In this large cohort of over 3,000 patients with suspected SAH, a negative head CT had a negative predictive value of 99.4%, and 100% if the CT was done within 6 hours of headache onset. LP is not necessary in patients with negative head CT and symptom onset within 6 hours of CT (abstract)
Dr. Scheurer is a clinical hospitalist and the Medical Director of Quality and Safety at the Medical University of South Carolina in Charleston, South Carolina, and is Assistant Professor of Medicine. She is a graduate of the University of Tennessee College of Medicine, completed her residency at Duke University, and completed her Masters in Clinical Research at the Medical University of South Carolina. She also serves as the Web Editor and Physician Advisor for the Society of Hospital Medicine.