Prolonged posttraumatic unconsciousness: therapeutic assets and liabilities

Area of Science:

• Neuroscience
• Trauma Surgery
• Critical Care Medicine

Background:

• Severe head injury can lead to prolonged coma, indicating a poor prognosis.
• Understanding the incidence and outcomes of prolonged coma is crucial for patient management.
• Post-traumatic unconsciousness lasting over two weeks presents significant clinical challenges.

Purpose of the Study:

• To determine the incidence of prolonged coma (lasting >2 weeks) after severe head injury.
• To analyze the outcomes and recovery patterns in patients experiencing prolonged post-traumatic unconsciousness.
• To evaluate the predictive value of early clinical presentation and recovery steps on long-term outcomes.

Main Methods:

• Retrospective review of 135 cases of post-traumatic unconsciousness exceeding two weeks.
• Analysis of data from patients managed in a neurosurgical intensive care unit over a 10-year period.
• Assessment of patient outcomes at one year post-trauma, including mortality, vegetative state, severe disability, and satisfactory recovery.

Main Results:

• Prolonged coma occurred in 4% of acute traumatic coma patients and 0.6% of all head injury patients.
• One year post-injury, mortality was 30%, 8% were in a vegetative state, 31% had severe disabilities, and 31% recovered satisfactorily.
• Early clinical signs and the timing of neurological function recovery steps showed limited predictive value for outcome.

Conclusions:

• Prolonged coma following severe head injury has a significant incidence and variable outcomes.
• Wakefulness without awareness is a common recovery state and should not be deemed permanent before one year post-injury.
• Current early clinical assessments have limited ability to predict the long-term prognosis of patients with prolonged post-traumatic unconsciousness.