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JOURNAL ARTICLE

Prediction of acute encephalopathy with biphasic seizures and late reduced diffusion in patients with febrile status epilepticus

Takaoki Yokochi, Takahito Takeuchi, Jumpei Mukai, Yukihiro Akita, Kojiro Nagai, Keizo Obu, Tatsuyuki Kakuma, Toyojiro Matsuishi
Brain & Development 2016, 38 (2): 217-24
26242200

INTRODUCTION: Acute encephalopathy with biphasic seizures and late reduced diffusion (AESD) is the most common subtype of acute encephalopathy among children in Japan. The pathogenesis of AESD is mostly delayed cerebral edema caused by excitotoxic injury. It is difficult to discriminate AESD and complex febrile seizure in the early phase. Many cases have neurologic sequelae because early intervention is difficult.

METHODS: To establish an early diagnostic method, we assessed 213 hospitalized cases of febrile status epilepticus (FSE) between January 2004 and August 2014. We categorized FSE cases into an AESD group and a non-AESD group and compared their clinical courses, laboratory data and cranial computed tomography (CT) findings.

RESULTS: Of 213 hospitalized FSE cases, 19 (9%) were AESD. Univariate analysis showed that the AESD group took a significantly longer time to wake after FSE, had a higher degree of respiratory acidemia, and higher levels of serum AST, ALT, LD, hyperglycemia and hyperammonemia than the non-AESD group. We developed a scoring model that predicts AESD based on multivariate analysis. Using cut-off points of 4 and more with this scoring model, we could identify the AESD cases with 93% sensitivity and 91% specificity. These scores also had a positive correlation with prognosis.

DISCUSSION: Our scoring model enables early diagnosis of AESD. Patients with high scores should be observed carefully and early intervention should be considered.

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