Catheter Navigation Using Synchronized ECG Waveform Analysis
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Solution Overview
Problem
Current methods for guiding endovascular devices and monitoring heart conditions lack precision and ease of use, particularly in accurately locating catheter tips within the cardiovascular system and remotely monitoring heart activity, due to limitations in existing electromagnetic and ECG-based systems.
Innovation Solution
The use of simultaneous skin surface and endovascular ECG signals to enhance catheter navigation and tip location, with algorithms analyzing synchronized signals to improve accuracy and reliability, and a mobile ECG signal acquisition module for remote monitoring and guidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If chest X-ray is used for confirming catheter tip location, then measurement precision is improved, but loss of time and productivity deteriorate due to repeated procedures
Solution Approach 1:
The system performs preliminary ECG signal acquisition and analysis during catheter insertion to predict tip location before final placement. By analyzing ECG waveform characteristics in real-time during the procedure, the system allows operators to anticipate the catheter tip position and make adjustments before X-ray confirmation is needed, reducing repeated procedures and procedure time
Solution Approach 2:
The system provides continuous real-time feedback through ECG waveform monitoring and location prediction during catheter insertion. The displayed predicted location and waveform changes give immediate feedback to operators about catheter tip position, enabling continuous adjustment without waiting for intermittent X-ray images, thus reducing procedure time while maintaining accuracy
2Ease of operation
If electromagnetic guiding systems are used, then ease of operation is improved, but measurement precision deteriorates due to inability to discriminate specific locations
Solution Approach 1:
The system replaces electromagnetic field-based location measurement with ECG waveform analysis for location prediction. By substituting the measurement mechanism from electromagnetic sensing to physiological signal analysis, the system achieves both ease of operation (continuous real-time monitoring) and high measurement precision (specific location discrimination through waveform characteristics)
Solution Approach 2:
The system changes the measurement parameter from electromagnetic field strength to ECG waveform characteristics (amplitude, morphology, timing). This parameter change enables discrimination of specific cardiac locations by analyzing subtle variations in ECG signals, achieving both operational ease and location precision
3Measurement precision
If ECG-based systems are used, then measurement precision is improved for anatomical location, but device complexity increases
Solution Approach 1:
The system uses a single ECG monitoring device to perform multiple functions: continuous heart rhythm monitoring and catheter tip location prediction. By making the ECG system multi-functional, the patent avoids adding separate complex localization devices while achieving high measurement precision through waveform analysis
Solution Approach 2:
The system uses the patient's own ECG signals, which are already being recorded during the procedure, to determine catheter tip location. The existing ECG monitoring infrastructure serves dual purposes, eliminating the need for additional specialized equipment and reducing overall device complexity while maintaining high location accuracy
4Productivity
If real-time ECG guidance is implemented, then productivity is improved by reducing X-ray usage, but device complexity increases
Solution Approach 1:
The system merges ECG signal acquisition, waveform analysis, and location prediction into a single integrated process. By combining these functions that were previously separate (ECG monitoring plus separate localization imaging), the system improves productivity through continuous real-time guidance while managing device complexity through functional integration
Data Source
AI summary
Devices and methods obtain and use endovascular electrograms in a number of clinical applications and settings. In one embodiment, methods for triggering analysis of an endovascular ECG waveform are based on the detection of a peak in a skin-based ECG waveform in order to determine a location of an indwelling medical device, such as a catheter. In another embodiment, the position of a catheter or other medical device within the vasculature can be determined by analysis of the energy profile of a detected P-wave. In yet other embodiments, magnetic connecting devices are used for establishing an operable connection through a sterile field.