What are 2 differences between epidural and subdural hematomas?

An epidural hematoma lies outside (on top) of the dura mater (epi is Greek for upon), while a subdural hematoma lies inside (beneath) the dura mater (sub is Greek for below) and outside the arachnoid mater. A third kind of hematoma caused by head injuries is traumatic intracerebral hemorrhage.

How can you tell the difference between a subdural hematoma and an epidural CT?

Subdural hematomas are concave toward the brain and unlimited by suture lines, as opposed to epidural hematomas, which are convex toward the brain and restricted by suture lines. Rarely, a subdural hematoma appears lens shaped (ie, more like an epidural hematoma).

Which is worse epidural hematoma or subdural hematoma?

Because of associated brain injuries and complications of secondary injury, the outcome of subdural hematoma is worse than that of epidural hematoma in children. Surgical intervention may be necessary, especially with large subdural hematomas causing a mass effect.

What is the difference between epidural and subdural space?

The epidural space, bordered medially by dura, contains fat and vascular structures. The subdural space is a virtual space in between the dura and arachnoid membrane. The subarachnoid space is home to the CSF, spinal cord and nerve rootlets.

What is the difference between subarachnoid and subdural hemorrhage?

If the blood vessels are damaged, they bleed into the subdural space. Subarachnoid hemorrhage most commonly occurs after trauma where cortical surface vessels are injured and bleed into the subarachnoid space. Non-traumatic subarachnoid hemorrhage is most commonly due to the rupture of a cerebral aneurysm.

Can subdural hematoma be treated without surgery?

Chronic subdural hematoma can be treated with tranexamic acid without concomitant surgery. Tranexamic acid might simultaneously inhibit the fibrinolytic and inflammatory (kinin-kallikrein) systems, which might consequently resolve CSDH.

What are the chances of surviving a subdural hematoma?

If you have a subdural hematoma, your prognosis depends on your age, the severity of your head injury and how quickly you received treatment. About 50% of people with large acute hematomas survive, though permanent brain damage often occurs as a result of the injury.

What causes subdural hematoma?

The most common cause for a subdural hematoma is head injury. This can be from a car crash, fall, or violent attack. This sudden impact can strain the blood vessels within the dura, causing them to rip and bleed. Sometimes small arteries also break within the subdural space.

What causes a subdural or epidural hematoma?

Subdural and epidural hematomas are abnormal collections of blood within the meninges surrounding the brain. They are the result of an intracranial hemorrhage that can then form into a subdural or epidural hematoma depending on the location.

Why does an epidural hematoma have an elliptical appearance?

Epidural Hematoma. Epidural hematomas occur when an artery is injured and arterial blood accumulates between the dura and the calvarium. Do not cross suture lines because of the tight adherence of the dura to the calvarium and thus have a biconvex or elliptical appearance.

Where does a subdural hematoma appear on CT?

A subdural hematoma, as the name suggests, is an abnormal collection of blood beneath the dura mater. Therefore, a subdural hematoma is located between the dura and arachnoid layers of the meninges. It appears as a convex, crescent-shaped hemorrhage on head imaging.

What causes bleeding in the subural space of the head?

Tearing of bridging veins during rapid or sudden changes in velocity thereby causing an accumulation of venous blood below the dura but above the arachnoid membrane (i.e., the “subural space”). Cross suture lines since bleeding is below the dura, which is tightly attached to the calvarium, thus giving the “crescent shape” appearance on head CT.