Related Experiment Video
Updated: May 2, 2026

10:34
Double Direct Injection of Blood into the Cisterna Magna as a Model of Subarachnoid Hemorrhage
Published on: August 30, 2020
11.3K
In nontraumatic acute headache in the ED, the Ottawa and Emerald rules have high sensitivity but low specificity for
1University of Virginia Medical Center, Charlottesville, Virginia, USA (B.L.).
Annals of Internal Medicine
|October 6, 2025
Abstract
Clinical Impact Ratings:
Emergency Med: [Formula: see text] GIM/FP/GP: [Formula: see text] Neurology: [Formula: see text].

