Impedance detection and evaluation system for ablation catheter

Abstract

Provided is an impedance detection and evaluation system for an ablation catheter, comprising an ablation catheter monitoring module, an ablation data acquisition module, an ablation data analysis module, an impedance detection and evaluation module, an ablation catheter feedback and adjustment module, and an ablation catheter management module. The modules are connected by means of network ports. The ablation catheter monitoring module acquires impedance data, pressure data, and optical data between a catheter electrode and a tissue in real time by means of a remote monitoring device. The ablation data acquisition module collects data from the ablation catheter monitoring module. The ablation data analysis module analyzes the collected data in real time to evaluate the ablation effect and the attachment state. The impedance detection and evaluation module further evaluates impedance detection analysis results. The ablation catheter feedback and adjustment module automatically adjusts the position or working parameters of the catheter according to evaluation results. The ablation catheter management module manages and optimizes the entire monitoring module to form an internal circulation.

Description

An impedance detection and evaluation system for ablation catheters Technical Field

[0001] This invention relates to the field of bioengineering technology, specifically to an impedance detection and evaluation system for ablation catheters. Background Technology

[0002] In existing ablation catheter techniques, while the adhesion between the catheter electrode and the tissue is crucial to the ablation effect, there is currently a lack of effective real-time monitoring methods to accurately assess this adhesion. Good tissue adhesion not only increases the depth of the ablation lesion, thereby increasing the possibility of achieving pulmonary vein isolation, but also effectively avoids air bubble formation and reduces the risk of air embolism. However, existing detection methods mostly rely on pressure sensors, which are usually installed at the catheter tip and cannot comprehensively monitor the adhesion status of all parts of the catheter electrode. Furthermore, the installation location of these sensors is limited, potentially leading to an overly rigid catheter tip that affects its passage through complex blood vessels. Therefore, developing an impedance detection and assessment system capable of real-time monitoring of the adhesion between the catheter electrode and the tissue is of great significance for improving the success rate and safety of ablation procedures. Technical issues

[0003] To address the shortcomings of existing technologies, this invention provides an impedance detection and evaluation system for ablation catheters, which has the advantage of providing an effective real-time monitoring method to accurately assess the degree of contact, thus solving the problem of the lack of an effective real-time monitoring method to accurately assess this degree of contact in existing ablation catheter technologies. Technical solutions

[0004] To achieve the above objectives, the present invention provides the following technical solution: an impedance detection and evaluation system for an ablation catheter, comprising an ablation catheter monitoring module, an ablation data acquisition module, an ablation data analysis module, an impedance detection and evaluation module, an ablation catheter feedback adjustment module, and an ablation catheter management module, wherein the modules are connected through a network port;

[0005] The ablation catheter monitoring module collects impedance data, pressure data, and optical data between the catheter electrode and the tissue in real time through a remote monitoring device.

[0006] The ablation data acquisition module collects data from the ablation catheter monitoring module and performs preliminary processing, including cleaning, uniform formatting, and numbering.

[0007] The ablation data analysis module analyzes the collected data in real time to evaluate the ablation effect and adhesion status;

[0008] The impedance detection and evaluation module further evaluates the impedance detection and analysis results;

[0009] The ablation catheter feedback adjustment module automatically adjusts the position or operating parameters of the catheter based on the evaluation results.

[0010] The ablation catheter management module manages and optimizes the entire monitoring module, forming an internal loop.

[0011] Preferably, the ablation data acquisition module includes an impedance detection data acquisition unit, a pressure change data acquisition unit, and an optical monitoring data acquisition unit. The impedance detection data acquisition unit is used to measure the impedance value between the catheter electrode and the tissue to determine the contact status. The pressure change data acquisition unit uses a fiber optic sensor or a microelectrode array to monitor the pressure changes of various parts of the catheter in real time. The optical monitoring data acquisition unit uses optical measurement data from a remote monitoring device to assist in determining the contact status. The impedance detection data acquisition unit, the pressure change data acquisition unit, and the optical monitoring data acquisition unit are connected to the ablation data analysis module through a network port.

