It usually begins forming several days or weeks after bleeding initially starts. Bleeding is usually due to a head injury. When it does, it generally requires surgical treatment. Major or minor trauma to the brain from a head injury is the most common cause of a chronic SDH. In rare cases, one may form due to unknown reasons, unrelated to injury. When they break, blood leaks over a long time and forms a clot.
The clot puts increasing pressure on your brain. Brain tissue shrinks as part of the normal aging process. Shrinking stretches and weakens veins, so even a minor head injury may cause a chronic SDH. Heavy drinking for several years is another factor that increases your risk for chronic SDH. Other factors include using blood-thinning medications, aspirin, and anti-inflammatory medications for a long time.
The exact symptoms that appear depend on the location and size of your hematoma. Some symptoms occur more often than others. Up to 80 percent of people with this type of hematoma have headaches. If your clot is large, loss of the ability to move paralysis can occur. You might also become unconscious and slip into a coma. A chronic SDH that puts severe pressure on the brain can cause permanent brain damage and even death. People who have seizures or lose consciousness need emergency care.
Your doctor will conduct a physical exam to look for signs of damage to your nervous system, including:. Symptoms of this condition are like symptoms of several other disorders and illnesses that affect the brain, such as:. Tests like magnetic resonance imaging MRI and computed tomography CT can lead to a more accurate diagnosis. An MRI uses radio waves and a magnetic field to produce images of your organs. A CT scan uses several X-rays to make cross-sectional pictures of bones and soft structures in your body.
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Synchronous Digital Hiarchy Miscellaneous » Unclassified. Subdural Haematoma Medical. Subtitle for Deaf and Hard Miscellaneous » Unclassified. Social Determinants of Health Medical » Healthcare. Even those who survive may never fully regain functioning. Good outcomes are seen in less than one third of patients. Younger patients tend to have better outcomes compared to older individuals.
However, the ultimate prognosis depends on the cause and extent of the parenchymal brain injury [ 12 ]. Front Neurol. Korean J Neurotrauma. Jayawant S, Parr J ; Outcome following subdural haemorrhages in infancy. Arch Dis Child. Squier W ; Shaken baby syndrome: the quest for evidence. Dev Med Child Neurol. Neurol Med Chir Tokyo. Epub Jun J Korean Neurosurg Soc. Epub Sep J Clin Neurosci. PLoS One. Asian J Neurosurg. De Souza M, Moncure M, Lansford T, et al ; Nonoperative management of epidural hematomas and subdural hematomas: is it safe in lesions measuring one centimeter or less?
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