thunderclap headache การใช้

While thunderclap headache is the characteristic symptom of subarachnoid hemorrhage, less than 10 % of those with concerning symptoms have SAH on investigations.
If the headache is sudden onset ( thunderclap headache ), a computed tomography test to look for a brain bleed ( subarachnoid hemorrhage ) should be done.
In addition to neurological impairment, hemorrhagic strokes usually cause specific symptoms ( for instance, subarachnoid hemorrhage classically causes a severe headache known as a thunderclap headache ) or reveal evidence of a previous head injury.
Therefore, a lumbar puncture ( " spinal tap " ) is recommended to obtain cerebrospinal fluid if someone has symptoms of a subarachnoid hemorrhage ( e . g ., a thunderclap headache, vomiting, dizziness, new-onset seizures, confusion, a decreased level of consciousness or coma, neck stiffness or other signs of meningismus, and signs of sudden elevated intracranial pressure ), but no blood is visible on the CT scan.