Osmotic Demyelination Syndrome: Why Should Hypernatremia be Corrected Slowly? A Case Report
Journal Title: Journal of Advances in Medicine and Medical Research - Year 2014, Vol 4, Issue 18
Abstract
Aim: Our aim is to present a case of hypernatremia which has led on to a flaccid quadriparesis due to brain stem demyelination. Rapid correction of hypernatremia as a cause for pyramidal tract demyelination is not documented in the literature. Presentation of Case: A 53 year old male was brought to the emergency services with suspected stroke. He was treated with intravenous mannitol and oral glycerine from the primary health centre. We detected hypoglycemia (blood sugarwas 50mg/dl-Ref range: ≤70mg%) and dextrose was given intravenously. Subsequently the patient went into a hypernatremic state with serum sodium 170milli equivalents /liter which was corrected rapidly. This was corrected over 48 hours to 140milli equalents/litre. The rate of correction exceeded 0.62millimols/liter/hour (Ideal: 0.5 mmol/L/h). On the 6th day the patient developed acute quadriparesis. Magnetic resonance imaging (MRI) of brain revealed bilateral symmetric demyelination of the corticospinal tracts. Over six months the neurological deficit improved with complete resolution of the changes in previous MRI. Discussion: Osmotic Demyelination Syndrome (ODS) has been a recognized complication of rapid correction of hyponatremia. Experiments in animals and clinical experience suggest that correction of chronic hyponatremia should be kept at a slow rate to combat this complication. The characteristic sites include pons and basal ganglia. Such a complication has not been described due to rapid correction of hypernatremia.This is probably the first case report in the literature where acute onset of quadriparesis resulted from demyelination of the pyramidal tract consequent to a rapid correction of hypernatremia. We had to wait about 6 months for the patient to obtain a complete functional recovery and the neuro imaging was repeated after 6 months to confirm the disappearance of the initial findings thus implicating rapid correction of hypernatremia as the cause of his morbidity. Conclusion: This is the first time extrapontine reversible myelinolysis due to rapid correction of hypernatremia has been documented. To prevent this potentially fatal complication it will be prudent if hypernatremia is corrected slowly.
Authors and Affiliations
C. Rajasekharan, S. W. Renjith, D. T. Nishanth, Y. M. Naseem, R. Parvathy
Keywords
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- EP ID EP349203
- DOI 10.9734/BJMMR/2014/8262
- Views 47
- Downloads 0
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