An EEG for petit mal seizures can clarify the diagnosis. Petit mal seizures have unique pathological signs. In general, the doctor can basically make a diagnosis based on the patient’s seizure history and clinical symptoms. However, to ensure the accuracy of the diagnosis, an EEG has to be perfected.
The EEG during the onset of a petit mal seizure is visible as spike discharges at three times per second, in marked contrast to the EEG during the interictal period. However, the short duration of a petit mal seizure makes it difficult to acquire an EEG during the onset of the seizure. Therefore, a 24-hour ambulatory EEG is relatively more practical.
In addition, an EEG can only provide a definitive diagnosis of a petit mal seizure, not a definitive cause. Patients need to refine different types and directions of tests, such as brain CT examinations, MRI examinations and serological examinations, depending on their individual circumstances, which are important for subsequent treatment.