Valve leaflet cutting device
A valve leaflet and cutting part technology, which is applied in the field of valve leaflet dividing devices and systems, can solve the problems of complex positioning and cutting structure, unsatisfactory valve leaflet segmentation effect, inconvenience of targeted cutting of unilateral valve leaflets, etc., and achieves a simple positioning structure. , Precise cutting, accurate positioning effect
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Embodiment 1
[0058] Such as figure 1 and figure 2 As shown, the present embodiment provides a valve leaflet segmentation device, comprising: a push tube 10; a first fixing piece 11 and a second fixing piece 12, the proximal ends of which are all fixed to the distal end of the pushing tube 10; the first fixing piece 11 and the distal end of the second fixing member 12 are away from the extension direction of the push tube 10 in a natural state; the cutting catheter 20 is slidably arranged in the pushing tube 10; the distal end of the cutting catheter 20 has a cutting portion, and the cutting portion includes a cutting Electrode 21, in order to be able to energize, the metal part of cutting electrode 21 is exposed; The distal end of cutting part is away from the extension direction of cutting catheter 20 in a natural state; Inner tube 30 is slidably arranged in cutting catheter 20; Limiting end 31 , disposed at the distal end of the inner tube 30 ; the limiting end 31 has a limiting hole 3...
Embodiment 2
[0061] This embodiment is a preferred scheme based on embodiment 1, such as image 3 and Figure 4 As shown, the first fixing part 11 and the second fixing part 12 are arranged along the axial direction of the push tube 10, wherein the second fixing part 12 is located at the opposite distal end. The first fixing part 11 and the second fixing part 12 are made of elastic material, such as shape memory material. And the second fixing part 12 can be close to the inner tube 30 under the action of external force; when the distal end of the second fixing part 12 is inserted into the limiting hole 32, the second fixing part 12 is limited to spring up. When in use, the first fixing part 11 is located at the upper part of the leaflet 80 , and after the position is adjusted, the second fixing part 12 is separated from the limiting hole 32 and restored to its original shape by elastic force, and is located at the lower part of the leaflet 80 .
[0062] When the inner tube 30 slides dist...
Embodiment 3
[0078] Such as Figures 11 to 13 As shown, the difference from Example 2 is that the present embodiment is preferred. The stent graft 13 is a funnel structure arranged on the push tube 10, and the funnel structure is arranged near the proximal side of the first fixing member 11. 13 is set as a funnel structure, and the stretched area of the stent graft 13 becomes smaller during use, which avoids excessive support to blood vessels. Since the valve leaflet 80 is divided in the direction of the first fixing member 11, the stent graft 13 also has a good ability to capture shed particles.
[0079] Preferably, the length of the open end of the stent-graft 13 is greater than the length of the first through-slot 111 , so as to ensure that all exfoliated objects passing through the first through-slot 111 can be captured to the stent-graft 13 .
[0080] Preferably, the edge of the opening end of the stent-graft 13 is fixedly connected with the first fixing part 11 , so that the trapp...
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