[0012] Preferably, the impedance detection data acquisition unit acquires impedance detection data through a remote monitoring device and numbers it; the impedance detection data numbering is as follows: , , ... .

[0013] Preferably, the pressure change data acquisition unit acquires pressure change data through a remote monitoring device and numbers it; the pressure change data numbering is as follows: , , ... .

[0014] Preferably, the optical monitoring data acquisition unit acquires optical monitoring data through a remote monitoring device and numbers it. The optical monitoring data includes the intensity of the OCT signal, and the intensity of the OCT signal is numbered as follows: .

[0015] Preferably, the ablation data analysis module includes a contact degree assessment unit, an ablation effect assessment unit, and an accuracy assessment unit.

[0016] Preferably, the contact degree evaluation unit calculates the contact state based on impedance detection data. The calculation formula is as follows:

[0017]

[0018] In the formula, Indicates the fit state. , , ... This represents impedance measurement data. Indicates the number of tests. Indicates the first Each impedance measurement data, Indicates the preset threshold. This indicates the preset warning value.

[0019] Preferably, the ablation effect evaluation unit calculates the pressure stability index based on pressure change data. The calculation formula is as follows:

[0020]

[0021] In the formula, , , ... This represents data on pressure changes. Indicates the first Individual pressure change data, Indicates the number of measurements.

[0022] Preferably, the accuracy assessment unit calculates the tissue damage depth based on optical monitoring data. And according to the depth of tissue damage Determine the ablation effect The calculation formula is as follows:

[0023]

[0024]

[0025] In the formula, Indicates the ablation effect. Indicates the depth of tissue damage. Indicates the strength of the OCT signal. and It is a constant. This represents the set of expected ablation depth values.

[0026] Preferably, the impedance detection and evaluation module is based on the bonding state. Assess the fit to determine the quality of adhesion between the catheter electrode and the tissue in the current detection mode;

[0027] The impedance detection and evaluation module is based on the pressure stability index. To evaluate the stability of the ablation catheter under the current detection mode;

[0028] The impedance detection and evaluation module is based on the ablation effect. The assessment is used to determine whether the depth of tissue damage under the current detection mode meets the expected results. Beneficial effects

[0029] Compared with the prior art, the present invention provides an impedance detection and evaluation system for ablation catheters, which has the following advantages:

[0030] 1. This invention calculates the bonding state. The impedance detection and evaluation module is based on the bonding state. The adhesion status is assessed to determine the quality of the catheter electrode's contact with the tissue under the current detection mode. The calculation formula, combined with historical data, provides the system with preset thresholds and preset warning values. When the calculated adhesion status value is lower than the preset threshold, it indicates that the catheter electrode is in good contact with the tissue and ablation can be performed. When the adhesion status value is higher than the preset warning value, it indicates poor contact, requiring adjustment of the catheter position or re-attachment to ensure ablation effect and safety. Therefore, the above calculation and analysis process can monitor the contact status between the catheter electrode and the tissue in real time, ensuring the stability of the ablation catheter during the operation, thereby improving the safety of the operation and increasing the success rate.

[0031] 2. This invention calculates the pressure stability index. This allows the system to monitor and adjust pressure changes in real time during the ablation process, ensuring good contact between the catheter and the tissue and stable energy transfer, thereby improving the safety and effectiveness of the procedure.

[0032] 3. This invention calculates the depth of tissue damage. And according to the depth of tissue damage Determine the ablation effect The impedance detection and evaluation module in the system evaluates the ablation effect. The evaluation is used to determine whether the tissue damage depth under the current detection mode meets the expected results, by calculating the tissue damage depth. Set of expected ablation depth values Comparison, when the depth of tissue damage Belongs to the set of expected ablation depth values When the tissue damage is deep enough, the ablation effect is considered effective. Not part of the set of expected ablation depth values If the ablation effect is not achieved, the ablation effect is considered ineffective. The ablation catheter feedback adjustment module then automatically adjusts the catheter position based on the evaluation results of the impedance detection and evaluation module. The sampling frequency, signal gain, and data processing algorithm parameters of the remote monitoring device are monitored and optimized by the ablation catheter management module, making the system judgment more efficient and accurate. This solves the problem of the lack of effective real-time monitoring methods to accurately evaluate the degree of fit in existing ablation catheter technologies. Attached Figure Description

