epidural hematoma is the term for a collection of blood located outside the dura mater.
epidural hematoma is the term for a collection of blood located outside the dura mater.
what is the term for a collection of blood located outside the dura mater?
epidural hematoma
many medical conditions involve the dura mater. a subdural hematoma occurs when there is an abnormal collection of blood between the dura and the arachnoid, usually as a result of torn bridging veins secondary to head trauma. an epidural hematoma is a collection of blood between the dura and the inner surface of the skull, and is usually due to arterial bleeding. intradural procedures, such as removal of a brain tumour, or treatment of trigeminal neuralgia via a microvascular decompression require that an incision is made to the dura mater. to achieve a watertight repair and avoid potential post-operative complications the dura is typically closed with sutures. in the event that there is a dural deficiency, a dural substitute may be used to replace this membrane. small gaps in the dura can be covered with a surgical sealant film.
dura mater
the dura mater has several functions and layers. the dura mater is a membrane that envelops the arachnoid mater. it surrounds and supports the dural sinuses (also called dural venous sinuses, cerebral sinuses, or cranial sinuses) and carries blood from the brain toward the heart.









































the dura mater has two layers called "lamellae": the superficial layer (also called the periosteal layer), which serves as the skull's inner periosteum, called the endocranium; and a deep layer called the meningeal layer; the actual dura mater. when it covers the spinal cord it is known as the "dural sac" or thecal sac.
dura mater