A device for measuring mechanical distribution of a self-expanding valve stent

Abstract

This invention discloses a device for measuring the mechanical distribution of a self-expanding valvular stent, comprising a hollow container for accommodating the self-expanding valvular stent, a piston, and a pressure pump. The hollow container has several through holes for fixing the piston. The piston includes a piston rod, a piston chamber, and a pressure measuring device. The piston chamber is filled with liquid. One end of the piston rod can seal the piston chamber and move relative to it within the chamber. The pressure measuring device detects the liquid pressure within the piston chamber. The end of the piston away from the piston rod extends outside the hollow container and is connected to the pressure pump. Due to the influence of different pressures, the self-expanding valvular stent will exhibit different morphologies at various points, allowing for the determination of the pressure exerted by the stent on surrounding substances under different compression states. This helps to accurately understand the post-implantation condition of the self-expanding valvular stent.

Description

Technical Field

[0001] This invention relates to the field of valve stent technology, and more specifically to a device for measuring the mechanical distribution of a self-expanding valve stent. Background Technology

[0002] For patients with symptomatic aortic stenosis, transcatheter aortic valve replacement is a safe and feasible treatment option compared to surgery, regardless of the risks of surgery.

[0003] Due to the close anatomical relationship between the cardiac conduction system and the aortic root, conduction block requiring pacemaker implantation remains a major complication after transcatheter aortic valve replacement (TAVR). The occurrence of postoperative conduction block is closely related to the compression of surrounding tissues by the valve stent after implantation. Estimating the magnitude of this pressure on surrounding tissues after replacement is crucial for predicting postoperative pacemakers and for future research and development of new valves.

[0004] Currently, there are no relevant technical means to measure the magnitude of the force exerted by different parts of the valve frame on surrounding tissues after aortic valve replacement surgery. Summary of the Invention

[0005] The purpose of this invention is to provide a device that can measure the magnitude of the force exerted by a valve stent on surrounding materials under different morphologies, making it convenient to observe the morphology of the valve stent in the device, thus overcoming the current situation where there are no relevant technical means to measure the magnitude of the force exerted by different parts of the valve stent on surrounding tissues.

[0006] The technical solution of the present invention includes:

[0007] A device for measuring the mechanical distribution of a self-expanding valvular stent includes a hollow container for accommodating the self-expanding valvular stent, a piston, and a pressure pump; the hollow container has a plurality of through holes distributed thereon, the through holes being able to fix the piston; the piston includes a piston rod, a piston chamber, and a pressure measuring device, the piston chamber being filled with liquid, one end of the piston rod being able to close the piston chamber and be able to move relative to it within the piston chamber, and the pressure measuring device being able to detect the liquid pressure within the piston chamber;

[0008] When the piston is connected to the hollow container through the through hole, the end of the piston rod away from the piston chamber points to the central axis or center point of the hollow container, and the end of the piston away from the piston rod extends outside the hollow container and is connected to the pressure pump.

[0009] Preferably, the end of the piston chamber away from the piston rod is connected to a T-shaped pipe, one end of which is connected to a pressure measuring device and the other end is connected to a pressure pump.

[0010] Preferably, the hollow container is a hollow cylinder, and / or the through hole is a circular hole.

[0011] Preferably, the device further includes a fixing bracket, which makes the top and bottom surfaces of the hollow cylinder perpendicular to the ground.

[0012] Preferably, the hollow container, the fixed support, and the piston are all made of non-metallic materials and are not visible under X-rays.

[0013] Preferably, the hollow container includes several parallel sets of through-hole rings, with equal spacing between through holes in each set of through-hole rings, and any adjacent through-hole rings are arranged alternately.

[0014] Preferably, the end of the piston rod away from the piston chamber is a pointed rod with a groove at the end, which can be fixed at the intersection with the self-expanding valve stent.