[0033] Figure 1 is a schematic diagram of the structure of the present invention. Embodiments of the present invention

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please refer to Figure 1. An impedance detection and evaluation system for an ablation catheter includes an ablation catheter monitoring module, an ablation data acquisition module, an ablation data analysis module, an impedance detection and evaluation module, an ablation catheter feedback adjustment module, and an ablation catheter management module. The modules are connected through a network port.

[0036] The ablation catheter monitoring module collects impedance data, pressure data, and optical data between the catheter electrode and the tissue in real time through remote monitoring equipment;

[0037] The remote monitoring device utilizes the principle of electromagnetic induction for remote monitoring. It generates an alternating electromagnetic field around the catheter electrode. When the electrode comes into contact with the tissue, the conductivity of the tissue affects the distribution and intensity of the electromagnetic field, thereby changing the impedance value at both ends of the electrode. The device remotely assesses the degree of contact between the catheter electrode and the tissue by monitoring these impedance changes in real time, without the need to install sensors on the catheter. This avoids the problems of limited sensor installation location and affecting catheter passage. The device is also equipped with optical analysis functions, which acquire optical measurement data of the tissue through the optical port on the catheter, such as optical coherence tomography (OCT) signals. Combined with impedance monitoring data and optical characteristics, it can more comprehensively and accurately assess the degree of contact and ablation effect.

[0038] The ablation data acquisition module collects data from the ablation catheter monitoring module and performs preliminary processing, including cleaning, uniform formatting, and numbering.

[0039] The ablation data analysis module performs real-time analysis on the collected data to evaluate the ablation effect and adhesion status.

[0040] The impedance detection evaluation module further evaluates the impedance detection analysis results to ensure their accuracy;

[0041] The ablation catheter feedback adjustment module automatically adjusts the catheter position or operating parameters based on the evaluation results;

[0042] The ablation catheter management module manages and optimizes the entire monitoring module, forming an internal loop.

[0043] The ablation data acquisition module includes an impedance detection data acquisition unit, a pressure change data acquisition unit, and an optical monitoring data acquisition unit;

[0044] The impedance detection data acquisition unit is used to measure the impedance value between the catheter electrode and the tissue to determine the contact status.

[0045] The pressure change data acquisition unit uses fiber optic sensors or microelectrode arrays to monitor pressure changes in various parts of the catheter in real time.

[0046] The optical monitoring data acquisition unit uses optical measurement data from remote monitoring equipment to help determine the contact status. The impedance detection data acquisition unit, pressure change data acquisition unit, and optical monitoring data acquisition unit are connected to the ablation data analysis module via a network port.

[0047] The impedance detection data acquisition unit acquires impedance detection data through remote monitoring equipment and assigns numbers to it. The impedance detection data is numbered as follows: , , ... .

[0048] The pressure change data acquisition unit acquires pressure change data through remote monitoring equipment and assigns numbers to it. The pressure change data is numbered as follows: , , ... .

[0049] The optical monitoring data acquisition unit acquires optical monitoring data through remote monitoring equipment and assigns numbers to it. The optical monitoring data includes the intensity of the OCT signal, and the OCT signal intensity is numbered as follows: .

[0050] The ablation data analysis module includes a contact degree assessment unit, an ablation effect assessment unit, and an accuracy assessment unit.

[0051] The contact degree assessment unit analyzes the relationship between impedance value and contact state, sets preset thresholds and preset warning values ​​based on historical data, and calculates the contact state based on impedance detection data. The calculation formula is as follows:

[0052]

[0053] In the formula, Indicates the fit state. , , ... This represents impedance measurement data. Indicates the number of tests. Indicates the first Each impedance measurement data, Indicates the preset threshold. This indicates the preset warning value.

