Bipolar Ablation Catheter Time Slot Control

The ablation process is segmented into sequential time slots where only one electrode-pair is active at a time. The lasso catheter divides its multiple electrodes into different time slots, with each slot activating a specific electrode-pair for a defined duration. This temporal segmentation prevents simultaneous activation of all electrodes, thereby eliminating unintended electrode contact and reducing Joule heating while still achieving extended area ablation through sequential treatment of different segments.

The system employs periodic activation of electrode-pairs in a predefined cyclic pattern. Each electrode-pair is activated for a specific time slot within the cycle, followed by deactivation before the next electrode-pair activates. This periodic action ensures that electrodes are not continuously energized, reducing cumulative Joule heating and preventing harmful interactions between simultaneously active electrodes while maintaining effective ablation coverage over the extended tissue area.

The bipolar ablation pulses are applied in periodic bursts rather than continuously. Each pulse train is delivered to an electrode-pair for a defined time slot, followed by a pause period where no pulses are delivered. This periodic pulsed delivery allows thermal diffusion during the pause intervals, preventing excessive temperature accumulation and uncontrolled tissue damage while maintaining high ablation efficiency during the active pulse windows.

The system implements preliminary cooling intervals between successive pulses and electrode-pair activations. Before delivering the next pulse train or activating the next electrode-pair, a predetermined time gap is introduced to allow thermal dissipation. This preliminary action prevents temperature buildup that would lead to uncontrolled tissue damage while preserving ablation efficiency by ensuring each subsequent pulse starts from a safer thermal baseline.

The system applies partial activation of the electrode array by selectively energizing only the necessary electrode-pairs for each time slot rather than all electrodes simultaneously. This partial action approach achieves precise spatial control over the ablation field, treating only the intended tissue regions while minimizing treatment time by avoiding the complexity of managing all electrodes at once. The predefined time slot pattern optimizes which electrode-pairs are activated based on the specific ablation geometry required.

The electrode activation pattern is dynamically optimized through the predefined time slot sequence, where the system adapts which electrode-pairs are active at each moment based on the desired ablation geometry. This dynamic approach allows precise spatial control by activating specific electrode-combinations for specific time windows, achieving accurate ablation boundaries while minimizing total treatment time through intelligent temporal scheduling of electrode activations rather than static simultaneous activation.