Which hematoma results from venous injury and has a slower onset after head trauma, with symptoms such as headache and confusion?

Which hematoma results from venous injury and has a slower onset after head trauma, with symptoms such as headache and confusion?

• A. Epidural
• B. Subdural
• C. Subarachnoid
• D. Intraparenchymal

Answer: (B)

The core idea here is how the source of bleeding affects how fast symptoms appear after head trauma. Venous injuries bleed more slowly than arterial ones, so a hematoma from veins tends to accumulate gradually. That slower, venous bleed gives rise to a delayed, insidious onset of symptoms, often headache and confusion, as the accumulating blood increases pressure and disrupts brain function over hours to days. This pattern fits a subdural hematoma, which comes from tearing of the bridging veins that cross between the dura and the arachnoid. Because the bleed is venous, it tends to have a slower onset and a more protracted course. In imaging, subdural collections are often crescent-shaped and can cross suture lines, reflecting their ability to extend over the brain surface. By contrast, an epidural hematoma is typically from an arterial injury (often a branch of the middle meningeal artery) and tends to cause a rapid deterioration after a brief period of alertness. Subarachnoid bleeding fills the spaces around the brain and presents with a sudden, severe thunderclap headache and meningismus. Intraparenchymal (intracerebral) hemorrhage is bleeding into the brain tissue itself and usually presents with focal deficits or altered consciousness, without the same slow, gradual onset associated with venous bleeding.

The core idea here is how the source of bleeding affects how fast symptoms appear after head trauma. Venous injuries bleed more slowly than arterial ones, so a hematoma from veins tends to accumulate gradually. That slower, venous bleed gives rise to a delayed, insidious onset of symptoms, often headache and confusion, as the accumulating blood increases pressure and disrupts brain function over hours to days.

This pattern fits a subdural hematoma, which comes from tearing of the bridging veins that cross between the dura and the arachnoid. Because the bleed is venous, it tends to have a slower onset and a more protracted course. In imaging, subdural collections are often crescent-shaped and can cross suture lines, reflecting their ability to extend over the brain surface.

By contrast, an epidural hematoma is typically from an arterial injury (often a branch of the middle meningeal artery) and tends to cause a rapid deterioration after a brief period of alertness. Subarachnoid bleeding fills the spaces around the brain and presents with a sudden, severe thunderclap headache and meningismus. Intraparenchymal (intracerebral) hemorrhage is bleeding into the brain tissue itself and usually presents with focal deficits or altered consciousness, without the same slow, gradual onset associated with venous bleeding.