Coma

Traumatic brain injury (including concussion)

1) Description of the condition (causes and symptoms)

• Definition: A condition in which a temporary or persistent functional disorder of the brain occurs due to an external impact. It spans from mild concussion, in which there is no clear structural damage, to severe traumatic brain injury accompanied by hemorrhage, contusion, or expanding structural damage.
• Causes: Traumatic impacts such as traffic accidents, falls, occupational accidents, sports injuries, and assault. Injuries may be closed (damage within the skull) or open.
• Pathophysiology: The main mechanisms are electrophysiological and metabolic changes in brain tissue caused by impact, nerve fiber injury (diffuse axonal injury), and hemorrhage and cerebral edema caused by blood vessel rupture.
• Main symptoms: Loss of consciousness (temporary or persistent), dizziness, nausea and vomiting, headache, memory impairment, decreased concentration, sensory hypersensitivity, fatigue, coma, seizures, hemiplegia, and others. Symptoms may appear immediately or after several minutes to several hours.

2) Treatment methods and precautions

• Initial treatment (emergency situations)
  • Visit the emergency room immediately if there is decreased consciousness, persistent vomiting, neurological deficits, or suspected cerebral hemorrhage.
  • Check for hemorrhage and contusion using emergency imaging (relatively rapid CT). Emergency surgery (hematoma removal, decompressive craniectomy) is performed when necessary.
  • In severe cases, airway management, mechanical ventilation, intracranial pressure monitoring, and intracranial pressure control with hypertonic solutions (such as mannitol) may be used.
• Medication treatment
  • Pain: Acetaminophen (Tylenol) is recommended. NSAIDs should be used cautiously in the initial period, considering the risk of bleeding.
  • Seizure prevention: Short-term administration of anticonvulsants may be considered when the risk of acute seizures is high.
  • Other: If hemorrhage or coagulation abnormalities are present, correction is performed (blood products, discontinuation of anticoagulants, etc.).
• Nonsurgical management (mild to moderate cases)
  • Stability and rest (avoid cognitive and physical overload), with a gradual resumption of activities (according to the doctor's instructions).
  • Multidisciplinary rehabilitation programs, including cognitive, physical, occupational, and speech therapy.
• Long-term management
  • Neuropsychological evaluation and rehabilitation for changes in concentration, memory, and behavior.
  • Symptom-specific treatment for chronic pain, headache, sleep disorders, depression, and anxiety.
• Precautions and complications
  • Immediate evaluation is necessary even if symptoms are mild for people with recurrent trauma, those taking anticoagulants, older adults, and people with bleeding disorders.
  • Complications: Persistent cognitive impairment (post-traumatic cognitive impairment), chronic headache, post-concussion syndrome (symptoms lasting several weeks to several months), post-traumatic seizures, neurological deficits, and chronic traumatic encephalopathy (with increased risk from repeated injuries).
• Lifestyle management
  • Get sufficient sleep and manage stress, avoid alcohol and drugs, and follow guidance for a gradual return to daily activities and exercise (in consultation with a doctor and the rehabilitation team).

3) Checkpoints before an outpatient visit (items to prepare and information to confirm)

• Items/materials to prepare and submit

  • List of currently used medications (including anticoagulants and antiplatelet agents)
  • Time and circumstances of the accident (direction and force of the impact), and records of the time symptoms began and their progression
  • Copies of previous test results (CT/MRI/neurocognitive testing), if available
  • Symptom diary (record the frequency and severity of headache, dizziness, vomiting, changes in consciousness, etc.)

• Items to check immediately for worsening symptoms

  • Clouded consciousness, persistent/frequent vomiting, facial or limb paralysis, seizures, sudden worsening of severe headache, and respiratory or circulatory instability

• Information useful to provide during the visit

  • Whether alcohol or drugs were involved at the time of the accident, previous neurological diseases or surgical history, and underlying conditions (bleeding disorders, hypertension, diabetes, etc.)

• Example questions—patient record (short questions that can be used during an outpatient visit)

  • When did you receive the impact, and what was the first symptom?
  • Was there a loss of consciousness? How long did it last?
  • What factors (such as sleep or activity) improve or worsen the symptoms?

4) Examples of general questions to ask the doctor

• "What additional tests (CT/MRI/neuropsychological testing) are needed given my current condition?"
• "What medications can be used to relieve pain, and what are their side effects?"
• "When can I safely resume daily activities (driving, returning to work, and exercise)?"
• "When is rehabilitation treatment (physical therapy/cognitive rehabilitation) needed, and what are its goals?"
• "How can future complications (seizures, chronic headache, cognitive decline) be prevented or monitored?"

5) Examples of condition-specific questions

• "Can a concussion (traumatic brain injury) be diagnosed even if there was no loss of consciousness? In my case, what criteria will be used to determine this?"
• "I am taking anticoagulants. How should I manage them after the accident? What are the criteria for going to the emergency room?"

(Note: Even for a minor head injury, observation for 24–48 hours is recommended. Older adults, people taking anticoagulants, and those at risk of bleeding require immediate emergency evaluation.)