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Traumatic Brain Injury (TBI) - Causes, Symptoms & Treatment

Traumatic brain injury (TBI) is a brain injury caused by an external force to the head. Depending on severity, consequences range from brief loss of consciousness to permanent neurological damage.

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Things worth knowing about "Traumatic Brain Injury"

Traumatic brain injury (TBI) is a brain injury caused by an external force to the head. Depending on severity, consequences range from brief loss of consciousness to permanent neurological damage.

What is Traumatic Brain Injury?

Traumatic brain injury (TBI) refers to damage to the brain resulting from a direct or indirect external force applied to the head. This can affect brain tissue, blood vessels, or cranial nerves. TBI is one of the most common neurological emergencies worldwide and can affect people of all ages.

Causes

The most common causes of traumatic brain injury include:

Falls: especially common in older adults and young children
Road traffic accidents: including bicycle, motorcycle, and car accidents
Sports injuries: e.g. skiing, football, or contact sports
Physical assault: e.g. blows to the head
Workplace accidents: e.g. falling objects

Severity Levels

TBI is classified into three severity levels using the Glasgow Coma Scale (GCS):

Mild TBI (GCS 13-15): also known as concussion; brief loss of consciousness or confusion may occur, symptoms usually resolve fully
Moderate TBI (GCS 9-12): longer loss of consciousness, more pronounced neurological deficits possible
Severe TBI (GCS 3-8): deep coma, life-threatening conditions, high risk of permanent damage

Symptoms

Symptoms of TBI vary greatly depending on severity. Common signs include:

Headache and dizziness
Nausea and vomiting
Loss of consciousness or confusion
Memory gaps (amnesia)
Vision, hearing, or speech disturbances
Balance problems
Changes in personality or behavior
Seizures

Diagnosis

The diagnosis of TBI is established through a combination of:

Neurological examination: assessment of consciousness, reflexes, and motor skills
Computed tomography (CT scan): standard method for rapid detection of bleeding, fractures, or brain swelling
Magnetic resonance imaging (MRI): more detailed visualization of brain tissue damage, especially in mild TBI
Glasgow Coma Scale: standardized assessment of the level of consciousness

Treatment

Emergency Care

If TBI is suspected, emergency services must be called immediately. Until help arrives, the person should be kept still and monitored. If unconscious but breathing, the recovery position is recommended.

Hospital Treatment

Mild TBI is often treated on an outpatient basis or with short inpatient observation. Moderate and severe TBI require intensive medical care, which may include:

Intensive care monitoring: controlling intracranial pressure, oxygen supply, and circulatory function
Medication: e.g. pain relievers, drugs to reduce intracranial pressure, or antiepileptics
Surgical intervention: e.g. removal of blood clots (hematomas) or decompression of the brain

Rehabilitation

After a severe TBI, a lengthy rehabilitation process is often necessary. This may include physiotherapy, occupational therapy, speech therapy, and neuropsychological therapy to help regain or compensate for lost abilities.

Prevention

Many traumatic brain injuries can be prevented with appropriate protective measures:

Wearing a helmet when cycling, skiing, or participating in other high-risk sports
Using a seatbelt in vehicles
Fall prevention in older adults (e.g. grab bars, non-slip mats)
Safe design of play areas for children

References

World Health Organization (WHO): Traumatic Brain Injury. Available at: https://www.who.int/news-room/fact-sheets/detail/traumatic-brain-injury
Maas AIR et al. - Traumatic brain injury: integrated approaches to improve prevention, clinical care, and research. The Lancet Neurology, 2017;16(12):987-1048.
Centers for Disease Control and Prevention (CDC): Traumatic Brain Injury and Concussion. Available at: https://www.cdc.gov/traumaticbraininjury

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