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Ottawa subarachnoid hemorrhage rule

Indications: - evaulation for subarachnoid hemorrhage Procedure: - age >= 40 years - neck pain or stiffness with limited neck flexion on examination - witnessed loss of consciousness, or onset during exertion - thunderclap headache * Ottawa SAH rule sensitivity 100% with specificity 14% [2]

General

Ottawa rules

References

  1. Perry JJ, Stiell IG, Sivilotti ML et al Clinical decision rules to rule out subarachnoid hemorrhage for acute headache. JAMA. 2013 Sep 25;310(12):1248-55. PMID: 24065011
  2. Perry JJ, Sivilotti MLA, Sutherland J et al. Validation of the Ottawa Subarachnoid Hemorrhage Rule in patients with acute headache. CMAJ 2017 Nov 13; 189:E1379 PMID: 29133539