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Terminal electrode and its assembly method with electrophysiological catheter

A terminal electrode and electrophysiological technology, which is applied in the field of assembly of terminal electrodes and electrophysiological catheters, can solve the problems of insufficient temperature sensors, insufficient heat transfer effect of stainless steel, and complicated processing steps, so as to reduce the use of precious metals, Simple processing and short temperature sensing distance

Active Publication Date: 2016-04-13
SHANGHAI MICROPORT EP MEDTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The terminal electrode of this composite structure needs to process the inner core and the outer shell of metal separately. Although the consumption of precious metals is saved, the processing steps are complicated. In addition, the temperature control hole is opened on the inner core. Since the heat transfer effect of stainless steel is not as good as that of platinum , and the composite structure will prevent the temperature sensor from being sufficiently close to the outer surface of the terminal electrode, resulting in slow or inaccurate temperature sensing

Method used

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  • Terminal electrode and its assembly method with electrophysiological catheter
  • Terminal electrode and its assembly method with electrophysiological catheter
  • Terminal electrode and its assembly method with electrophysiological catheter

Examples

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example 1

[0044] image 3 A and image 3 B respectively shows a perspective view and a cross-sectional view of the structure of a terminal electrode according to an embodiment of the present invention. In order to perform a performance comparison with a conventional terminal electrode of a comparable size, the terminal electrode according to an embodiment of the present invention may be manufactured to have the same appearance size as that of the conventional terminal electrode in Comparative Example 1. Specifically, from the appearance, the terminal electrode according to one embodiment of the present invention is the same as the traditional terminal electrode, having two parts: a hemispherical distal end 6 and a cylindrical main body 7, and the diameter of the terminal electrode is 2.3 mm, the total length is 4mm. Please note that these external dimensions are only set for exemplary performance comparison with traditional terminal electrodes and are not limiting, and the external di...

example 2

[0050] Figure 4 A schematic diagram showing the assembly of the terminal electrode and the electrophysiological catheter according to one embodiment of the present invention (that is, Example 1). As is generally known, the catheter lumen of the electrophysiological catheter is provided with a wire 13 for transmitting electrocardiographic signals and radio frequency energy signals, a temperature sensor 15 for sensing temperature, and a pull wire 14 for changing the shape of the catheter . The distal end of the electrophysiological catheter is provided with a stepped portion 12 , the stepped portion 12 is 3 mm long and 1.3 mm in diameter, which is slightly smaller than the inner diameter of the lumen (namely hole 10 ) of the terminal electrode in Example 1. Preferably, the stepped portion is elastic in the radial direction. More preferably, the outer diameter of the stepped portion is slightly smaller than the inner diameter of the cavity, so that the effective portion of the...

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Abstract

The invention provides a terminal electrode and a method for assembling the terminal electrode and an electrophysiology catheter. A lead, a temperature sensor and a stay wire are arranged in a catheter cavity of the electrophysiology catheter; a near-side end of the terminal electrode is opened to form a cavity, and a step part arranged at a far-side end of the electrophysiology catheter is inserted and adhered in the cavity; a far-side end of the lead and an effective part of the temperature sensor penetrate through holes formed in the side wall of the step part; the inner side wall of the cavity is used for fixing the far-side end of the lead and is used for fixing the effective part of the temperature sensor between the inner side wall and the step part to enable the effective part to tightly contact the inner side wall. The invention also provides a method for assembling the terminal electrode and an electrophysiology catheter.

Description

technical field [0001] The invention relates to a terminal electrode and an assembly method thereof with an electrophysiological catheter. Background technique [0002] Arrhythmias occur when the origin and conduction pathways of cardiac excitation are altered. Arrhythmia can seriously endanger the health of patients. Catheter radiofrequency ablation has become the standard procedure for the treatment of various cardiac arrhythmias. Catheter radiofrequency ablation is performed by percutaneously puncturing an electrophysiology catheter equipped with various series of electrodes to feed its electrodes into appropriate locations within the heart, such that the tip electrode at its distal end and the diffusion electrode on the patient's back A circuit is formed, and the radiofrequency energy emitted by the radiofrequency ablation device is transmitted to the closely attached myocardial tissue through the terminal electrode, causing it to dehydrate and coagulate and lose its e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B18/14
Inventor 郭俊敏杨谦谦梁波史胜风郭小静孙毅勇陈高峰罗七一
Owner SHANGHAI MICROPORT EP MEDTECH CO LTD