Pacing Electrode Implantation With Left Bundle Branch Signal Feedback
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Solution Overview
Problem
Existing cardiac pacing technologies face challenges in accurately positioning pacing electrodes at the His-Purkinje system, particularly the left bundle branch, leading to potential misplacement and complications such as atrial fibrillation and heart failure.
Innovation Solution
A medical device system that provides audible and visual feedback during electrode implantation, utilizing cardiac electrical signal analysis, imaging, and impedance measurements to guide the pacing electrode to the left bundle branch, ensuring precise placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional transvenous lead techniques are used for ventricular pacing, then the procedure is simpler and more established, but the risk of atrial fibrillation and heart failure increases due to improper positioning
Solution Approach 1:
The patent employs real-time feedback mechanisms including intracardiac electrogram (IEGM) signal analysis and impedance measurements to guide electrode advancement. The system provides continuous feedback to the operator about electrode position relative to the His-Purkinje system, enabling precise placement while reducing complications. This feedback loop transforms the implantation process from a blind procedure to a guided one, resolving the contradiction between accuracy and complexity.
Solution Approach 2:
The patent replaces traditional mechanical fluoroscopic guidance with electrical signal-based navigation. By analyzing IEGM signals and impedance characteristics, the system substitutes visual-mechanical guidance with electro-physiological feedback, achieving more precise positioning without relying on complex imaging equipment and reducing radiation exposure.
2Manufacturing precision
If pacing electrode is advanced deeper into the septum to reach the left bundle branch, then more physiologically normal cardiac activation is achieved, but the risk of perforation and misplacement increases
Solution Approach 1:
The system continuously monitors impedance changes and IEGM signal characteristics during electrode advancement. When the electrode approaches the optimal position near the left bundle branch, specific impedance patterns and signal morphologies are detected, providing real-time feedback to prevent over-advancement and perforation. This feedback mechanism enables precise positioning while safety-limiting further insertion.
Solution Approach 2:
The patent performs preliminary impedance measurements and signal analyses before final electrode deployment. By assessing electrical characteristics during the advancement process, the system identifies the optimal stopping point before perforation can occur, allowing precise positioning while preemptively preventing harmful over-insertion.
3Measurement precision
If visual and audible feedback systems are implemented during implantation, then placement accuracy is improved, but the device complexity and procedure time increase
Solution Approach 1:
The patent replaces complex visual imaging systems with simpler electrical signal analysis. By using impedance measurements and IEGM signal processing, the system achieves accurate positioning without requiring sophisticated imaging equipment, thereby reducing procedure complexity and time while maintaining high measurement precision.
Solution Approach 2:
The system uses the heart's own electrical signals and the electrode's inherent impedance properties as feedback mechanisms. These self-generated signals eliminate the need for external imaging or complex guidance equipment, achieving precise localization through the tissue's intrinsic electrical characteristics rather than external observation tools.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the accuracy of pacing electrode placement along the His-Purkinje system, reducing human error and complications, and improving ventricular synchrony and cardiac performance.
Implementation Method 1
A medical device system configured to process and analyze cardiac electrical signals and generate user feedback signals
Implementation Method 2
analysis of intracardiac electrogram (EGM) signals and/or electrocardiogram (ECG) signals, pacing capture tests and/or electrode impedance signals
Data Source
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AI summary
A medical device system is configured to guide implantation of a pacing electrode for left bundle branch pacing. The system includes a medical device having a processor configured to receive at least one cardiac electrical signal, determine a feature of the cardiac electrical signal, compare the feature to left bundle branch signal criteria, and determine a left bundle branch signal in response to the feature meeting the left bundle branch signal criteria. The system includes a display unit configured to generate a user feedback signal indicating advancement of a pacing electrode into a left portion of a ventricular septum in response to the processor determining the left bundle branch signal.