## Distinguishing Convulsive vs Non-Convulsive Status Epilepticus ### Key Discriminator **Key Point:** The hallmark distinguishing feature of convulsive status epilepticus (CSE) is the **presence of visible, rhythmic motor manifestations** — tonic-clonic jerking, sustained muscle contractions, or repetitive movements observable to the naked eye. Non-convulsive status epilepticus (NCSE) lacks these visible motor signs. ### Comparison Table | Feature | Convulsive SE | Non-Convulsive SE | | --- | --- | --- | | **Visible motor activity** | Present (tonic-clonic jerks, sustained contraction) | Absent or subtle (eye fluttering, lip smacking) | | **Consciousness** | Altered | Altered (often the only sign) | | **Metabolic derangement** | Severe (↑lactate, acidosis, hyperthermia) | Mild to moderate | | **EEG findings** | Continuous or near-continuous seizure discharges | Continuous discharges (similar pattern) | | **Clinical recognition** | Obvious to bedside observer | Requires high index of suspicion; EEG mandatory | ### Clinical Pearl **Clinical Pearl:** Non-convulsive status epilepticus is a **diagnostic trap** in pediatric emergencies. A child with altered mental status, confusion, or behavioural change *without* visible seizures may still be in NCSE. EEG is essential to unmask it. Convulsive SE is immediately recognizable; NCSE requires vigilance. ### High-Yield Fact **High-Yield:** NCSE accounts for ~25% of all status epilepticus cases in children and is frequently missed. The absence of motor signs does **not** exclude SE — always consider EEG in any child with unexplained altered consciousness in the ICU or ED. [cite:Park 26e Ch 18]
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