Offset Electrode Lead Roll Detection
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Solution Overview
Problem
Conventional localization systems, such as the ENSITE® NAVX® system, face challenges in accurately determining the position of electrodes due to field heterogeneities, which can lead to inaccurate placement and navigation of leads during invasive therapies, especially in cardiac procedures.
Innovation Solution
The use of electrodes with offset electrical centers and advanced switching mechanisms allows for the measurement of electrical potentials in three-dimensional fields, enabling correction for field heterogeneities and improving the accuracy of lead placement and navigation by determining lead roll and twist, thereby enhancing localization and navigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional localization systems are used to determine electrode position, then the system is simple and easy to operate, but the measurement precision is reduced due to field heterogeneities
Solution Approach 1:
The patent applies asymmetry by using electrodes with offset electrical centers relative to their geometric centers. This asymmetric configuration allows the electrode to detect field heterogeneities and determine lead roll angle, thereby improving measurement precision without requiring a completely new localization system
Solution Approach 2:
The patent changes the electrical parameters of the electrode by introducing an offset between the electrical center and geometric center. This parameter change enables the electrode to provide additional information about lead orientation and field heterogeneity, improving position accuracy while maintaining system simplicity
2Measurement precision
If electrodes with offset electrical centers are used, then lead roll and twist determination is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing electrodes that serve multiple functions: they act as both stimulation/electrosurgery electrodes and orientation sensors. The same offset electrical center configuration that creates field heterogeneity also enables lead roll and twist determination, eliminating the need for separate sensing components
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
This approach enhances the accuracy of lead placement and navigation by compensating for field heterogeneities, improving the precision of electrode positioning and motion tracking, which is crucial for effective cardiac therapies.
Implementation Method 1
measuring electrical potential in a three-dimensional potential field using the electrode
Data Source
AI summary
An exemplary method includes positioning a lead in a patient where the lead has a longitudinal axis that extends from a proximal end to a distal end and where the lead includes an electrode with an electrical center offset from the longitudinal axis of the lead body; measuring electrical potential in a three-dimensional potential field using the electrode; and based on the measuring and the offset of the electrical center, determining lead roll about the longitudinal axis of the lead body where lead roll may be used for correction of field heterogeneity, placement or navigation of the lead or physiological monitoring (e.g., cardiac function, respiration, etc.). Various other methods, devices, systems, etc., are also disclosed.