How do you determine the time window for which to monitor for cerebral edema development in patients with brain injury?

The type of edema definitely matters. The two big categories of cerebral edema include cytotoxic and vasogenic edema. Cytotoxic results from free water accumulation in dying cells from acute brain injury, while vasogenic edema results in disruption of the blood-brain barrier.

The classic teaching is that acute brain injury leading to cytotoxic edema peaks within a 5-7 day window. My experience from ischemic and hemorrhagic strokes tends to support this teaching; however, there are certainly outl...