SUBDURAL HEMATOMA
A subdural hematoma is a collection of blood below the inner layer of the dura but external to the brain and arachnoid membrane. Subdural hematoma is the most common type of traumatic intracranial leison. A subdural hematoma is a collection of blood outside the brain. Subdural hematomas are usually caused by severe head injuries. The bleeding and increased pressure on the brain from a subdural hematoma can be life-threatening. Some subdural hematomas stop and resolve spontaneously; others require surgical drainage. Subdural hematoma occurs not only in patients with severe head injury but also in patients with less severe head injuries, particularly those who are elderly or who are receiving anticoagulants or blood thinners. …show more content…
This results from a slower rate of bleeding, causing a slowly enlarging subdural hematoma.In very slow-growing subdural hematomas, there may be no noticeable symptoms for more than two weeks after the bleeding starts. Acute subdural hematomas are less than 72 hours old and are overly dense compared with the brain on computed tomography scans. The subacute phase begins 3-7 days after acute injury. Acute subdural hematoma is the most common type of traumatic intracranial hematoma. Hernation can be cause by hematoma which is masses that expand within the skull, subdural hematomas may become lethal by increasing pressure within the brain, leading to pathologic shifts of brain tissue (brain herniations). Two common types of brain herniation are subfalcial (cingulate gyrus) herniation and transtentorial (uncal) herniation. Chronic subdural hematomas develop over the course of weeks and are hypodense compared with the brain. However, subdural hematomas may be mixed in nature, such as when acute bleeding has occurred into a chronic subdural hematoma. Chronic subdural hematoma can occur in the elderly after apparently insignificant head trauma. Often, the event is never recognized. Chronic subdural hematoma is commonly associated with cerebral atrophy. Cortical bridging veins are thought to be under greater tension as the brain gradually shrinks from the skull; even minor trauma may cause one of these veins to tear. Slow bleeding from the low-pressure venous system often enables large hematomas to form before clinical signs appear. Chronic subdural hematoma is a common treatable cause of dementia. Spontaneous subdural hematoma is rare. These cases often have an arterial source; they are usually associated with the same pathology as that involved in subarachnoid or intracerebral hemorrhage. The blood from a ruptured aneurysm may dissect through the
A subdural hematoma is a collection of blood below the inner layer of the dura but external to the brain and arachnoid membrane. Subdural hematoma is the most common type of traumatic intracranial leison. A subdural hematoma is a collection of blood outside the brain. Subdural hematomas are usually caused by severe head injuries. The bleeding and increased pressure on the brain from a subdural hematoma can be life-threatening. Some subdural hematomas stop and resolve spontaneously; others require surgical drainage. Subdural hematoma occurs not only in patients with severe head injury but also in patients with less severe head injuries, particularly those who are elderly or who are receiving anticoagulants or blood thinners. …show more content…
This results from a slower rate of bleeding, causing a slowly enlarging subdural hematoma.In very slow-growing subdural hematomas, there may be no noticeable symptoms for more than two weeks after the bleeding starts. Acute subdural hematomas are less than 72 hours old and are overly dense compared with the brain on computed tomography scans. The subacute phase begins 3-7 days after acute injury. Acute subdural hematoma is the most common type of traumatic intracranial hematoma. Hernation can be cause by hematoma which is masses that expand within the skull, subdural hematomas may become lethal by increasing pressure within the brain, leading to pathologic shifts of brain tissue (brain herniations). Two common types of brain herniation are subfalcial (cingulate gyrus) herniation and transtentorial (uncal) herniation. Chronic subdural hematomas develop over the course of weeks and are hypodense compared with the brain. However, subdural hematomas may be mixed in nature, such as when acute bleeding has occurred into a chronic subdural hematoma. Chronic subdural hematoma can occur in the elderly after apparently insignificant head trauma. Often, the event is never recognized. Chronic subdural hematoma is commonly associated with cerebral atrophy. Cortical bridging veins are thought to be under greater tension as the brain gradually shrinks from the skull; even minor trauma may cause one of these veins to tear. Slow bleeding from the low-pressure venous system often enables large hematomas to form before clinical signs appear. Chronic subdural hematoma is a common treatable cause of dementia. Spontaneous subdural hematoma is rare. These cases often have an arterial source; they are usually associated with the same pathology as that involved in subarachnoid or intracerebral hemorrhage. The blood from a ruptured aneurysm may dissect through the