[0015] Preferably, the pressure pump includes several pressure connection sections, each pressure connection section is connected to a piston, and the pressure of each pressure connection section can be set independently.

[0016] Preferably, the hollow container is provided with a movable door, and one side of the movable door is connected to the hollow container by a movable shaft.

[0017] The movable door can be opened and closed by rotating along the axis.

[0018] Preferably, it also includes a heater for heating the liquid filled into the hollow container.

[0019] The present invention has the following advantages: The device provided by the present invention for measuring the mechanical distribution of a self-expanding valve stent is simple to manufacture, the internal pressure of the piston is controllable, and theoretically it can simulate any shape after implantation; in some specific embodiments, the main structure of the device is made of non-metallic materials, and its use under X-ray fluoroscopy does not interfere with the acquisition of valve stent images. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the device for measuring the mechanical distribution of a self-expanding valve stent according to the present invention;

[0021] Figure 2 This is a schematic vertical cross-sectional view of the device for measuring the mechanical distribution of a self-expanding valve stent according to the present invention.

[0022] Figure 3 This is a schematic diagram of the piston structure described in this invention;

[0023] Reference numerals: 100 - hollow container, 200 - fixed bracket, 300 - self-expanding valve stent, 400 - heater, 101 - movable door, 102 - through hole, 103 - piston, 1031 - piston rod, 1032 - piston chamber, 104 - tee pipe, 105 - pressure measuring device, 106 - pressure pump, 201 - column, 202 - base. Detailed Implementation

[0024] To make the technical problems solved, the technical solutions, and the beneficial effects of the present invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0025] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] like Figure 1 As shown, a device for measuring the mechanical distribution of a self-expanding valvular stent includes a hollow container 100 for accommodating the self-expanding valvular stent 300, a piston 103, and a pressure pump 106. The hollow container 100 has several through holes 102, which can fix the piston 103. The piston 103 includes a piston rod 1031, a piston chamber 1032, and a pressure measuring device 105. The piston chamber 1032 is filled with liquid. One end of the piston rod 1031 can close the piston chamber 1032 and can move relative to it within the piston chamber. The pressure measuring device 105 can detect the liquid pressure within the piston chamber.

[0027] When piston 103 is connected to hollow container 100 through through hole 102, the end of piston rod 1031 away from piston chamber points to the central axis or center point of hollow container 100, and the end of piston away from piston rod extends to the outside of hollow container and is connected to pressure pump 106.

[0028] In some specific embodiments of the present invention, such as Figure 1 As shown, the hollow container 100 is a hollow cylinder, and the through hole 102 is a circular hole.

[0029] The device also includes a fixing bracket 200, which makes the top and bottom surfaces of the hollow container 100 perpendicular to the ground.

[0030] The hollow container 100, the fixed support 200, and the piston 103 are all made of non-metallic materials and are not visible under X-rays.

[0031] like Figure 1 As shown, the hollow container 100 is provided with a movable door 101. One side of the movable door 101 is connected to the hollow container 100 by a movable shaft, and the movable door can be rotated to open and close along the axis. A heater 400 is also included, which can heat the liquid filled into the hollow container.

[0032] like Figure 1 , Figure 2 As shown, the hollow container 100 includes several sets of parallel through-hole rings, with the through holes 102 in each set of through-hole rings being equally spaced, and any adjacent through-hole rings being arranged alternately.

[0033] In some specific embodiments of the present invention, such as Figure 1 As shown, taking the minimally invasive VitaFlow aortic valve (valve size 27) as an example, the length of the cylinder can be set to about 15cm and the inner diameter to about 10cm. Taking the midpoint of the cylinder as a line, extending to both ends, a total of 7 rings of small holes are set, each hole with a diameter of 4mm. Each ring of small holes surrounds the cylinder, with the spacing evenly distributed. The first to sixth rings are staggered, with 12 holes in each ring, and the seventh ring has 6 holes. The distance between the first and third rings is 11mm, the second ring is located at the midpoint, the fourth ring is 11mm from the second ring, the fifth ring is 13mm from the third ring, the sixth ring is 17mm from the fourth ring, and the seventh ring is 18mm from the fifth ring (depending on the spacing of the cross points of different valve models).

