Regional Brain Water Content and Distribution During Diabetic Ketoacidosis

Area of Science:

• Neurology
• Pediatrics
• Radiology

Background:

• Diabetic ketoacidosis (DKA) is a serious complication of diabetes.
• Brain edema is a significant concern in pediatric DKA.
• Understanding regional brain changes during DKA is crucial for patient management.

Purpose of the Study:

• To investigate regional differences in brain water content during DKA in children.
• To correlate these brain changes with regional vascular supply.
• To identify potential differences in brainstem involvement during DKA.

Main Methods:

• Magnetic resonance diffusion-weighted imaging (DWI) was used to assess brain water distribution.
• Apparent diffusion coefficient (ADC) of water was measured in various brain regions.
• Brain water content was quantified in a subset of pediatric patients during DKA and after recovery.

Main Results:

• Elevated ADC values, indicating vasogenic cerebral edema, were observed in the frontal cortex, basal ganglia, thalamus, and hippocampus during DKA.
• The medulla and occipital cortex showed no significant ADC increase during DKA.
• Regions supplied by the anterior/middle cerebral artery exhibited greater increases in ADC and water content compared to posterior cerebral artery-supplied regions.

Conclusions:

• Brainstem ADC changes during DKA differ from other brain regions.
• Regional variations in brain water content correlate with vascular supply territories.
• These findings suggest potential reduced brainstem blood flow during DKA, contrasting with hyperemia in other areas.