Endocardium three-dimension navigation system and navigation method

Abstract

The present invention discloses an endocardial three-dimensional guide system and guide method. Said system includes excitation device, three pairs of excitation electrodes, catheter position signal obtaining device, respiratory impedance regulating device and cardiac chambers mechanical external form synchronization device. Said excitation device contains digital control logic and constant-current generation module. The above-mentioned catheter position signal obtaining device includes catheter, positioning amplifier, A / D converter, digital demodulator and coordinate converter. Said respiratory impedance regulating device includes body surface electric field signal collecting circuit, positioning amplifier, A / D converter, respiratory data extraction module and respiratory correction module.

Description

technical field [0001] The invention relates to an operation navigation system, in particular to a catheter navigation system in the catheter intervention operation of the Department of Cardiology. Background technique [0002] In cardiology catheter interventional surgery, it is necessary to navigate the catheter through navigation technology. The catheter navigation technology is briefly described as follows: a three-dimensional cardiac cavity model is constructed by obtaining the position signal of the catheter on the endocardium, and the signal position of the catheter is observed on the three-dimensional cardiac cavity model to obtain the actual position of the catheter on the endocardium. The doctor's operation during the operation. [0003] The existing three-dimensional endocardial navigation method generally includes the following steps: three pairs of excitation electrodes with orthogonal spatial positions are placed on the body surface, and the excitation electro...

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Problems solved by technology

The disadvantages of this application are: (a) for the processing technology of respiratory waves, a time-division system is used to collect respiratory waveform data. Since the excitation and collection must be carried out between mutually non-orthogonal electrode pairs in the same plane, the electrodes that can be collected The combination mode is limited, so the extracted breathing-related information is not rich enough, and the circuit structure is complicated; (b) a linear weighting method is used to compensate the influence of the breathing waveform, the model is simple, and the calculation error is large; (c) the form of current pulse is used External excitation is generated, which is easily affected by the contact capacitance of the electrode system, and the accuracy of the collected respiratory wave data processing algorithm is limited

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