Subdural hematoma classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Classification

There are 3 classification system for subdural hematoma:

• Subdural hematoma may be classified according to symptom onset and duration into 3 subtypes:
  • Acute: Develope less than 24 hours after head trauma (or other subdural hemorrhage causes)
  • Subacute: Develope between 1 to 10 days after head trauma (or other subdural hemorrhage causes)
  • Chronic: Develope weeks or months after head trauma (or other subdural hemorrhage causes)
• Subdural hematoma may be classified according to midline shift and thickness into 4 subtypes:
  • Type A: Thickness ≤ 1cm, midline shift ≤ 5 cm
  • Type B: Thickness > 1cm, midline shift ≤ 5 cm
  • Type C: Thickness > 1cm, midline shift > 5 cm
  • Type D: Thickness ≤ 1cm, midline shift > 5 cm
• Subdural hematoma may be classified according to imaging findings into 6 subtypes:
  • Type 1
  • Type 2
  • Type 3
  • Type 4
  • Type 5
  • Type 6

References

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