An electrophysiological catheter with pressure sensing

Abstract

The invention discloses an electrophysiological catheter with a pressure sensing function. By the electrophysiological catheter, temperatures can be compensated according to temperature changes in theapplication, zero temperature drifts of contact pressure measurements can be remarkably eliminated, measuring errors can be reduced, the stability of the contact pressure measurements can be improved, and the production cost of the electrophysiological catheter can be reduced. The electrophysiological catheter comprises a head electrode, a second electrode, a pressure sensor, a catheter body, a handle, a connector and an internal circuit board. The head electrode, the second electrode and the pressure sensor are sequentially arranged at the front end of the catheter body. The catheter body isinserted into the human body from the outside, and the rear end of the catheter body is connected with the handle to facilitate holding. The connector is arranged at the tail end of the handle, and is constructed as a data and power combined interface to be connected with a radio frequency energy source, a power source and a data transmission interface. The internal circuit board is arranged in the handle, is provided with a pressure detecting circuit to receive signals of the pressure sensor, and is also provided with a micro processing unit to acquire pressure data according to the signalsof the pressure sensor.

Description

technical field [0001] The invention relates to the technical field of radiofrequency ablation medical equipment, in particular to an electrophysiological catheter with pressure sensing. Background technique [0002] Arrhythmias are most commonly caused by abnormal routing of electrical signals in the endocardial tissue near the new atria or ventricles. Radiofrequency ablation sends radiofrequency (RF) energy through an ablation catheter to act on the lesion to form damage. The significance of the damage is to block the path of abnormal electrical activity, so as to treat the arrhythmia. The success of the operation depends on the location of the ablation site in the heart and the depth of the lesion. The contact between the ablation catheter and the tissue is critical for lesion formation. When the contact force is small, the ablation lesion is shallow and cannot effectively block the path of abnormal electrical activity. When the contact pressure is high, there is a ris...

AI Technical Summary

Problems solved by technology

The optimized sensor, circuit compensation, software compensation of detection temperature, etc. used in the prior art not only increase the complexity of the preparation process, but also are expensive, and cannot completely remove the measurement error caused by temperature.

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