Related Experiment Video
Updated: Aug 15, 2026

Microdialysis of Excitatory Amino Acids During EEG Recordings in Freely Moving Rats
Published on: November 8, 2018
Serum sodium levels and probability of recurrent febrile convulsions
C A Hugen1, A M Oudesluys-Murphy, W C Hop
1Department of Paediatrics, Zuiderziekenhuis, Rotterdam, The Netherlands.
Insights
Low serum sodium levels are common in children with febrile convulsions and increase the risk of repeat seizures. Monitoring sodium levels can help manage febrile seizures.
Area of Science:
- Pediatrics
- Neurology
- Clinical Chemistry
Background:
- Febrile convulsions are common in childhood.
- The relationship between serum sodium levels and febrile convulsions requires further investigation.
Purpose of the Study:
- To investigate the association between serum sodium levels and febrile convulsions in children.
- To determine if serum sodium levels predict repeat convulsions.
Main Methods:
- Prospective study of 69 children with febrile convulsions.
- Comparison of serum sodium levels with control groups (children without fever, children with fever but no convulsions).
- Statistical analysis to assess the relationship between serum sodium and convulsion recurrence.
Main Results:
- 52% of children with febrile convulsions had low serum sodium (< 135 mmol/l).
- Mean serum sodium was significantly lower in children with febrile convulsions compared to controls.
- Lower serum sodium levels correlated with a higher probability of repeat convulsions.
Conclusions:
- Serum sodium measurement is a valuable diagnostic tool for children with febrile convulsions.
- Low serum sodium levels indicate an increased risk of recurrent febrile seizures.
- Findings can inform clinical decisions regarding admission and parental counseling.
Unlabelled:
In a prospective study of 69 children with febrile convulsions, serum sodium levels were often lower than normal (52% had levels < 135 mmol/l). The mean level (134.4 +/- 0.4 mmol/l) was significantly lower as compared to a group of children without fever (140.6 +/- 0.4 mmol/l, n = 23) and as compared to a group with fever but without convulsions (137.6 +/- 0.6 mmol/l, n = 31). The probability of a repeat convulsion within the same febrile period appeared to be significantly related to the serum sodium level.
Conclusion:
Measurement of the serum sodium is a valuable investigation in the child with a febrile convulsion. The lower the serum sodium level, the higher the probability of a repeat convulsion. This knowledge may be of practical value in deciding whether to admit the child or allow it to return home and in advising parents or carers of the risk of a repeat convulsion.
Related Concept Videos
Epilepsy and Seizures: Overview
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
Seizures: Classification
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:
Serum Studies: Renal Function Tests
Encephalitis l: Introduction
Seizures l: Introduction
Epilepsy ll: Types

