What type of hematoma is associated with a tear in the middle meningeal artery?
An epidural hematoma (EDH) develops when blood collects between the skull and the dura mater as the result of a severe head injury causing a skull fracture of the squamous portion of the temporal bone (> 90%) and producing a tear in the middle meningeal artery.
What will happen if the middle meningeal artery rupture due to a head injury?
Rupture of the artery, which most commonly occurs at the pterion, typically leads to an epidural hematoma. The resulting hematoma is described as a “lens-shaped” mass on a computed tomogram (CT) scan. Damage to the middle meningeal artery may also result in an aneurysm or arteriovenous fistulas.
What artery is damaged in epidural hematoma?
The cause is typically head injury that results in a break of the temporal bone and bleeding from the middle meningeal artery. Occasionally it can occur as a result of a bleeding disorder or blood vessel malformation.
What artery causes extradural hematoma?
The middle meningeal artery (MMA) also lies underneath the pterion and therefore fracture at this location can result in rupture of the MMA. As a result, the middle meningeal artery is involved in 75% of extradural haematomas.
Is middle meningeal artery Extradural?
Extradural hematomas are typically situated in the temporoparietal region and are associated with fracture of the temporal bone with resultant damage to the middle meningeal artery. They may, however, be bilateral or occur within the posterior cranial fossa. A skull fracture is present in 85% of cases in adults.
What is the clinical importance of knowing the location of the middle meningeal artery?
Middle meningeal artery (MMA)is an important branch which supplies among others cranial dura mater. It directly attaches to the cranial bones (is incorporated into periosteal layer of dura mater), favors common injuries in course of head trauma.
What is the meaning of Extradural?
Medical Definition of extradural : situated or occurring outside the dura mater but within the skull an extradural hemorrhage.
Where does an Extradural bleed occur?
An extradural hematoma is actually a subperiosteal hematoma located on the inside of the skull, between the inner table of the skull and parietal layer of the dura mater (which is the periosteum).
Where does middle meningeal vein drain into?
At the inferior margin, the meningeal veins drain into the large dural sinuses, while at the superior margin they drain into venous lacunae and the superior sagittal sinus.