[0054] By calculating the bonding state The impedance detection and evaluation module is based on the bonding state. The adhesion status is evaluated to determine the adhesion quality between the catheter electrode and the tissue in the current detection mode. When the calculated adhesion status value is lower than the preset threshold, it means that the catheter electrode and the tissue are well adhered and ablation can be performed. When the adhesion status value is higher than the preset warning value, it means that the adhesion is poor and the catheter position needs to be adjusted or re-adhered to ensure ablation effect and safety.

[0055] The advantage is that it calculates the fit. It can monitor the adhesion between the catheter electrode and the tissue in real time, ensuring the stability and effectiveness of the ablation catheter during the operation, thereby improving the safety and success rate of the operation.

[0056] The ablation effect evaluation unit calculates the pressure stability index based on pressure change data. The calculation formula is as follows:

[0057]

[0058] In the formula, , , ... This represents data on pressure changes. Indicates the first Individual pressure change data, Indicates the number of measurements.

[0059] By calculating the pressure stability index Wj, the impedance detection and evaluation module assesses the stability of the ablation catheter under the current detection mode. The pressure stability index Wj reflects the change in the pressure between the catheter and the tissue during the ablation process. When the pressure stability index Wj is low, it indicates that the catheter can maintain good stability during the ablation process and can effectively transfer ablation energy to the target tissue, thereby improving the ablation effect and the success rate of the operation. When the pressure stability index Wj is high, the system will automatically prompt that there are unstable factors in the ablation process, perform fault self-check, and automatically adjust to a stable state.

[0060] The advantages are: by calculating the pressure stability index Wj, the system can monitor and adjust pressure changes in real time during the ablation process, ensuring good contact between the catheter and the tissue and stable energy transfer, thereby improving the safety and effectiveness of the procedure.

[0061] The accuracy assessment unit calculates the tissue damage depth He based on optical monitoring data, and determines the ablation effect Qx based on the tissue damage depth He. The calculation formula is as follows:

[0062]

[0063]

[0064] In the formula, Indicates the ablation effect. Indicates the depth of tissue damage. Indicates the strength of the OCT signal. and It is a constant, determined by combining historical training data with a deep model. This represents the set of expected ablation depth values.

[0065] The impedance detection and evaluation module evaluates the ablation effect. The evaluation is used to determine whether the tissue damage depth under the current detection mode meets the expected results, by calculating the tissue damage depth. Set of expected ablation depth values Comparison, when the depth of tissue damage Belongs to the set of expected ablation depth values When the tissue damage is deep enough, the ablation effect is considered effective. Not part of the set of expected ablation depth values If the ablation effect is ineffective, the ablation effect should be evaluated to determine whether it has achieved the expected goal.

[0066] The advantage is that it allows for the calculation of tissue damage depth. And according to the depth of tissue damage Determine the ablation effect The ablation catheter feedback adjustment module automatically adjusts the catheter position based on the evaluation results of the impedance detection and evaluation module. The sampling frequency, signal gain, and data processing algorithm parameters of the remote monitoring device are monitored and optimized by the ablation catheter management module, making the system more intelligent, efficient, and accurate.

[0067] The ablation catheter feedback adjustment module automatically adjusts the catheter position or the operating parameters of the remote monitoring device (including adjusting key parameters such as current intensity and pulse frequency) based on the evaluation results of the impedance detection and evaluation module to ensure that the ablation process is carried out under optimal conditions.

[0068] The ablation catheter management module manages and optimizes the entire monitoring module, forming an internal loop that keeps the entire system under control within a closed-loop feedback mechanism. It can continuously adjust operating parameters based on real-time monitoring data. This dynamic adjustment mechanism can promptly respond to any abnormalities that occur during the procedure, ensuring ablation effectiveness and patient safety.

