Fortin's test, also known as the Fortin finger test, is a simple and reliable diagnostic tool used to help identify sacroiliac joint (SI joint) dysfunction. It involves asking the patient to point to the area of their pain with one finger.
How to Perform Fortin's Test:
- Position: The patient can be sitting or standing.
- Localization: Have the patient use one finger to pinpoint the location of their pain.
- Positive Result: The test is considered positive if the area of pain is within 1 cm of the posterior superior iliac spine (PSIS), a bony landmark on the back of the pelvis.
Why is Fortin's Test Important?
SI joint dysfunction is a common cause of low back pain, and it can be difficult to diagnose. Fortin's test is a quick and easy way to help clinicians determine if the SI joint is a likely source of the pain. A positive result strongly suggests an SI joint condition.
Examples of Fortin's Test:
- If a patient points to their lower back pain with a finger that is within 1 cm of the PSIS, it is a positive Fortin's test and may indicate SI joint dysfunction.
- If the patient points to a location far from the PSIS, the test is negative and other causes of low back pain should be considered.
Note: While Fortin's test is a helpful tool, it is not a definitive diagnosis. Further assessment, such as imaging or other diagnostic tests, may be necessary to confirm the diagnosis of SI joint dysfunction.
