Using Staggered Changes in Amplitude and Frequency to Ameliorate Electrosensation During Treatment with Alternating Electric Fields
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United States of America
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Issued Date -
Apr 3, 2025
app pub date -
Sep 26, 2024
filing date -
Sep 26, 2024
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Abstract
When transducer arrays (i.e., arrays of electrode elements) are used to apply alternating electric fields (e.g., TTFields) to a subject's body, the subject may experience electrosensation. This electrosensation can be ameliorated by (a) increasing the amplitude of the field in a series of steps, and allowing some time to pass for the subject to acclimate to each step before the amplitude is increased to the next-higher value, (b) starting out at a frequency that is higher than the recommended frequency for each indication (e.g., higher than 200 kHz for treating glioblastoma), subsequently decreasing the frequency to the recommended frequency in a series of steps, and allowing some time to pass for the subject to acclimate to each step before the frequency is decreased to the next-lower value, and (c) avoiding (or at least minimizing) situations in which an increase in amplitude and a decrease in frequency occur simultaneously.
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