Head Injury — GCS and Management

According to the Glasgow Coma Scale, what is the minimum score that defines severe head injury?

A 52-year-old man is brought to the trauma center 30 minutes after a fall from a 15-foot ladder. On arrival, GCS is 8/15 (E2V2M4). He is intubated in the field by paramedics for airway protection. CT head shows a 4 cm acute subdural hematoma with 8 mm midline shift and uncal herniation signs. Blood pressure is 160/95 mmHg, heart rate 58/min, respiratory rate 12/min on mechanical ventilation. What is the most appropriate immediate next step in management?

Which single clinical finding best distinguishes an acute epidural hematoma from an acute subdural hematoma on presentation?

During a trauma audit at a tertiary care centre in Delhi, the neurosurgery team reviewed 150 fatal head injury cases over 2 years. Which is the most common site of intracranial hemorrhage in fatal head injury cases?

A 28-year-old man is brought to the emergency department 2 hours after a motor vehicle collision. On examination, he has a GCS of 8 (E2V2M4) with a blown left pupil and right hemiparesis. Which single finding best distinguishes uncal herniation from diffuse axonal injury as the primary mechanism of his altered consciousness?