Abstract
Objective : We investigated sharp wave transients (SWTs) on neonatal EEG to differentiate those found on EEG showing a normal pattern from those on EEG showing an abnormal pattern.Materials and Methods : One hundred twenty seven EEG recordings from 126 neonates were classified into normal, dysmature and disorganized patterns according to background EEG. The numbers of SWTs per minute and amplitudes and frequencies of SWTs were comparatively analyzed among these patterns.
Results : Sixty-seven recordings were diagnosed as normal patterns, 32, as disorganized patterns and 40, as dysmature patterns. The abundance of SWTs per minute (SWTs/mim) was significantly greater in neonates with a disorganized pattern (disorganized pattern group) (0.928±0.681) than in those with normal pattern (normal pattern group) (0.634±0.381) (p<0.01). SWTs/min at C and T were significantly greater in the disorganized pattern group than in the normal pattern group (p<0.05). In the dysmature pattern group, the rate SWTs/min was high in all regions, but not significantly greater than those in the other groups. SWTs /min with amplitude over 150μ V at F and those with amplitude over 100μ V at C and T were significantly greater in the disorganized pattern group than in the normal pattern group (p<0.001, 0.05, 0.05, respectively). SWTs /min with a frequency ranging from 4 to 7 Hz at C and T were significantly greater in the disorganized pattern group than in the normal pattern group (p<0.05).
Conclusions : There were significantly more contribute SWTs at C and T in the disorganized pattern group. This finding may significanly to reading neonatal EEGs.
