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Uniform refrigeration freezing balloon catheter

A balloon catheter, uniform technology, applied in the direction of catheters, cooling surgical instruments, surgical instrument parts, etc., can solve the problems of large axial outer profile, increased processing difficulty, raw material loss, and limited freezing range, etc., to achieve The effect of reducing raw material cost and processing operation cost, small rigidity, and large cooling range

Inactive Publication Date: 2020-11-06
上海玮启医疗器械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this structure also has certain limitations. The end of the tube 25 of the fluid injection element (at the helical structure) is too rigid, and the axial outer profile section profile is relatively large, which increases the processing difficulty of the product itself and the loss of raw materials, and the freezing range still limited

Method used

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  • Uniform refrigeration freezing balloon catheter
  • Uniform refrigeration freezing balloon catheter
  • Uniform refrigeration freezing balloon catheter

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Experimental program
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Effect test

Embodiment 1

[0026] Such as image 3 , Figure 4 As shown, in the frozen balloon involved in the present invention, its fluid injection element tube 37 adopts a single-circle winding structure, and the injection hole 3 located on the surface of the fluid injection element tube single-circle structure is parallel to the central axis of the single-circle structure. It is directional within 180° axial range. This design makes the refrigerant no longer limited to the same direction when it enters the cryoballoon through the injection hole 3 of the fluid injection element, increases the freezing range of the cryoballoon, and realizes the three parts of the cryoballoon wall 8, that is, the front half of the cryoballoon. The total cooling of the ball also makes the fluid injection element less rigid and the axial outer profile smaller, which reduces the cost of raw materials and processing operations.

Embodiment 2

[0028] Such as Figure 5 , Figure 6 As shown, the injection hole on the fluid injection element tube 3 7 can also adopt a rectangular opening 9 rectangular structure, and the long side is consistent with the axial direction. This injection hole structure can increase the injection range of the refrigerant in the axial direction, and realize the effect of total cooling of the front hemisphere.

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PUM

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Abstract

The invention relates to a uniform refrigeration freezing balloon catheter, and belongs to the technical field of a medical appliance. The uniform refrigeration freezing balloon catheter comprises a tubular fluid injection element tube, wherein a freezing balloon covering the tail end of the fluid injection element tube is arranged on the outer periphery of the tail end of the fluid injection element tube; the tail end of a tube body of the fluid injection element tube is provided with a single circle structure around the tube body of the fluid injection element tube; and injection holes withthe spraying range reaching the inner surface of the freezing balloon are formed in the semicircular arc-shaped tube wall of the outer side of the fluid injection element tube of the single circle structure. The fluid injection element tube in the uniform refrigeration freezing balloon catheter uses single-circle type winding; and the injection holes have certain directionality on the single-circle structure. Compared with an existing product, the uniform refrigeration freezing balloon catheter has the advantages that in modes of changing the length, shape, area and the like of the injection holes, the freezing range of the freezing balloon wall is expanded; and through the design of the single-circle structure, the rigidity of the fluid injection element tube is smaller, the axial outer contour is smaller, and the raw material cost and the processing and operation cost of the product are reduced.

Description

technical field [0001] The invention relates to a freezing balloon catheter with uniform cooling, which belongs to the technical field of medical devices. Background technique [0002] In the process of clinically using cryoballoon technology to isolate pulmonary veins to treat atrial fibrillation, it is necessary to form irreversible ablation lesions at the pulmonary vein ostium through cryoablation, so that abnormal electrical signals in the pulmonary veins cannot be transmitted to the left atrium. In order to completely isolate the abnormal electrical signal conduction between the pulmonary vein and the left atrium, the ablation lesion formed in the pulmonary vein needs to be a continuous transmural ablation lesion around the inner wall of the pulmonary vein. However, currently in the process of cryoablation of pulmonary veins, since the bonding state between the balloon and the inner wall of the pulmonary vein cannot be accurately known, the doctor can only judge the bon...

Claims

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Application Information

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IPC IPC(8): A61B18/02
CPCA61B18/02A61B2018/0022A61B2018/00285A61B2018/00404A61B2018/0212
Inventor 张晨朝王越王君毅时玉楠程瑞王国辉
Owner 上海玮启医疗器械有限公司