Diagnosing Sinusitis: When Do You Need Tests?
Diagnosing Sinusitis: When Do You Need Tests?
Beyond the Symptoms
While most sinusitis cases are diagnosed based on symptoms alone, sometimes additional tests are needed. Let's explore when and why testing might be necessary.
Contents
- The Power of Clinical Diagnosis
- When Imaging Comes into Play
- The Role of Bacterial Cultures
The Power of Clinical Diagnosis
For most cases of acute sinusitis, your doctor can make a diagnosis based on your symptoms and a physical exam. They'll look for signs like nasal congestion, facial tenderness, and purulent nasal discharge. This approach is like a detective piecing together clues - your symptoms and physical signs tell the story.
When Imaging Comes into Play
Imaging tests, like CT scans, aren't usually needed for uncomplicated sinusitis. However, they become crucial if complications are suspected. Think of it as looking under the hood when your car's making strange noises. Signs that might prompt imaging include severe headache, vision changes, or swelling around the eyes. These could indicate the infection has spread beyond the sinuses.

The Role of Bacterial Cultures
Bacterial cultures aren't routinely used for diagnosing sinusitis. They're reserved for cases where complications are suspected or antibiotics aren't working. Obtaining a culture is like sending a sample to a lab to identify the exact 'culprit' causing the infection. This helps guide treatment, especially when dealing with antibiotic-resistant bacteria.
FAQs
Do I need a CT scan for sinusitis?
Usually not, unless complications are suspected.
Can blood tests diagnose sinusitis?
They're not typically used for uncomplicated cases.
Is nasal endoscopy used to diagnose sinusitis?
It can be, especially in chronic or complicated cases.
The Diagnostic Journey
While most sinusitis cases are diagnosed clinically, understanding when additional tests are needed ensures appropriate care.
Additional References
- Rosenfeld RM, et al. Clinical practice guideline (update): adult sinusitis. Otolaryngol Head Neck Surg 2015; 152:S1.
- Expert Panel on Neurological Imaging, et al. ACR Appropriateness Criteria® Sinonasal Disease: 2021 Update. J Am Coll Radiol 2022; 19:S175.
This article has been reviewed for accuracy by one of the licensed medical doctors working for Doctronic.