باید تصور کنید که وقتی بیماری با ضربه‌ی شدید به سر وارد می‌شه، مغزش ورم می‌کنه که فشار درون جمجمه‌اش را بالا می‌بره. 
You have to imagine that when a patient comes in with a severe head trauma, his brain is swelling and he's increasing his intracranial pressure. 