Portuguese, Hematoma intracraniano epidural, Hematoma epidural, Hematoma epidural intracraniano, Hemorragia epidural, Hematoma extradural, Hematoma. English Translation, Synonyms, Definitions and Usage Examples of Spanish Word ‘hemorragia extradural’. Trauma to be brain can be associated with both epidural and subdural hematomas, among other injuries. Epidural bleeding occurs between.
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Extradural hematoma EDHalso known as an epidural hematomais a collection of blood that forms between the inner surface of the skull and outer layer of the durawhich is called the endosteal layer. They are usually associated with a history of head trauma and frequently associated skull fracture. The source of bleeding is usually arterial, most commonly from a torn middle meningeal artery.
EDHs hemorraagia typically biconvex in shape extradral can cause a mass effect with herniation. They are usually limited by cranial sutures, but not by venous sinuses.
Epidural hematoma – Wikipedia
When the blood clot is evacuated promptly or treated conservatively when smallthe prognosis of EDHs is generally good. Intracranial venous extradural hemorrhages and spinal epidural hemorrhages are discussed separately.
Typically extradural hematomas are seen in young patients hejorragia have sustained head trauma, usually with an associated skull fracture.
Unlike subdural hemorrhagesin which a history of head trauma is often difficult to clearly identify, extradural hemorrhages usually are precipitated by clearly defined head trauma. A typical presentation is of a young patient involved in a head strike either during sport or a result of a motor vehicle accident who may or may not lose consciousness hemorragua.
Following the injury, they regain a normal level of consciousness lucid intervalbut usually, have an ongoing and often severe headache. Over the next few hours, they gradually lose consciousness.
Pain often severe headache is caused by the stripping of dura from the bone by the expanding hemorrhage. The posterior fossa is a rare location for traumatic injury, in general, including EDH Occasionally, an EDH can form due to venous blood, typically a torn sinus with an associated fracture: Young patients being affected is not only a result of the prevalent demographics of patients with a head injury but also relates to the changes that occur in the dura in older patients, as the dura is much more adherent to the inner surface of the skull.
It is important to realise that in the setting of sutural diastasis extradural hematomas can cross sutures, as the continuation of the parietal periosteal component of the dura through the suture – which usually limits spread – is likely also to be disrupted.
Special he,orragia to consider, particularly those related to venous extradural bleedinginclude:. The morphology of extradural hematomas is best understood by reviewing their relationship to the bone and dura. 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.
As a result, EDHs are usually limited in their extent extradurap the cranial sutures, as the periosteum crosses through the suture continuous with the outer periosteal layer. This is therefore helpful in distinguishing EDHs from subdural hematomaswhich are not limited by sutures. Extradural hemorrhages can, however, cross and elevate venous sinuses as long as there is no suture there; after all a venous sinus is located between the parietal and visceral layer of the dura. Unfortunately, these rules are not foolproof and not infrequently extradural hematomas do cross sutures.
This occurs in many scenarios:. In almost all cases, extradural hematomas are seen on CT scans of the brain. They are typically bi-convex or lentiform in shape, extgadural most frequently beneath the squamous part of the temporal bone. EDHs are hyperdense, somewhat heterogeneous, and sharply demarcated. Depending on their size, secondary features of mass effect e.
Postcontrast extravasation may be seen rarely in case of acute EDH and peripheral enhancement due to granulation and neovascularisation can be seen in chronic EDH. MRI can clearly demonstrate the displaced dura hemorragis appears as a hypointense line on T1 and T2 sequences which is helpful in distinguishing it from a subdural hematoma.
Acute EDH appears isointense on T1 and shows variable intensities from hypo- to hyperintense on a T2 sequence. Intravenous contrast may demonstrate displaced or occluded venous sinus in case of the venous origin of EDH.
It can be used to evaluate nontraumatic cause i. Rarely angiography can demonstrate middle meningeal artery laceration and contrast extravasation from the middle meningeal artery into paired middle meningeal veins known as “tram track sign”. Prognosis, even with a relatively large hematoma, is in general quite good, as long as the clot is evacuated promptly. A smaller hematoma without mass effect or swirl sign can be treated conservatively 2sometimes resulting in calcification of the dura.
Occasionally late complications are encountered, usually relating to the injured meningeal vessel. With large hematomas, there is rarely significant confusion as to the correct diagnosis. In smaller lesions, especially when there is associated parenchymal injury e. To quiz yourself on this hemorravia, log in to see multiple choice questions.
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Extradural haemorrhage | Radiology Reference Article |
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Case 3 Case 3. EDH crossing the suture line Case 6: EDH crossing the suture line. Case 7 Case 7. EDH lifting transverse sinus Case 8: EDH lifting transverse sinus. Case 10 Case Case 12 Case Case 13 Case Case 14 Case Case 15 Case Case 16 Case Case 17 Case Case 18 Case Subdural hemorrhage Subdural hemorrhage.
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