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Multiple Choice

Permissive hypotension is contraindicated or has an exception in which scenario?

The main idea here is that keeping blood pressure deliberately low to limit bleeding (permissive hypotension) can be harmful when the brain is involved. In traumatic brain injury, the brain’s ability to tolerate low perfusion is limited. Lowering blood pressure reduces cerebral perfusion pressure, which can worsen brain ischemia and secondary injury. Because protecting the brain takes priority, permissive hypotension is avoided in head injuries; there’s a special caveat that you should not let the patient become hypotensive and you should actively maintain adequate blood pressure to ensure cerebral perfusion. In other injuries, such as chest or abdominal trauma, permissive hypotension may still be used to minimize ongoing bleeding while definitive control is pursued. But with head injuries, the exception is that you must maintain sufficient blood pressure to support brain perfusion.

The main idea here is that keeping blood pressure deliberately low to limit bleeding (permissive hypotension) can be harmful when the brain is involved. In traumatic brain injury, the brain’s ability to tolerate low perfusion is limited. Lowering blood pressure reduces cerebral perfusion pressure, which can worsen brain ischemia and secondary injury. Because protecting the brain takes priority, permissive hypotension is avoided in head injuries; there’s a special caveat that you should not let the patient become hypotensive and you should actively maintain adequate blood pressure to ensure cerebral perfusion.

In other injuries, such as chest or abdominal trauma, permissive hypotension may still be used to minimize ongoing bleeding while definitive control is pursued. But with head injuries, the exception is that you must maintain sufficient blood pressure to support brain perfusion.