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Thrombectomy bracket and thrombectomy device

A technology of support rods and grid units, which is applied in the field of medical devices, can solve problems such as poor capture of thrombus, broken and escaped thrombus, and poor bending and wall-attachment performance, so as to achieve good bending and wall-attachment performance, reduce collapse, and prevent extrusion broken effect

Active Publication Date: 2022-06-28
山东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 bracket and thrombectomy device
  • Thrombectomy bracket and thrombectomy device
  • Thrombectomy bracket and thrombectomy device

Examples

Experimental program
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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 the introduction 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the blood vessel 70 through the introduction sheath; After the embolization position is set, the microcatheter 50 is withdrawn, the thrombectomy stent is released to the deployed state, and captures the thrombus m; finally, the microcatheter 50 and the thrombectomy stent are withdrawn, thereby taking out...

Embodiment 2

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

[0117] The number of the first net pockets 2221 is 6, and the 6 first net pockets 2221 are arranged in sequence along the circumferential direction. This arrangement helps to further improve the limiting and blocking effect of the first net pockets 2221 on the thrombus m in the accommodating cavity 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 the first embodiment 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 the first embodiment, the pores of the cylindrical section 221 are larger than those of the conical section 21. On the basis that the thrombus m can enter the accommodating cavity 40 through the pores of the cylindrical section 221, The tapered section 21 can achieve 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 the radial support force of the tapered section 21; The wire diameter of the segment 221 is larger than the wire diameter of the tapered segment 21, so setting in this way can make the grid unit 20 have a relatively uniform radial support force on the basis of s...

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Abstract

This application is applicable to the technical field of medical devices, and provides a thrombectomy bracket and a thrombectomy device. The thrombectomy device includes a thrombus retrieval bracket. The thrombus retrieval bracket includes a delivery guide wire, a support rod, and at least two A grid unit, the grid unit includes a conical segment and a main body segment connected in sequence along a preset direction, the conical top of the conical segment is connected to the support rod, the conical bottom of the conical segment is connected to the main body; the conical segment The pores are smaller than at least part of the pores of the main body segment; any two adjacent grid units along the preset direction are the first grid unit and the second grid unit in turn, and at least part of the tapered section of the second grid unit is located at the second grid unit It is inside the main body section of a grid unit, and is enclosed with the tapered section and the main body section of the first grid unit to form an accommodating cavity. Such arrangement enables the thrombus retrieval stent to have better bending and wall-adhering performance, so as to prevent the thrombus from being squeezed and crushed when the thrombus retrieval stent bends and collapses, and can reduce the escape of the thrombus.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/221A61F2/90A61F2/95
CPCA61B17/221A61F2/90A61F2/95A61B2017/2212A61B2017/22038A61F2250/0098
Inventor 俞华沣吴潭钱彤彤
Owner 山东创微医疗科技有限公司