Utility of Red Flags in the Headache Patient in the ED L. Garcia-Castrillo, MD, SEMES Department of Emergency Medicine University Hospital Marques de Valdecilla.

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Presentation transcript:

Utility of Red Flags in the Headache Patient in the ED L. Garcia-Castrillo, MD, SEMES Department of Emergency Medicine University Hospital Marques de Valdecilla Cantabria, Spain

L. Garcia-Castrillo Teaching Points to be Addressed What is the usefulness of the clinical warning criteria (red flags) ? How do we use the information from the critical warning criteria? Is there any special group of patients?

L. Garcia-Castrillo Objectives for HA Patients in ED Identify Secondary HA Rule out life threatening conditions Pain control. Arrange follow up.

L. Garcia-Castrillo Objectives for HA Patients in ED Identify Secondary HA Rule out life threatening conditions Pain control. Arrange follow up.

L. Garcia-Castrillo HA in the ED Final diagnosis HA 1-4% of all cases in ED 20% Secondary HA Only less than 2-4% life threatening 80% Primary HA

How do we rule out life threatening conditions ?

L. Garcia-Castrillo Rule out life threatening conditions Clinical History Neurologic exam Neuroimaging and LP ICP

L. Garcia-Castrillo Red Flags Pain History First,Worst headache, Thunderclap Change in presentation, progressive Awakes during sleep. Trigger by exercise, sexual activity, Valsalva. Localization. Clinical Nausea, vomiting Fever Neurology exam Signs,Symptoms Seizures

L. Garcia-Castrillo Rule out life threatening conditions Clinical History Neurologic exam ICP Neuroimaging, LP Red Flags YES NO Treat, Discharge NO YES

L. Garcia-Castrillo Relevant contributions 1994 Frishberg BM. “The utility of neuroimaging in the evaluation of headache in patients with normal neurologic examinations” Neurology 1994;44: AAN “The utility of Neuroimaging in the Evaluation of patients with normal neurologic examinations” ACEP “Clinical Policy for the initial Approach to adolescents and Adults presenting to the Emergency department with Chief Complaint of Headache” US Headache Consortium “Evidence based Guidelines in Primary care setting: Neuroimaging in non acute Headache” ACEP “Clinical Policy: Critical Issues in the Evaluation and Management of patients Presenting to the Emergency Department with Acute Headache”

L. Garcia-Castrillo Red Flags rentability, limitations What are the study groups Similar to ED population? Selection bias What is the gold Standard Neuroimaging CT, MRI Including LP Including angiography Including follow up

L. Garcia-Castrillo Abnormal Neurolgic exam Authors LR+ 95% CI LR- 95% CI USCHC Ramirez Duarte Frishberg BM. Evidence based Guidelines in Primary Care Setting: Neuroimaging in Patients with Nonacute headache American Academy of Neurology http//

L. Garcia-Castrillo Nausea and Vomiting Authors LR+ 95% CI LR- 95% CI Duarte Ramirez Duarte J. Headache of recent onset in adults: a prospective population-based study. Acta Neurol Scand 1996;94:67-70

L. Garcia-Castrillo Rapidly progressing HA Authors LR+ 95% CI LR- 95% CI Mitchell Ramirez Ramirez-Lassepas M. Predictors of Intracranial Pathologic Findings in Patients Who Seek Emergency Care Because Headache. Arch Neuro. 1997;54:

L. Garcia-Castrillo Awakes from sleep Authors LR+ 95% CI LR- 95% CI Mitchell Mitchell CS. Computed tomography in the headache patient: is routine evaluation really necessary? Headache 1993;33:82-86

L. Garcia-Castrillo Worst HA Authors LR+ 95% CI LR- 95% CI Mitchell Mitchell CS. Computed tomography in the headache patient: is routine evaluation really necessary? Headache 1993;33:82-86

L. Garcia-Castrillo Stiff Neck Authors LR+ 95% CI LR- 95% CI Morgenstern SAH Attia Men Morgenstern LB. Worst Headache and subarachoid Hemorrage: Prospective, modern Computed Tomography and Spinal Fluid Analysis.1998;32: Attia J. Does this Adult patient have acute Meningitis. JAMA 1999;282: ;

L. Garcia-Castrillo HA worsens with Valsalva Authors LR+ 95% CI LR- 95% CI Duarte Duarte J. Headache of recent onset in adults: a prospective population-based study. Acta Neurol Scand 1996;94:67-70

L. Garcia-Castrillo Clinical application LLR+ 3 LLR+ 2,2 LLR- 0,7 Neuroimaging/Lp threshold

L. Garcia-Castrillo Special Groups Age >50 HIV patients

L. Garcia-Castrillo Age over 55 Authors LR+ 95% CI LR- 95% CI Ramirez- Lassepas Ramirez-Lassepas M. Predictors of Intracranial Pathologic Findings in Patients Who Seek Emergency Care Because Headache. Arch Neuro. 1997;54:

L. Garcia-Castrillo HIV infected Patients LR+ Sig. LR- Sig. New HA1.85ns0.78ns Different HA2.26< <0.05 Rothman RE. A decision guideline for Emergency Department Utilization of Noncontrast Head Computed Tomography in HIV- infected Patients. Academic Emergency Medicine 1999;6:

L. Garcia-Castrillo Teaching points to be addressed What is the usefulness of the clinical warning criteria (red flags) ? Neurologic exam, Rapidly progressing, Awakes from sleep, worsens with Valsalva are the most powerful indicators, while nausea, vomiting, stiffness neck and worse headache are less.

L. Garcia-Castrillo Teaching points to be addressed How do we use the information from the critical warning criteria? The diagnostic characteristics of each test allows a formal analysis for the neuroimaging/LP decision

L. Garcia-Castrillo Teaching points to be addressed Is there any special group of patients? Patients over 50 and IHV have higher prevalence of ICP than the normal population and the diagnostic tests have greater power

L. Garcia-Castrillo Summary Clinical history and neurologic exam are the cornerstone of the HA management More high quality research is need to clarify utility of clinical sings. A formal approach helps in the neuroimaging/LP decision

Questions?