A tiered strategy for investigating status epilepticus

Area of Science:

• Neurology
• Critical Care Medicine
• Neuroscience

Background:

• Status epilepticus (SE) is a medical emergency requiring prompt anti-seizure therapy.
• Investigating the underlying cause, consequences, and prognosis of SE becomes paramount once acute treatment begins.
• SE disproportionately affects lower and middle-income countries, necessitating rationalized investigation strategies.

Purpose of the Study:

• To outline a rationalized approach to investigating status epilepticus (SE).
• To highlight the importance of timely etiological diagnosis and its impact on prognosis and management.
• To discuss the utility of various diagnostic tools, including laboratory studies, EEG, and MRI.

Main Methods:

• Review of common and critical causes of SE.
• Emphasis on basic laboratory studies for systemic complications.
• Discussion of electroencephalography (EEG) for diagnosis, especially in non-convulsive SE.
• Evaluation of magnetic resonance imaging (MRI) for identifying brain changes and networks involved.

Main Results:

• Basic laboratory studies are essential for all SE patients due to potential systemic complications.
• EEG is critical for diagnosing SE in specific patient populations (anesthetized, non-convulsive).
• MRI excels at detecting cytotoxic changes and involved neural networks, though not yet a reliable prognostication tool.

Conclusions:

• A phased investigative model is proposed: immediate, scenario-targeted, results-guided, and rare-cause/super-refractory SE-targeted investigations.
• Early and accurate diagnosis of SE etiology is vital for guiding therapy and predicting outcomes.
• Integrating clinical presentation with diagnostic findings optimizes the management of status epilepticus.