Sinusitis laboratory tests

Overview
Several prediction rules have been developed to aid in diagnosis based on the history and physical. The most consistenly identified predictor is the presence of purulent rhinorrhea

When imaging techniques are required for diagnosis CT scanning is the method of choice. If allergies are suspected, allergy testing may be performed

Lab Tests
In suspected cases of chronic or recurrent sinusitis, other tests may include:
 * Allergy testing
 * Blood tests for HIV or other tests for poor immune function
 * Ciliary function tests
 * Nasal cytology
 * Sweat chloride tests for cystic fibrosis