Does an epidural hematoma cross midline?

Epidural hematomas can cross at the midline because they are located above the dura. This characteristic can be a distinguishing feature between epidural and subdural hematomas.

What is the difference between epidural and extradural hematoma?

Extradural hematoma (EDH), also known as an epidural hematoma, is a collection of blood that forms between the inner surface of the skull and outer layer of the dura, which is called the endosteal layer. They are usually associated with a history of head trauma and frequently associated skull fracture.

Why does Extradural haemorrhage not cross suture lines?

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.

Which artery is affected in epidural hematoma?

An epidural hematoma (EDH) is usually caused by a head injury. A skull fracture occurs in 75% of the cases. A skull fracture that tears the middle meningeal artery is the most common source of bleeding.

Can EDH cross midline?

Typically lentiform (lens-shaped, biconvex, lemon-shaped) and do not cross sutures as the periosteum crosses through the suture continuous with the outer periosteal layer.

Is an epidural hematoma worse than a subdural?

Because epidural hematomas typically involve an artery, bleeding and increased intracranial pressure may occur much more rapidly, requiring more urgent intervention. In contrast, though still serious, subdural hematomas involve veins which tend to bleed and grow more slowly.

What is the main source of bleeding in extradural hematomas?

The source of bleeding is usually arterial, most commonly from a torn middle meningeal artery. EDHs are typically biconvex in shape and can cause a mass effect with herniation. They are usually limited by cranial sutures, but not by venous sinuses.

Would you expect a hemorrhage found in the epidural space to be from damage to an artery or a vein?

This bleeding may be either arterial or venous. The classic epidural hematoma is observed with a linear skull fracture of the temporal bone, which tears the middle meningeal artery, allowing blood to accumulate under pressure in the epidural space. However, sizable epidural hematoma of venous origin may also occur.