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Diagnostic study demonstrates high sensitivity of the Ottawa SAH Rule in emergency acute headache patients, indicating potential to rule out subarachnoid hemorrhage.
Among patients presenting to the emergency department with acute nontraumatic headache that reached maximal intensity within 1 hour and who had normal neurologic examination findings, the Ottawa SAH Rule was highly sensitive for identifying subarachnoid hemorrhage. These findings apply only to patients with these specific clinical characteristics and require additional evaluation in implementation studies before the rule is applied in routine clinical care.
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Perry et al. (2013) studied this question.
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