured to implant a surgical valve, wherein the surgical valve comprises a valve body and an expandable stent; wherein the valve body comprises a valve base and a valve frame disposed on the valve base; and the expandable stent is of a cylindrical structure with openings at a first end and a second end of the expandable stent, the first end of the expandable stent is sleeved on the valve base, the expandable stent is provided with a plurality of insertion hooks configured to be inserted into a native valve annulus and disposed along a periphery of the first end of the expandable stent, and the second end of the expandable stent is configured to be radially expanded so as to be supported on one side of the native valve annulus;
the implantation device for the surgical valve comprises a fixing member and an expanding structure, wherein the fixing member is a tubular structure and configured to detachably penetrate the valve body, and the expanding structure is configured to pass through the valve body to be located within the expandable stent and is configured to radially expand the second end of the expandable stent to a preset position;
wherein the expanding structure comprises a push-pull member, and a plurality of telescopic arms disposed along a periphery of the push-pull member;
the push-pull member penetrates through the fixing member and is movable relative to the fixing member in an axial direction of the fixing member;
each of a first end and a second end of the push-pull member extends out of the fixing member;
each of the plurality of telescopic arms comprises a first arm and a second arm which are rotatably connected to each other, an end of the first arm facing away from the second arm is rotatably connected to the first end of the push-pull member, and an end of the second arm facing away from the first arm is rotatably connected to the fixing member;
wherein the second arm has a side surface facing away from the push-pull member, the side surface of the second arm is concave and comprises a first area and a second area which are positioned at an obtuse angle to each other, a boundary line between the first area and the second area is substantially perpendicular to a length direction of the push-pull member;
when the second end of the push-pull member moves in a direction further away from the fixing member, a distance between the push-pull member and a joint of the first arm and the second arm increases;
wherein the push-pull member is a square column, and the fixing member is of a square cylindrical structure;
wherein the push-pull member is a stepped shaft, a first stepped surface facing the second end of the push-pull member is disposed along a periphery of the push-pull member, a stepped hole is disposed along an axial direction of the fixing member, a second stepped surface facing the first end of the push-pull member is disposed along a periphery of the stepped hole, and the first stepped surface and the second stepped surface are configured to limit a position of the push-pull member;
wherein the stepped shaft comprises a first portion and a second portion located closer to the first end of the push-pull member than the first portion, a cross-sectional area of the first portion is larger than a cross-sectional area of the second portion, and the first stepped surface is formed between the first portion and the second portion;
wherein the stepped hole comprises a first hole and a second hole located father from the first end of the push-pull member than the first hole, a cross-sectional area of the first hole is larger than a cross-sectional area of the second hole, the second stepped surface is formed between the first hole and the second hole.
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