27 Jan '15, 8pm

Smart Neural Stimulators Listen to the Body

Smart Neural Stimulators Listen to the Body

The next challenge is determining whether a heart is beating faster because of a seizure or from another cause entirely, like exercise, an argument, or an exciting football game. False positives aren’t a major concern, because the stimulation pulses are rarely perceptible to patients. At most, if the current is very high they might feel tingling in their throats or experience hoarseness. Too many false positives could tax the battery, however, which is intended to last four to seven years, depending on the programmed settings. So to detect a truly abnormal spike in heart rate, the algorithm compares the last few seconds of ECG signals with the last few minutes’ signals to calculate the relative change. If a person’s heart rate increases gradually as she starts to jog, for example, the threshold for triggering an electric pulse will go up. Likewise, as a person’s heart rate...

Full article: http://spectrum.ieee.org/biomedical/bionics/smart-neural-...

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