[0069] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An impedance detection and evaluation system for an ablation catheter, characterized in that, It includes an ablation catheter monitoring module, an ablation data acquisition module, an ablation data analysis module, an impedance detection and evaluation module, an ablation catheter feedback adjustment module, and an ablation catheter management module, with the modules connected via network ports; The ablation catheter monitoring module collects impedance data, pressure data, and optical data between the catheter electrode and the tissue in real time through a remote monitoring device. The ablation data acquisition module collects data from the ablation catheter monitoring module and performs preliminary processing, including cleaning, uniform formatting, and numbering. The ablation data analysis module analyzes the collected data in real time to evaluate the ablation effect and adhesion status; The impedance detection and evaluation module further evaluates the impedance detection and analysis results; The ablation catheter feedback adjustment module automatically adjusts the position or operating parameters of the catheter based on the evaluation results. The ablation catheter management module manages and optimizes the entire monitoring module, forming an internal loop.

2. The impedance detection and evaluation system for an ablation catheter according to claim 1, characterized in that: The ablation data acquisition module includes an impedance detection data acquisition unit, a pressure change data acquisition unit, and an optical monitoring data acquisition unit. The impedance detection data acquisition unit is used to measure the impedance value between the catheter electrode and the tissue to determine the contact status. The pressure change data acquisition unit uses a fiber optic sensor or a microelectrode array to monitor the pressure changes of various parts of the catheter in real time. The optical monitoring data acquisition unit uses optical measurement data from a remote monitoring device to assist in determining the contact status. The impedance detection data acquisition unit, the pressure change data acquisition unit, and the optical monitoring data acquisition unit are connected to the ablation data analysis module through a network port.

3. The impedance detection and evaluation system for an ablation catheter according to claim 2, characterized in that: The impedance detection data acquisition unit acquires impedance detection data through a remote monitoring device and numbers it. The impedance detection data are numbered Z1, Z2, Z3, ... Z n .

4. The impedance detection and evaluation system for an ablation catheter according to claim 2, characterized in that: The pressure change data acquisition unit acquires pressure change data through a remote monitoring device and assigns numbers to it. The pressure change data is numbered as follows: , , ... .

5. The impedance detection and evaluation system for an ablation catheter according to claim 2, characterized in that: The optical monitoring data acquisition unit acquires optical monitoring data through a remote monitoring device and assigns numbers to it. The optical monitoring data includes the intensity of the OCT signal, and the intensity of the OCT signal is numbered as follows: .

6. The impedance detection and evaluation system for an ablation catheter according to claim 5, characterized in that: The ablation data analysis module includes a contact degree evaluation unit, an ablation effect evaluation unit, and an accuracy evaluation unit.

7. The impedance detection and evaluation system for an ablation catheter according to claim 6, characterized in that: The fit evaluation unit calculates the fit status based on impedance detection data. The calculation formula is as follows: ； In the official Indicates the fit state. 、 、 、… This represents impedance measurement data. Indicates the number of tests. Indicates the first Each impedance measurement data, Indicates the preset threshold. This indicates the preset warning value.

8. The impedance detection and evaluation system for an ablation catheter according to claim 6, characterized in that: The ablation effect evaluation unit calculates the pressure stability index based on pressure change data. The calculation formula is as follows: ； In the official 、 、 、… This represents data on pressure changes. Indicates the first Individual pressure change data, Indicates the number of measurements.

9. The impedance detection and evaluation system for an ablation catheter according to claim 6, characterized in that: The accuracy assessment unit calculates the tissue damage depth based on optical monitoring data. And according to the depth of tissue damage Determine the ablation effect The calculation formula is as follows: ； ； In the official Indicates the ablation effect. Indicates the depth of tissue damage. Indicates the strength of the OCT signal. and It is a constant. This represents the set of expected ablation depth values.

10. The impedance detection and evaluation system for an ablation catheter according to claim 9, characterized in that: The impedance detection and evaluation module is based on the bonding state. Assess the fit to determine the quality of adhesion between the catheter electrode and the tissue in the current detection mode; The impedance detection and evaluation module is based on the pressure stability index. To evaluate the stability of the ablation catheter under the current detection mode; The impedance detection and evaluation module is based on the ablation effect. The assessment is used to determine whether the depth of tissue damage under the current detection mode meets the expected results.

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