A 19-year-old male presents to the emergency department following blunt head trauma from a motor vehicle collision 90 minutes ago. Initially he was alert and oriented with a brief loss of consciousness that resolved within seconds. He now complains of a severe frontal headache and appears increasingly lethargic. His pupils remain equal and reactive bilaterally. Vital signs: BP 145/92 mmHg, HR 68 bpm, RR 16/min, temperature 37.2°C. Non-contrast CT head shows a lens-shaped (biconvex) hyperdense collection overlying the right frontal convexity, with mass effect on the adjacent brain. Which of the following vessels is most likely responsible for this hemorrhage?
- A)Middle meningeal arteryGABARITO
- B)Superior sagittal sinus
- C)Anterior cerebral artery
- D)Bridging veins crossing the subdural space
- E)Posterior inferior cerebellar artery
Explicação
The biconvex (lens-shaped) hyperdense collection is pathognomonic for acute epidural hematoma. The middle meningeal artery, which runs in grooves between the dura mater and inner table of the skull, is torn in approximately 85% of epidural hematomas—typically ... Ver explicação completa e trilha adaptativa →