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Embolus redirector and conveying device thereof

A technology of steering gear and emboli, which is applied in the field of medical devices, can solve problems such as emboli escape, inaccurate device positioning, and complicated device operation process, so as to improve the turning rate of emboli, reduce the risk of stroke, and reduce the complexity Effect

Pending Publication Date: 2020-11-10
SHANGHAI MICROPORT SHIELD MEDTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (1) The three blood vessels on the side wall of the aortic arch are not completely covered;
[0010] (2) The device has poor adherence to the wall and emboli escape;
[0011] (3) The positioning of the device is inaccurate, the coverage area is small, and the area of ​​the side branch blood vessel opening cannot be completely covered;
[0012] (4) The operation process of the device is complicated;
[0013] (5) The device occupies too much space in the aorta, which hinders the subsequent operation of the device

Method used

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  • Embolus redirector and conveying device thereof
  • Embolus redirector and conveying device thereof
  • Embolus redirector and conveying device thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0054] figure 1 Shown is a schematic diagram of the basic aortic arch related to this embodiment. Three larger arteries emanate from the convex side of the arch, which are divided into brachiocephalic artery, left common carotid artery, and left subclavian artery from right to left. The emboli diverter and its delivery device provided in the embodiment can place the emboli diverter in the ascending aorta and / or the aortic arch and / or the descending aorta before and during transcatheter surgery that may cause embolism, and serve as a filter head. Brachial artery, left common carotid artery, and left subclavian artery ascending blood flow can prevent thrombus B generated during the operation from entering the brain and avoid stroke.

[0055] figure 2 The schematic diagram of the emboli diverter and its delivery device provided in this embodiment, the emboli diverter and its delivery device includes an emboli diverter 10, a pusher rod 20, an introduction sheath 30, the emboli d...

Embodiment 2

[0076] The technical solution of this embodiment and embodiment 1 is substantially the same, and its difference is:

[0077] The support frame of the embolic diverter 10 is composed of a bottom frame 101 and a plurality of inner frames, the number of the inner frames is greater than or equal to 2, and the plurality of inner frames are set in the same direction as the bottom frame 101, and the bottom frames The distance between the proximal vertices and the distal vertices is greater than the distance between the proximal vertices and the distal vertices of the inner frame, and the distances between the proximal vertices and the far vertices of multiple inner frames gradually decrease along the direction away from the bottom frame 101 .

Embodiment 3

[0079] The technical solution of this embodiment and embodiment 1 is substantially the same, and its difference is:

[0080] The embolus diverter is a double-layer elliptical structure in a naturally unfolded state, and the inner frame and both ends of the bottom frame of the embolus diverter are designed with a third ring 103 as a connection point, such as Figure 7 As shown, it is convenient to connect the inner frame, the bottom frame, the push rod and the first wire of the embolic diverter.

[0081] The push rod is connected to the distal end of the inner frame of the emboli diverter, and the distal end of the push rod is pre-bent to form a third hook, and the curvature radius of the third hook is usually an aortic arch-shaped radius of curvature. The push rod supports the highest point of the filter, and the push rod runs through the entire inner frame. This design is more conducive to the fit of the filter to the three blood vessels on the wall of the aortic arch. Vascu...

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Abstract

The invention discloses an embolus redirector and a conveying device thereof. The device comprises an embolus redirector body, wherein the embolus redirector body is connected with a push rod, and iscompressed in an import sheath pipe; the embolus redirector body comprises a supporting frame and a filter screen; the supporting frame comprises a bottom layer frame and one or more inner layer frames, wherein the bottom layer frame and the inner layer frames are arranged in a spacing manner from low position to high position, and the distance between the near-end top point and the far-end top point of the bottom layer frame is larger than that between the near-end top points and the far-end top points of the inner layer frames; and the filter screen is arranged outside the supporting frame and forms an arch structure. The embolus redirector is good in overall adherence, can cover three blood vessels on the side wall of an aortic arch, can increase the steering rate of embolus, reduces embolus escape, and reduces the risk of stroke caused by the fact that the embolus flows to brain blood vessels.

Description

technical field [0001] The present invention relates to a medical device for preventing vascular embolism during surgery, and more particularly to a device for cerebrovascular protection by collecting or diverting embolic debris during cardiac surgery and / or aortic surgery device. Background technique [0002] Some procedures involving the heart and aorta, such as cardiac surgery, cardiopulmonary bypass, catheter-based interventional cardiac surgery, and ascending aortic surgery, may result in the formation of platelet aggregates (e.g., thrombus, grease droplets, Bacterial clots and / or other foreign bodies, tumor cells, or other small pieces of tissue) or atherosclerotic debris and debris broken off from the arterial wall, these materials are carried along the bloodstream into the blood circulation of the brain and other important systemic arteries system, becoming a substance that occludes blood vessels. Embolic substances entering the blood circulation of the brain can b...

Claims

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Application Information

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IPC IPC(8): A61F2/01
CPCA61F2/01A61F2002/016A61F2250/0067
Inventor 倪尊张李爽孙剑峰陈宇芬金巧蓉
Owner SHANGHAI MICROPORT SHIELD MEDTECH CO LTD
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