Is the VBI test considered a validated diagnostic tool for dissection?

• A. Yes, it is validated
• B. No, it cannot rule out dissection
• C. It is only valid in certain populations
• D. Yes, it is highly accurate

Answer: (B)

The VBI (Vertebrobasilar Insufficiency) test is not considered a validated diagnostic tool for ruling out dissection. Although it can be used as part of the clinical assessment for patients with possible vertebrobasilar insufficiency or other cervical artery disorders, its ability to definitively exclude a dissection is limited.

The test can indicate the presence of vascular insufficiency but does not directly diagnose dissection, which often requires imaging studies for confirmation. Thus, while the VBI test may provide useful clinical information, its lack of specificity in ruling out dissection makes it unreliable as a stand-alone diagnostic measure. This understanding is critical for clinicians when assessing patients with potential risks for cervical artery dissection.