[0034] like Figure 2 , Figure 3 As shown, the end of the piston rod 1031 away from the piston chamber 1032 is a pointed rod with a groove at the end, which can be fixed at the intersection with the self-expanding valve stent 300.

[0035] like Figure 3 As shown, the piston chamber 1032 is connected to a three-way pipe 104 at the end away from the piston rod. One end of the three-way pipe 104 is connected to the pressure measuring device 105, and the other end is connected to the pressure pump 106.

[0036] like Figure 3 As shown, the pressure pump 106 includes several pressure connection sections, each of which is connected to a piston 103, and the pressure of each pressure connection section can be set independently.

[0037] When detected, such as Figure 2 As shown, the self-expanding valve stent 300 is placed in the center of the hollow container 100, coaxial with the hollow container, and fixed to the center of the cylinder by the intersection of the piston rods 1031 around it. Different pressures are applied to the piston chamber 1032 by the pressure pump 106, and then act on the self-expanding valve stent 300 through the end of the piston rods 1031. Due to the different pressures, the self-expanding valve stent 300 will exhibit different morphologies at various points. X-rays are used to record the morphological characteristics to obtain the pressure exerted by the self-expanding valve stent on the surrounding material under different compression states, simulating the situation after implantation.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An apparatus for measuring the mechanical profile of a self-expanding valve stent, characterized by, Includes a hollow container, piston, and pressure pump for housing a self-expanding valvular stent; The hollow container has several through holes, which can be used to fix the piston. The piston includes a piston rod, a piston chamber, and a pressure measuring device. The piston chamber is filled with liquid. One end of the piston rod can close the piston chamber and can move relative to the piston chamber. The pressure measuring device can detect the liquid pressure in the piston chamber. When the piston is connected to the hollow container through the through hole, the end of the piston rod away from the piston chamber points to the central axis or center point of the hollow container, and the end of the piston away from the piston rod extends to the outside of the hollow container and is connected to the pressure pump. The piston rod is pointed at the end away from the piston chamber, with a groove at the end, which can be fixed at the intersection with the self-expanding valve stent.

2. The device for measuring the mechanical distribution of a self-expanding valve stent of claim 1, wherein, The piston chamber is connected to a T-junction at the end furthest from the piston rod. One end of the T-junction is connected to a pressure measuring device, and the other end is connected to a pressure pump.

3. The device for measuring the mechanical distribution of a self-expanding valvular stent according to claim 1, characterized in that, The hollow container is a hollow cylinder, and / or the through hole is a circular hole.

4. The device for measuring the mechanical distribution of a self-expanding valvular stent according to claim 3, characterized in that, The device also includes a fixed support, which makes the top and bottom surfaces of the hollow cylinder perpendicular to the ground.

5. The apparatus for measuring the mechanical distribution of a self-expanding valve stent according to claim 4, characterized in that, The hollow container, fixed support, and piston are all made of non-metallic materials and are not visible under X-rays.

6. The apparatus for measuring the mechanical distribution of a self-expanding valve stent according to claim 1, characterized in that, The hollow container includes several parallel sets of through-hole rings, with equal spacing between the through holes in each set of through-hole rings, and any adjacent through-hole rings are arranged alternately.

7. The apparatus for measuring the mechanical distribution of a self-expanding valvular stent according to claim 1, characterized in that, The pressure pump includes several pressure connection sections, each of which is connected to a piston, and the pressure of each pressure connection section can be set independently.

8. The apparatus for measuring the mechanical distribution of a self-expanding valvular stent according to claim 1, characterized in that, The device also includes a heater for heating the liquid filled into the hollow container.

Images