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A three-dimensional helical intracranial thrombectomy bracket

A three-dimensional helical and embolized stent technology, applied in the field of medical devices, can solve the problems of long time thrombectomy, difficult operation, and high emboli escape probability, and achieve high thrombectomy success rate, good release and recovery, and good thrombus embedding. Effect

Active Publication Date: 2021-12-17
SHANGHAI HEARTCARE MEDICAL TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also some problems at the same time, such as poor thrombectomy ability and time-consuming thrombus removal; high probability of emboli escape and difficulty in thrombus removal; few developing points make it difficult to release and observe the stent; insufficient support of the stent, large and hard emboli Difficult to embed; the bracket has poor ability to capture small plugs and small hardness plugs; poor release and recovery performance, difficult operation; poor bending performance of the bracket itself, etc.

Method used

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  • A three-dimensional helical intracranial thrombectomy bracket
  • A three-dimensional helical intracranial thrombectomy bracket

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. The three helices use nickel-titanium wire, and the maximum stretching length of each helix is ​​the same;

[0033] 2. Multiple helix structures are combined in coaxial space, the number is 3, the outer diameter of each helix is ​​different, the diameter of the outermost helix is ​​7mm, and the diameter of the innermost helix is ​​3mm;

[0034] 3. The helical body rotates in the same direction;

[0035] 4. The wire diameter of the spiral body is 0.1mm, and the wire diameter of each spiral body can be the same;

[0036] 5. The two ends of each spiral body are welded to the center point of the coaxial;

[0037] 6. The length of the whole spirochete is L50mm;

[0038] 7. The most distal end 8 of the entire helix has a conical structure with a small pitch and a high density;

[0039] 8. There are developing rings or developing filaments at both ends of the whole spirochete;

[0040] 9. The proximal end 7 of the spirochete is connected to the delivery guide wire;

Embodiment 2

[0042] 1. The four helices use nickel-titanium wire, and the maximum stretching length of each helix is ​​the same;

[0043] 2. Multiple helicoid structures are combined in coaxial space, the number is 4, the outer diameter of each helix is ​​different, the diameter of the outermost helix is ​​6mm, and the diameter of the innermost helix is ​​2mm;

[0044] 3. The rotation direction of the innermost helix is ​​opposite to that of other helices;

[0045] 4. The wire diameter of the spiral body is 0.05mm, and the wire diameter of each spiral body is the same;

[0046] 5. The two ends of each spiral body are welded to the center point of the coaxial;

[0047] 6. The length of the whole spirochete is L40mm;

[0048] 7. The most distal end 8 of the entire helix has a conical structure with a small pitch and a high density;

[0049] 8. There are developing rings or developing filaments at both ends of the whole spirochete;

[0050] 9. The proximal end 7 of the spirochete is conne...

Embodiment 3

[0052] 1.3 helicoids use nickel-titanium wire;

[0053] 2. Multiple helix structures are combined in coaxial space, the number is 3, the outer diameter of each helix is ​​different, the diameter of the outermost helix is ​​5mm, and the diameter of the innermost helix is ​​0.5mm;

[0054] 3. The helical body rotates in the same direction;

[0055] 4. The maximum stretch length of the innermost spiral body is longer than that of other spiral bodies;

[0056] 4. The wire diameter of the spiral body is 0.01mm, and the wire diameter of each spiral body is the same;

[0057] 5. The two ends of each spiral body are welded to the center point of the coaxial;

[0058] 6. The length of the whole spiral body is L60mm;

[0059] 7. The most distal end 8 of the entire helix has a conical structure with a small pitch and a high density;

[0060] 8. There are developing rings or developing filaments at both ends of the whole spirochete;

[0061] 9. The proximal end 7 of the spirochete is c...

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Abstract

The invention relates to a three-dimensional spiral intracranial thrombectomy bracket, which belongs to the technical field of medical devices. It includes a spiral body, a conveying guide wire, a developing ring, a center point 1 and a center point 2; the thrombectomy bracket is provided with filamentary spiral bodies of different diameters that are set in sequence according to their diameters, and the central axes of the spiral bodies are coincident; one end of the filamentous spiral body is connected to the spiral body The center point 1 is provided on the central axis, and is connected with the conveying guide wire through the center point 1, and the other end of the filamentary spiral body is connected to the center point 2 provided on the central axis of the spiral body; the center point is provided with a developing ring. The bolus retrieval bracket of the present invention provides a three-dimensional helical bracket with high thrombus retrieval success rate, strong bolt grasping ability, easy release and recovery, and high safety by changing the bracket space structure and bracket form. The success rate of mechanical thrombectomy.

Description

technical field [0001] The invention relates to a three-dimensional helical intracranial thrombectomy bracket, which belongs to the technical field of medical instruments. Background technique [0002] The current treatment methods for thrombosis in stroke include drug thrombolysis and surgical thrombectomy; the effective window period of drug thrombolysis is short, and there are many complications after recovery; surgical mechanical thrombectomy device may achieve rapid and complete vascular recanalization. However, there are also some problems at the same time, such as poor thrombectomy ability and time-consuming thrombus removal; high probability of emboli escape and difficulty in thrombus removal; few developing points make it difficult to release and observe the stent; insufficient support of the stent, large and hard emboli Difficult to embed; the bracket has poor ability to capture small plugs and small hardness plugs; poor release and recovery performance, difficult ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/22
CPCA61B17/22A61B2017/22038A61B2017/22094
Inventor 朱宽王震李志刚王国辉张坤张晨朝刘锦
Owner SHANGHAI HEARTCARE MEDICAL TECH CORP LTD
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