How long does it take for neurologic deterioration to occur after a subacute subdural hematoma?

• A. Within hours
• B. Within a few days
• C. 48 hours to 2 weeks
• D. Over a month

Answer: (C)

Following a subacute subdural hematoma, neurologic deterioration typically occurs within a time frame of 48 hours to 2 weeks. This time frame reflects the gradual accumulation of blood in the subdural space, which can lead to increased intracranial pressure and neurological deficits as the hematoma expands.

In a subacute phase, the body is starting to react to the bleed, and symptoms might not be immediately apparent. Instead, there is a progressive onset of symptoms as the hematoma matures. This can include confusion, headache, or changes in consciousness, which may develop as the pressure from the expanding hematoma affects brain function.

In contrast, the rapid deterioration often seen with acute hematomas occurs within hours due to immediate injury and pressure. Longer time frames, such as those extending over a month, are generally associated with chronic conditions or less acute presentations, which would not apply to the typical progression observed in subacute subdural hematomas.