How Doctors Diagnose Aneurysmal Subarachnoid Hemorrhage: Tests You Should Know
How Doctors Diagnose Aneurysmal Subarachnoid Hemorrhage: Tests You Should Know
Why It Matters
Diagnosing an SAH quickly is crucial to prevent serious complications. Discover the key tests doctors use to detect this condition.
Contents
- The Role of CT Scans
- Why Lumbar Punctures Are Important
- Advanced Imaging Techniques
The Role of CT Scans
A noncontrast head CT is usually the first test performed when SAH is suspected. This scan can detect bleeding in the brain with high accuracy, especially when done within the first 24 hours of symptom onset.
Why Lumbar Punctures Are Important
If the CT scan is inconclusive, a lumbar puncture may be necessary. This test examines cerebrospinal fluid for signs of bleeding, providing another layer of diagnostic certainty.
Advanced Imaging Techniques
For more detailed imaging, doctors might use CT or MR angiography. These tests provide a closer look at blood vessels to identify aneurysms that might have caused the hemorrhage.
FAQs
What is a head CT scan?
It's an imaging test that checks for brain bleeding.
When is a lumbar puncture needed?
It's needed if a CT scan doesn’t confirm SAH.
What does a CT angiography do?
It visualizes blood vessels to detect aneurysms.
Is MRI used for SAH?
MRI can be used, especially if symptoms are atypical.
Wrapping Up
Diagnostic tests are essential tools in identifying SAH and guiding treatment.
Additional References
- Perry JJ, Stiell IG, Sivilotti ML, et al. Clinical decision rules to rule out subarachnoid hemorrhage for acute headache. JAMA 2013; 310:1248.
- Edlow JA, Malek AM, Ogilvy CS. Aneurysmal subarachnoid hemorrhage: update for emergency physicians. J Emerg Med 2008; 34:237.
This article has been reviewed for accuracy by one of the licensed medical doctors working for Doctronic.