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Multi-electrode basket catheter and preparation method thereof

A multi-electrode and mesh basket technology, which is applied in the field of catheters for mapping and ablation and its preparation, can solve the problems of blue electrode distortion and inability to accurately and quickly map, and achieve the effect of easy retrieval

Active Publication Date: 2016-04-27
APT MEDICAL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, changes in the size and geometry of the human heart will affect the contact between the blue electrode and myocardial tissue, and can also distort the blue electrode, resulting in inability to accurately and quickly map or perform radiofrequency ablation

Method used

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  • Multi-electrode basket catheter and preparation method thereof
  • Multi-electrode basket catheter and preparation method thereof
  • Multi-electrode basket catheter and preparation method thereof

Examples

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preparation example Construction

[0078] The preparation method of the multi-electrode basket catheter of the present invention adopts the following steps:

[0079] 1. Make each part

[0080] 1. To make the strip arm 33, use the 35-type extruder of Dongguan Sheng'an Plastic Machinery Co., Ltd., set the screw speed at 23n / min, the barrel pressure at 4100Mpa, and the traction speed at 70m / s. Polyurethane, block polyamide or Nylon is extruded into a strip-shaped arm to obtain a strip-shaped arm 33 with an outer diameter of 0.4 to 1.1 mm, an inner diameter of 0.3 to 0.9 mm, and a length of 45 to 80 mm. Platinum or platinum-iridium alloy tubes are used to cut ring electrodes 34 , if used for mapping, the width of the ring electrodes 34 is 0.5 to 2 mm, and if used for radiofrequency ablation, the width of the ring electrodes 34 is 4 to 8 mm. The spacing between the ring electrodes 34 is 1 to 20 mm, and the spacing is larger than the width of the ring electrodes 34 . The spacing between the ring electrodes 34 is eq...

Embodiment 1

[0101] Embodiment 1, the basket is composed of 8 strip arms, the maximum outer diameter of the net basket is 42mm, the outer diameter of the strip arms is 0.7mm, and the length is 70mm, and the PEBAX material is used. Eight ring electrodes are distributed on the outer surface of each strip arm, the width of the ring electrodes is 0.6 mm, and the distance between the ring electrodes is 5 mm at equal intervals.

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Abstract

The invention discloses a multi-electrode basket catheter and a manufacture method of the multi-electrode basket catheter to solve the technical problem of accurately and rapidly conducting mapping or radio frequency ablation treatment in the operation process. The multi-electrode basket catheter comprises a basket device. A basket of the basket device is composed of strip-shaped arms. The near end of each strip-shaped arm and the far end of the strip-shaped arm are connected to a near end connecting structure and a far end connecting structure. The strip-shaped arms are bent under the action of external force to form an arc shape or form a spatial curve so that the basket of an ellipsoid shape can be defined. The strip-shaped arms are stretched out or drawn back in the length direction of the strip-shaped arms under the action of external force to form a stranded wire. Annular electrodes are distributed on the outer surfaces of the strip-shaped electrodes. The manufacture method of the multi-electrode basket catheter includes the steps of manufacturing all parts and assembling the parts. Compared with the prior art, the multi-electrode basket catheter has the advantages that the size of the basket formed by the strip-shaped arms can be adjusted under the control of one handle, and therefore the electrodes distributed in the space on the strip-shaped arms make full and close contact with the tissue of the endocardium, mapping or radio frequency ablation treatment is accurately and rapidly conducted, and the basket is conveniently recycled.

Description

technical field [0001] The invention relates to a medical device and a preparation method thereof, in particular to a catheter used for guiding, mapping and ablation of treatment and a preparation method thereof. Background technique [0002] The diagnostic mapping catheter is a key component for recording the electrophysiological signals of various parts of the heart, electrically stimulating the heart, and performing electrophysiological mapping of heart diseases. Radiofrequency ablation lead catheters are used for electrophysiological mapping of cardiac arrhythmias, temporary cardiac pacing and radiofrequency ablation. This method of treatment not only avoids the pain of chest surgery, but also cures the disease without leaving any serious complications. It is widely used in temporary beds at home and abroad. Atrial fibrillation (AF) is a common cardiac arrhythmia in clinical practice. In 1997, Haissaguerre, France, used ablation of pulmonary veins for the first time to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B18/12A61B5/04
Inventor 成正辉韩永贵
Owner APT MEDICAL INC
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