A postcava embolism filter
A filter and vena cava technology, which is applied in the field of medical devices, can solve the problems of being easily hugged with the inner wall of the blood vessel, and the embolization of the filter is difficult to recover, and achieves the effects of increasing stability, increasing the contact area, and facilitating recovery
Pending Publication Date: 2019-01-15
李雷
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Problems solved by technology
Most of the existing embolic filters have an umbrella-shaped structure. In order to ensure the stability of the embolic filter in the blood vessel during implantation and in vivo, the structure of the embolic filter is usually designed to increase its contact area with the inner wall of the blood vessel. At the same time, the device There is a barbed structure to prevent displacement, but after this design, the part of the embolic filter in contact with the inner wall of the blood vessel is easy to hug the inner wall of the blood vessel, that is, the embolic filter is closely attached to the inner wall of the blood vessel, thereby improving the recovery of the embolic filter cause difficulty
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[0026] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.
[0027] In the present disclosure, unless stated to the contrary, the used orientation words such as "upper", "lower", "top", and "bottom" are generally defined based on the orientation or positional relationship shown in the drawings, Specifically, refer to figure 1 The directions shown in the drawings, while "inside" and "outside" refer to the inside and outside of the corresponding component outline. In addition, the terms "first", "second", and the like used in the present disclosure are for distinguishing one element from another, and do not have sequence or importance. When the following description refers to the accompanying drawings, the same numeral...
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The invention relates to a postcava embolism filter, including a support frame, wherein the support frame has a straight portion and a bent portion extending from one side of the straight portion toward the central axis, the end of the bent portion is formed with a connection structure capable of being connected to an external guide wire, the other side of the straight portion is gradually broughtcloser to the central concave from the edge to form an edge protrusion arranged around the central axis, the center of the edge protrusion is provided with a recovering member, and the support framehas an implanted state in which the recovering member is axially located in the edge protrusion and the straight portion is in contact with the blood vessel wall, and a recovered state in which the recovering member is axially located outside the edge protrusion and the straight portion is disengaged from the blood vessel wall. Thus, the filter is attached to the blood vessel wall in the implantedstate, thereby increasing the stability of the embolism filter, and in the recovered state, the linear portion can be separated from the blood vessel wall, thereby reducing friction with the blood vessel wall and facilitating recovery.
Description
technical field [0001] The present disclosure relates to the technical field of medical devices, in particular to an inferior vena cava embolic filter. Background technique [0002] In order to prevent the embolic substances in the inferior vena cava blood from moving freely in the blood vessels and entering the pulmonary arteries, thereby causing pulmonary embolism, an embolic filter is usually placed in the blood vessels to filter the active embolic substances and prevent them from entering the pulmonary artery system. After the risk of pulmonary embolism is eliminated, the embolism filter is recycled. Most of the existing embolic filters have an umbrella-shaped structure. In order to ensure the stability of the embolic filter in the blood vessel during implantation and in vivo, the structure of the embolic filter is usually designed to increase its contact area with the inner wall of the blood vessel. At the same time, the device There is a barbed structure to prevent di...
Claims
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IPC IPC(8): A61F2/01
CPCA61F2/01A61F2002/016A61F2/011
Inventor 李华钧
Owner 李雷