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For example, a patient who injures the base of their thumb might cause a hematoma, which will slowly move all through their finger within a week. Gravity is the main determinant of this process. Hematomas on articulations can reduce mobility of a member and present roughly the same symptoms as a fracture .
A bruise, also known as a contusion, is a type of hematoma of tissue, [3] the most common cause being capillaries damaged by trauma, causing localized bleeding that extravasates into the surrounding interstitial tissues. Most bruises occur close enough to the epidermis such that the bleeding causes a visible discoloration.
Hemorrhagic parenchymal contusions and cerebral microhemorrhages are examples of traumatic intra-axial bleeds. [3] Extra-axial hemorrhage, bleeding that occurs within the skull but outside of the brain tissue, falls into three subtypes: epidural hematoma, subdural hematoma, and subarachnoid hemorrhage. [3]
Generally, symptoms for hematomas are confused speech, difficulty with balance or walking, headaches, lethargy or confusion, nausea or vomiting, numbness, seizures, slurred speech, visual disturbances, and weakness. [42] For example, an athlete who experiences a subdural hematoma will experience loss of consciousness with little or no lucidity.
Traumatic extradural, or epidural hematoma, bleeding between the dura mater and the skull; Traumatic subarachnoid hemorrhage; Cerebral contusion, a bruise of the brain; Concussion, a loss of function due to trauma; Dementia pugilistica, or "punch-drunk syndrome", caused by repetitive head injuries, for example in boxing or other contact sports
For example, if a speech center of the brain such as Broca's area is damaged, problems with speech are common. [citation needed] Focal injuries include the following: Cerebral contusion is a bruise of brain tissue that commonly results from contact of the brain with the inside of the skull. [4]
A subdural hematoma (SDH) is a type of bleeding in which a collection of blood—usually but not always associated with a traumatic brain injury—gathers between the inner layer of the dura mater and the arachnoid mater of the meninges surrounding the brain.
In some circumstances, concussive injury can cause microvascular disruption, hemorrhage, or subdural hematoma. [7] [10] Closed head injury (coup contrecoup) can damage more than the impact sites on the brain, as axon bundles may be torn or twisted, blood vessels may rupture, and elevated intracranial pressure can distort the walls of the ...