Febrile Seizure

Apply the febrile-seizure framework only to a child aged 6 months through 5 years with fever above 38°C and no evidence of CNS infection, metabolic disturbance, or prior afebrile seizures. A seizure outside this age range, without fever, or with a preceding afebrile event should not be managed as a routine febrile seizure and requires an alternate seizure evaluation. BMJ+2BMJFebrile seizure - Symptoms, diagnosis and treatment | BMJ Best Practice USBMJFebrile seizure - Symptoms, diagnosis and treatment | BMJ Best Practicecks nice org ukDefinition | Background information | Febrile seizure | CKS | NICE

Obtain a witness chronology before assigning classification: focal onset or unilateral motor activity, total convulsive duration, recurrence before baseline recovery, and time to normal mental status. A simple febrile seizure is generalized, lasts less than 15 minutes, occurs once during the febrile illness, and has complete recovery within 1 hour. One or more departures from those criteria defines a complex febrile seizure. cks nice org ukcks nice org ukDefinition | Background information | Febrile seizure | CKS | NICE

Use the 5-minute treatment threshold rather than waiting for the historical 30-minute definition of febrile status epilepticus. Persistent convulsive activity for 5 minutes or more, or repeated seizures without recovery, requires active seizure management while airway, breathing, circulation, glucose, temperature, and the possibility of CNS infection are assessed. cks nice org ukcks nice org ukDefinition | Background information | Febrile seizure | CKS | NICE

If convulsions have stopped and the child has recovered appropriately, do not administer acute antiseizure treatment solely because the event was a febrile seizure; most episodes resolve spontaneously and quickly. Continue observation until mental status permits a reliable neurologic examination and the fever source can be evaluated. BMJ+1BMJFebrile seizure - Symptoms, diagnosis and treatment | BMJ Best Practice USBMJFebrile seizure - Symptoms, diagnosis and treatment | BMJ Best Practice

For ongoing seizure activity at 5 minutes, use a benzodiazepine-based rescue approach as the initial pharmacologic class. Diazepam, lorazepam, and midazolam are identified as mainstays of treatment for acute repetitive seizures; route selection depends on IV access and setting. ScienceDirect+1ScienceDirectManagement of acute seizures in children: A review with special consideration of care in resource-limited settingscks nice org ukDefinition | Background information | Febrile seizure | CKS | NICE

Do not let apparent fever explain persistent obtundation, focal deficits, or repeated seizures. In those settings, prioritize stabilization and investigate meningitis or encephalitis rather than labeling the episode solely as complex febrile seizure. BMJ+1BMJFebrile seizure - Symptoms, diagnosis and treatment | BMJ Best Practice USpublications aapFebrile Seizures: Guideline for the Neurodiagnostic Evaluation of the Child with a Simple Febrile Seizure | Pediatric Clinical Practice Guidelines & Policies | AAP Books | American Academy of Pediatrics

For the child with a first simple febrile seizure, direct the history and physical examination to the cause of fever and to signs of meningitis. The AAP neurodiagnostic guidance is specifically framed around the first simple febrile seizure, and the principal diagnostic fork is whether clinical findings support lumbar puncture for suspected CNS infection. BMJ+1BMJFebrile seizure - Symptoms, diagnosis and treatment | BMJ Best Practice USpublications aapFebrile Seizures: Guideline for the Neurodiagnostic Evaluation of the Child with a Simple Febrile Seizure | Pediatric Clinical Practice Guidelines & Policies | AAP Books | American Academy of Pediatrics

Use lumbar puncture when the history or examination raises concern for meningitis. Fever-associated seizure does not itself establish CNS infection, but meningeal illness must be excluded before the event is classified as a febrile seizure. BMJ+2BMJFebrile seizure - Symptoms, diagnosis and treatment | BMJ Best Practice USBMJFebrile seizure - Symptoms, diagnosis and treatment | BMJ Best Practicecks nice org ukDefinition | Background information | Febrile seizure | CKS | NICE

Complex features should increase diagnostic vigilance but do not themselves identify a single etiology. Focality, prolonged duration, recurrence, and delayed recovery should trigger repeated neurologic examination and a case-specific decision regarding CNS infection and other acute neurologic pathology. BMJ+2BMJFebrile seizure - Symptoms, diagnosis and treatment | BMJ Best Practice USBMJFebrile seizure - Symptoms, diagnosis and treatment | BMJ Best Practicecks nice org ukDefinition | Background information | Febrile seizure | CKS | NICE

After a simple febrile seizure with appropriate recovery and no evidence of CNS infection, routine long-term anticonvulsant therapy is not indicated. Most febrile seizures are self-limited, and standard guidance does not support acute or chronic anticonvulsant treatment for the usual completed event. BMJ+1BMJFebrile seizure - Symptoms, diagnosis and treatment | BMJ Best Practice USBMJFebrile seizure - Symptoms, diagnosis and treatment | BMJ Best Practice

Intermittent diazepam during febrile illnesses reduced recurrent febrile-seizure frequency by 44% in a controlled trial, but anticonvulsant prophylaxis does not alter the risk of later unprovoked seizures. Consideration of intermittent prophylaxis therefore requires a patient-specific discussion of recurrence burden versus medication tradeoffs rather than an expectation of epilepsy prevention. NEJM+1NEJMA Prospective Study of Recurrent Febrile Seizures | New England Journal of MedicineNEJMA Controlled Trial of Diazepam Administered during Febrile ...

Give caregivers a time-based action plan: place the child safely during a convulsion, observe and record seizure duration, and seek emergency care for a seizure that reaches 5 minutes, repeated seizures without recovery, focal manifestations, or incomplete recovery. The 5-minute threshold reflects the point at which convulsive-status treatment should begin. cks nice org ukcks nice org ukDefinition | Background information | Febrile seizure | CKS | NICE

Reassure families that the overall risk of epilepsy after febrile seizure is low, while explaining that it is not uniform. Family history of epilepsy, complex seizure features, and neurodevelopmental abnormalities are associated with later epilepsy and should be recorded at the first presentation and reviewed after recurrence. BMJ+2BMJFebrile seizure - Symptoms, diagnosis and treatment | BMJ Best Practice USBMJFebrile seizure - Symptoms, diagnosis and treatment | BMJ Best PracticeNEJMA Prospective Study of Recurrent Febrile Seizures | New England Journal of Medicine

A history of two or more complex febrile seizures represents a distinct management scenario in clinical pathways, particularly when diazepam has been ineffective. Such children merit individualized reassessment rather than automatic application of the simple febrile-seizure pathway. BMJ+1BMJFebrile seizure - Symptoms, diagnosis and treatment | BMJ Best Practice USBMJFebrile seizure - Symptoms, diagnosis and treatment | BMJ Best Practice

Arrange follow-up around the discriminators that change the diagnosis: new afebrile seizures, developmental regression or abnormal development, focal events, prolonged events, or repeated complex episodes. A subsequent afebrile seizure no longer fits the standard febrile-seizure definition and should prompt evaluation for epilepsy or another seizure disorder. BMJ+2BMJFebrile seizure - Symptoms, diagnosis and treatment | BMJ Best Practice USBMJFebrile seizure - Symptoms, diagnosis and treatment | BMJ Best PracticeNEJMA Prospective Study of Recurrent Febrile Seizures | New England Journal of Medicine