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Thrombectomy stent and thrombectomy device

A technology of support rods and grid cells, applied in the field of medical devices, can solve the problems of thrombus breaking and escaping, poor bending and adhering performance, and inability to capture thrombus, so as to reduce collapse, prevent extrusion and breakage, and better adhere to the wall. performance effect

Active Publication Date: 2022-05-13
深圳市华和创微医疗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the embodiment of the present application is to provide a thrombus retrieval bracket and a thrombus retrieval device, aiming to solve the technical problems in the prior art that the thrombus is not firmly captured by the thrombus retrieval bracket and the poor performance of bending and sticking leads to the thrombus breaking and escaping

Method used

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  • Thrombectomy stent and thrombectomy device
  • Thrombectomy stent and thrombectomy device
  • Thrombectomy stent and thrombectomy device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Please also refer to Figure 2 to Figure 6 , The thrombectomy device provided in the embodiment of the present application includes a thrombectomy stent and an introduction sheath, and the introduction sheath is configured to introduce the thrombectomy stent into the blood vessel 70; wherein, the thrombectomy stent has a compressed configuration and an expanded configuration; The stent can cooperate with the microcatheter 50 and introduce the sheath to perform thrombectomy. Specifically, during thrombectomy, the thrombectomy stent is pressed into the microcatheter 50 and is in a compressed state, and the microcatheter 50 and the thrombectomy stent are introduced into the blood vessel 70 through the introduction sheath; After the embolization position is reached, the microcatheter 50 is withdrawn, and the thrombus retrieval stent is released into an unfolded state, and the thrombus m is captured; finally, the microcatheter 50 and the thrombus retrieval stent are withdraw...

Embodiment 2

[0116] see Figure 9 , the difference between this embodiment and Embodiment 1 is:

[0117] The number of the first net pockets 2221 is 6, and the six first net pockets 2221 are arranged sequentially along the circumferential direction. Such arrangement helps to further improve the position-limiting blocking effect of the first net pockets 2221 on the thrombus m in the accommodating chamber 40, Thereby further reducing the escape of thrombus m.

[0118] Specifically, according to actual usage requirements, the number of the first net pockets 2221 can also be set to two, four, five or even more.

[0119] The rest of this embodiment is the same as that of Embodiment 1, and the features not explained in this embodiment are explained in Embodiment 1, and will not be repeated here.

Embodiment 3

[0121] Please also refer to Figure 10 and Figure 11 , the difference between this embodiment and Embodiment 1 is:

[0122] The wire diameter of the cylindrical section 221 is larger than the wire diameter of the tapered section 21 .

[0123] It should be noted here that, based on the design of Embodiment 1, the pores of the cylindrical section 221 are larger than the pores of the tapered section 21, and on the basis that the thrombus m can enter the accommodating cavity 40 through the pores of the cylindrical section 221, The conical section 21 can realize the effect of limiting and blocking the thrombus m. This design will inevitably make the radial support force of the cylindrical section 221 smaller than that of the conical section 21; and in this embodiment, the cylindrical section 221 The wire diameter of the section 221 is larger than the wire diameter of the tapered section 21, so set, on the basis of satisfying the pore design of the cylindrical section 221 and the...

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Abstract

The invention is suitable for the technical field of medical instruments, and provides a thrombectomy stent and a thrombectomy device.The thrombectomy device comprises the thrombectomy stent, the thrombectomy stent comprises a conveying guide wire, a supporting rod and at least two grid units which are sequentially distributed at intervals in the preset direction, and each grid unit comprises a conical section and a main body section which are sequentially connected in the preset direction; the cone top position of the conical section is connected to the supporting rod, and the cone bottom position of the conical section is connected to the main body section; pores of the conical section are smaller than at least part of pores of the main body section; any two adjacent grid units in the preset direction are a first grid unit and a second grid unit in sequence, at least part of the conical section of the second grid unit is located in the main body section of the first grid unit, and a containing cavity is defined by the conical section of the second grid unit and the main body section of the first grid unit. By means of the arrangement, the thrombus extraction support has the good bending and wall attaching performance, thrombus is prevented from being squeezed and broken when the thrombus extraction support is bent and collapsed, and escape of the thrombus can be reduced.

Description

technical field [0001] The application belongs to the technical field of medical devices, and more specifically relates to a thrombectomy bracket and a thrombectomy device. Background technique [0002] Acute ischemic stroke (acute ischemic stroke, AIS, commonly known as cerebral infarction) is the nerve tissue damage caused by ischemic necrosis of local brain tissue caused by sudden blockage of blood flow in the brain. The main diseases that cause death and disability, especially acute stroke caused by large vessel occlusion, are often dangerous, with high mortality and disability rates, and will cause the greatest harm to patients ; Once a stroke occurs, it will cause a heavy burden to the patient himself, his family and the society. [0003] At present, the thrombus removal device is a medical tool used to capture thrombus in blood vessels to achieve blood vessel recanalization, which can better realize the treatment of acute ischemic stroke; The thrombus retrieval sten...

Claims

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Application Information

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IPC IPC(8): A61B17/221A61F2/90A61F2/95
CPCA61B17/221A61F2/90A61F2/95A61B2017/2212A61B2017/22038A61F2250/0098
Inventor 俞华沣吴潭钱彤彤
Owner 深圳市华和创微医疗科技有限公司