What are three high-risk factors that mandate radiography in the Canadian C-spine rules?
1. Age > 65 years 2. Extremity parasthesis i.e. prickling, itching, crawling, tingling or burning sensation in hands and feet 3. Unusual and dangerous mechanism e.g. Fall from height > 3 feet, high-speed > 100KPH vehicle accident, injury with axial load to head, collision of vehicle with immovable object, ejection from vehicle