What hematoma has a Biconvex shape?
Extradural hematoma. 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.
What is the shape of epidural hematoma?
Epidural hematomas usually appear convex in shape because their expansion stops at the skull’s sutures, where the dura mater is tightly attached to the skull. Thus, they expand inward toward the brain rather than along the inside of the skull, as occurs in subdural hematomas.
Which hematoma is crescent shaped?
Subdural hematomas are recognized by their crescent shape overlying and compressing the brain.
What is the difference between extradural and subdural hematoma?
Extradural haematoma (EDH) is a blood clot that forms on the outside of the natural covering of the brain (‘dura mater’), while acute subdural haematoma (ASDH) refers to a blood clot on the inner surface of the dura that appears within the first few days of head injury.
What is the difference between epidural hematoma and subdural hematoma?
Epidural hematomas are usually caused by bleeding from the middle meningeal artery, while subdural hematomas are usually due to bleeding from veins that drain blood away from the surface of the brain. The amount of bleeding that occurs also differs in these hematomas.
What is the difference between a subarachnoid hemorrhage and a subdural hematoma?
“Perimesencephalic” SAH refers to scant subarachnoid blood around the brainstem (2) and is related to venous bleeding (3). Subdural hematomas are generally due to tearing of cortical veins, whereas epidural hematomas are typically due to arterial lacerations.
How do you describe an epidural hemorrhage?
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.
How do you know if you have an epidural hematoma?
Headache (severe) Head injury or trauma followed by loss of consciousness, a period of alertness, then rapid deterioration back to unconsciousness. Nausea or vomiting. Weakness in part of the body, usually on the opposite side from the side with the enlarged pupil.
What is the difference between subdural hematoma and subdural hemorrhage?
This space is called the subdural space because it is below the dura. Bleeding into this space is called a subdural hemorrhage. Other names for subdural hematoma are subdural hemorrhage or intracranial hematoma. More broadly, it is also a type of traumatic brain injury (TBI).
How can you tell the difference between a subdural hematoma and an epidural CT?
Subdural hematomas are concave toward the brain and unlimited by suture lines, as opposed to epidural hematomas, which are convex toward the brain and restricted by suture lines. Rarely, a subdural hematoma appears lens shaped (ie, more like an epidural hematoma).
How can you tell the difference between an epidural and a subdural hematoma?
Patients with an epidural hematoma can remain conscious with minimal symptoms, can become drowsy, or can progress to a coma immediately following their injury based on the size of the hematoma. A subdural hematoma occurs when the bleeding exists inside the dura, but still outside the brain.
Which is worse a subdural hematoma or an epidural hematoma?
Because of associated brain injuries and complications of secondary injury, the outcome of subdural hematoma is worse than that of epidural hematoma in children. Surgical intervention may be necessary, especially with large subdural hematomas causing a mass effect.
How to recognize acute subdural hematoma on brain computed?
The attenuation of an acute subdural hematoma on a CT image is between the brain cortex and the skull. In other words, an acute subdural hematoma has a higher attenuation than the normal brain due to the clot retraction of the blood products. You can rely on the shape of the blood collection to predict which space it resides in.
What kind of surgery is needed for crescent shaped hemorrhage?
A crescent shaped hemorrhage compressing the brain that does cross suture lines will be noted on CT of the head. Craniotomy and surgical evacuation is required if there is significant pressure effect on the brain.
How to recognize an epidural hematoma on a CT scan?
The shape of the blood collection in the epidural space on CT differs from a subdural hematoma since it will have a biconvex, or lens shape, rather than a crescent moon shape. Figure 7. Coronal brain computed tomography (CT) scan of a right-sided epidural hematoma, highlighting its typical biconvex or lens shape along with a nearby skull fracture.
When does an extradural haematoma cause loss of consciousness?
Patients with a extradural haematoma will mostly present following a history of trauma or of a fall. The classic picture is of an initial loss of consciousness at the time of injury, followed by a lucid period, before further deterioration (albeit this is present in only around 30% cases).