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Thrombus extraction support with net bag structure

A technology with a net and a net cage, used in medical science, surgery, etc., can solve the problems of missing, severe, and difficult to remove thrombus fragments, saving processing time and processing costs, high metal coverage, and improving connection. the effect of strength

Pending Publication Date: 2021-10-22
EASYCESS MEDICAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, (1) the means of thrombolysis require a relatively short time interval from the occurrence of embolism to medical treatment, and the effect of drug thrombolysis is not good if the time is too long; It is necessary to select a suitable catheter in advance; when the method of (3) captures the thrombus, some thrombus fragments may slip off, and the fragmented small thrombus will run to a narrower position with the blood flow, causing more harmful, more difficult to remove hazards
As for (3) the removal of the thrombectomy stent, although the thrombectomy effect is good, and there are many domestic and foreign enterprises, doctors, scholars, and medical-industrial R&D teams in the existing technology to continuously improve this method, but currently , there is still an urgent problem to be solved, that is, how to better prevent thrombus fragments from missing and running to the distal blood vessel when removing the thrombus
If this problem is not actively resolved, the process of thrombus removal and stent removal may cause greater risks

Method used

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  • Thrombus extraction support with net bag structure
  • Thrombus extraction support with net bag structure
  • Thrombus extraction support with net bag structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] see Figure 2-4 The mesh cage 10 is cylindrical, has a reference blood flow direction is a first end near the distal end and a reference blood flow direction is a second end near the proximal end, and the mesh cage is from the second end to the first end. Between the ends, the drawing section 102, the catching section 101 and the braiding tail section 103 are defined in sequence. The cage is composed of a plurality of grid units 12 arranged axially. Specifically, the capture section 101 is formed by cutting, and the braided tail section 103 is formed by weaving. The number of the wrapping wires can be one, or α of course, forming the wrapping combination 20 , where the preferred value of α is 4, 8, 16 or 32. For each winding wire, its two ends are respectively connected to the two ends of the braiding tail section 103 correspondingly, and each winding wire extends in a spiral shape. Of course, as a more preferred embodiment, all grid units 12 can be divided into mult...

Embodiment 3

[0055] Embodiment 3 may also include several modified examples:

[0056] Variation 1, see Figure 11A , Figure 11B , the combined connection structure includes a connecting sleeve 26, and an extension rod at one end of the capture section 101 in the distal direction; the extension rod has a ball head 211, and the ball head and the connecting sleeve 26 The inner wall presses against and clamps the winding wire. In Modification 1, the minimum thickness of the gap is defined as P, the diameter of the ball head is defined as D1, the inner diameter of the ring is defined as D2, the diameter of the winding wire is defined as D3, and the minimum width of the extension rod is defined is H; and the quantitative relationship satisfies the inequality group:

[0057]

[0058] On the basis of embodiment three, the following improvements are modification two: see Figure 12A , Figure 12B , the combined connection structure includes a connecting sleeve 26, and an extension rod at o...

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Abstract

The invention discloses a thrombus extraction support with a net bag structure. The thrombus extraction support comprises but not limited to a net cage and winding wires. The net cage is cylindrical and is provided with a first end portion close to the far end with reference to the blood flow direction and a second end portion close to the near end with reference to the blood flow direction, and the portion, between the second end portion and the first end portion, of the net cage is sequentially defined as a traction section, a capturing section and a weaving tail section. The net cage is composed of a plurality of grid units arranged in the axial direction. The tail section of the net cage comprises N converging rods. The thrombus extraction support with the net bag structure further comprises an annular piece, and a gap allowing the winding wires to penetrate through is formed between the penetrating convergence rod and the annular piece. The penetrating convergence rod is in sliding fit with the winding wires, and the inner wall of the annular piece is connected with all the winding wires in an internally tangent mode. One end, close to the near-end direction of the weaving tail section, of each winding wire or multiple winding wires is fixedly connected with one end, close to the far-end direction of the capturing section through a combined connecting structure.

Description

technical field [0001] The invention belongs to the field of interventional medical devices, in particular to a thrombectomy bracket with a net structure. Background technique [0002] The neurointerventional treatment process requires the use of interventional medical devices to remove the thrombus embedded in the intracranial blood vessels. Among them, the existing methods include but are not limited to (1) thrombolysis; (2) suction catheter removal; Tie bracket cleared. However, (1) the means of thrombolysis require a relatively short time interval from the occurrence of embolism to medical treatment, and the effect of drug thrombolysis is not good if the time is too long; It is necessary to select a suitable catheter in advance; when the method of (3) captures the thrombus, some thrombus fragments may slip off, and the fragmented small thrombus will run to a narrower position with the blood flow, causing more harmful, More difficult to take out the danger. As for (3) ...

Claims

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Application Information

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IPC IPC(8): A61B17/221
CPCA61B17/221A61B2017/00867A61B2017/2212A61B2017/22094
Inventor 王昂刘子杰
Owner EASYCESS MEDICAL LTD