Concussion Symptoms and Testing
How Do Emergency Doctors Determine Concussion Risk?
The Canadian Head CT Rules came out the winner when they were compared with the New Orleans rules (even medical decision-making rules can compete against each other). There are five "high risk" and two "medium risk" signs that can predict whether bleeding exists in the brain that will require an operation:
- High risk: The person is not neurologically normal after 2 hours, has a depressed skull fracture, has a fracture of the base of the skull, has vomited more than twice, or is older than 65.
- Medium risk: The person has had more than 30 minutes of amnesia, or the injury occurred as a result of a dangerous mechanism like being thrown from a car.