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Prevalence of severe hypokalaemia in patients with traumatic brain injury

Xing Wu1, Xin Lu2, Xiangqiong Lu2

  • 1Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, China.

Injury
|September 8, 2014
PubMed

Insights

Severe hypokalaemia (low potassium) significantly increases mortality risk in traumatic brain injury (TBI) patients. This condition, often developing within 24-96 hours, is an independent predictor of death in TBI cases.

Area of Science:

  • Neuroscience
  • Critical Care Medicine
  • Clinical Biochemistry

Background:

  • Traumatic brain injury (TBI) patients exhibit increased vulnerability to hypokalaemia (low serum potassium).
  • Understanding the prevalence and impact of severe hypokalaemia on TBI patient mortality is crucial.

Purpose of the Study:

  • To investigate the prevalence of hypokalaemia in TBI patients.
  • To determine the relationship between severe hypokalaemia and mortality in TBI patients.

Main Methods:

  • Retrospective analysis of 375 isolated TBI patients (age ≥14 years) with hypokalaemia (serum potassium <3.5 mmol/L) between 2008-2013.
  • Classification of hypokalaemia severity: mild (3.0-3.5 mmol/L), moderate (2.5-3.0 mmol/L), and severe (<2.5 mmol/L).
  • Multivariable logistic regression to assess the impact of hypokalaemia on mortality.

Main Results:

  • The peak incidence of severe hypokalaemia was observed within 24-96 hours post-injury.
  • TBI patients with severe hypokalaemia showed higher serum sodium and lower serum phosphorus levels.
  • Severe hypokalaemia, decreased Glasgow Coma Scale (GCS), and lower potassium levels were independently associated with increased mortality risk.

Conclusions:

  • Severe hypokalaemia is an independent risk factor for mortality in traumatic brain injury patients.
  • Patients with severe hypokalaemia are also prone to developing hypernatraemia and hypophosphataemia.
  • Early identification and management of severe hypokalaemia are critical for improving outcomes in TBI patients.
Abstract

Keywords:
HypernatraemiaHypokalaemiaHypophosphataemiaMortalityTraumatic brain injury

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