Brain Volume Changes in Patients with Acute Brain Dysfunction Due to Sepsis

Area of Science:

• Neuroimaging
• Neurology
• Radiology

Background:

• Sepsis-induced brain dysfunction (SIBD) is a common complication in sepsis, leading to increased morbidity.
• Currently, no specific diagnostic tests exist for SIBD, and conventional neuroimaging often yields normal results.
• This study investigates the potential of brain volumetric analysis for diagnosing SIBD and assessing prognosis.

Purpose of the Study:

• To evaluate the diagnostic utility of volumetric brain analysis in SIBD.
• To determine the prognostic significance of brain structure volumes in SIBD patients.
• To identify specific brain regions affected by volume reduction in SIBD.

Main Methods:

• Prospective observational study involving 25 SIBD patients and 22 healthy controls.
• Brain magnetic resonance imaging (MRI) was performed on all participants.
• Automated segmentation methods were used for volumetric evaluation of brain structures.

Main Results:

• Fifteen SIBD patients exhibited brain lesions or atrophy on MRI, while ten had normal findings.
• Significant volume reductions were observed in cerebral and cerebellar white matter, cerebral cortex, hippocampus, and amygdala.
• Reduced volumes in the hippocampus and cerebral white matter were noted even in SIBD patients with normal MRI scans.
• Lower volumes in caudate nuclei, putamen, and thalamus were associated with non-survival in SIBD patients.
• Coma patients showed more pronounced volume reduction in the left putamen and right thalamus.

Conclusions:

• Volumetric brain analysis is a sensitive method for detecting volumetric changes in SIBD.
• Reduced volumes in specific deep gray matter regions may serve as indicators of unfavorable outcomes in SIBD.
• Brain volumetric analysis holds potential as a prognostic measure for SIBD.