Алгоритм автоматического детектирования спорадических эпилептиформных разрядов в ранней стадии развития церебральной отсроченной ишемии

Algorithm for automatic detection of sporadic epileptiform discharges in the early stage of development of delayed cerebral ischemia

An algorithm for automatic detection of delayed cerebral ischemia index during electroencephalographic monitoring of a patient after subarachnoid hemorrhage - dynamics of sporadic epileptiform discharges, has been developed. The algorithm is based on the analysis of the cross-correlation function of the electroencephalogram with a selected sample of epileptiform spike-wave discharge. The synchronization of channels located throughout the head was studied. The number of hourly epileptiform discharges was calculated both separately for the hemispheres - the left and the right, and for the zones of the brain - frontal, parietal and central. As a result of applying the algorithm, peak-wave discharges per hour clusters exceeding the threshold value and related in time are identified. The algorithm was applied to 14 control patients and 10 patients diagnosed with delayed cerebral ischemia. Sensitivity, accuracy, and selectivity of algorithm is equal to 90%, 83%, and 79% respectively.