Flexible epicardium electrocardio-electrode chip and preparation method thereof

Abstract

Disclosed are a flexible epicardial ECG electrode chip and a preparation method thereof, wherein the electrode chip comprises a flexible base, an electrode unit, an electrode lead, a lead connection point and an insulating layer, with the electrode unit, the electrode lead and the lead connection point all being arranged on the flexible base to achieve an electrical connection therebetween, the insulating layer being arranged on the flexible base and covering the electrode lead, and the electrode unit and the lead connection point not being provided with an insulating layer on the surfaces thereof. The above-mentioned electrode chip is an electrode array formed by arranging a plurality of electrode units, which chip has a minimum spatial resolution on a micron scale, a good softness and deformability, and can be attached to the surface of the heart and adapted to the change of the heart surface profile, which may both guarantee the electrode and a target area on the surface of the heart to form a good attachment and effectively avoid damage, such as extrusion, scratches and the like, caused by the electrode during a cardiac motion. The electrode chip can be used to qualitatively diagnose a heart disease and precisely position a lesion, providing an objective basis for a targeted treatment.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a flexible epicardial electrocardiographic electrode chip. Background technique [0002] Routine ECG examination uses electrodes placed at 9 positions including hands, feet, and chest to obtain macroscopic body surface ECG signals and analyze them to determine heart disease. However, due to the asymmetry, irregularity, and non-uniformity of body tissues, the electrical signals generated by the heart have attenuation, distortion, and filtering effects in the process of being transmitted to the outside of the body. In addition, the electrocardiographic signal on the body surface is significantly different from the potential distribution on the heart surface in amplitude and phase, and many electrophysiological events may not necessarily be observed on the body surface. If multiple activation points appear in the myocardium at the same time, the superposition of multiple maps will ...

AI Technical Summary

Problems solved by technology

However, limited by the performance of the material itself, the polyimide film cannot be stretched and folded, and the local strain tolerance is less than 1%.

Even if the flexibility of the microelectrode array can be improved by continuously reducing the thickness of the polyimide film, this increases the difficulty of electrode processing. Due to the constraints of the process, the processing size of the electrode has to be increased, resulting in the resolution of the electrode. In addition, the thickness of the polyimide substrate is reduced, which also reduces the mechanical strength and operability of the microelectrode array.

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