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Hypothermia as an adjunctive treatment for severe bacterial meningitis
J E Irazuzta1, R Pretzlaff, M Rowin
1Division of Critical Care, Children's Hospital Medical Center, Cincinnati, OH, USA. irazuzta@aol.com
Abstract:
Brain injury due to bacterial meningitis results in a high mortality rate and significant neurologic sequelae in survivors. The objective of this study was to determine if the application of moderate hypothermia shortly after the administration of antibiotics would attenuate the inflammatory response and increase in intracranial pressure that occurs in meningitis. For this study we used a rabbit model of severe Group B streptococcal meningitis. The first component of this study evaluated the effects of hypothermia on blood-brain barrier function and markers of inflammation in meningitic animals. The second part of the study evaluated the effects of hypothermia on intracranial pressure, cerebral perfusion pressure and brain edema. This study demonstrates that the use of hypothermia preserves CSF/serum glucose ratio, decreases CSF protein and nitric oxide and attenuates myeloperoxidase activity in brain tissue. In the second part of this study we show a decrease in intracranial pressure, an improvement in cerebral perfusion pressure and a decrease in cerebral edema in hypothermic meningitic animals. We conclude that in the treatment of severe bacterial meningitis, the application of moderate hypothermia initiated shortly after antibiotic therapy improves short-term physiologic measures associated with brain injury.
Insights
Moderate hypothermia applied after antibiotics reduces brain inflammation and intracranial pressure in bacterial meningitis. This treatment improves physiological measures, potentially aiding recovery in severe meningitis cases.
Area of Science:
- Neurology
- Infectious Diseases
- Critical Care Medicine
Background:
- Bacterial meningitis causes high mortality and severe neurological deficits.
- Brain injury in meningitis is linked to inflammation and increased intracranial pressure.
Purpose of the Study:
- To investigate if moderate hypothermia mitigates inflammation and intracranial pressure in bacterial meningitis.
- To assess hypothermia's effects on blood-brain barrier function and cerebral hemodynamics.
Main Methods:
- A rabbit model of severe Group B streptococcal meningitis was utilized.
- Evaluated hypothermia's impact on cerebrospinal fluid markers, brain myeloperoxidase activity, intracranial pressure, cerebral perfusion pressure, and brain edema.
Main Results:
- Hypothermia preserved the cerebrospinal fluid/serum glucose ratio.
- Reduced cerebrospinal fluid protein, nitric oxide levels, and brain myeloperoxidase activity.
- Decreased intracranial pressure, improved cerebral perfusion pressure, and reduced cerebral edema.
Conclusions:
- Moderate hypothermia initiated post-antibiotic therapy shows promise in managing severe bacterial meningitis.
- Hypothermia improves short-term physiological indicators of brain injury in meningitis.