What is required for a positive finding in the Fortin Finger Test?

• A. Localization with two fingers
• B. Consistent localization at least once
• C. Localization with one finger, inferomedial to PSIS, and consistency
• D. Immediate localization to multiple areas

Answer: (C)

The requirement for a positive finding in the Fortin Finger Test is the correct identification of the pain location using one finger at a specific spot, which is inferomedial to the posterior superior iliac spine (PSIS), along with demonstrating consistency in this localization. This particular placement is significant because it targets the area that is believed to correspond to the sacroiliac joint, where inflammation or dysfunction may be present.

For the test to be considered positive, the patient's ability to point accurately to that distinct area, and do so consistently on repeated attempts, suggests a strong correlation with sacroiliac joint issues. This specificity helps clinicians ascertain whether symptoms are indeed emanating from that joint or from another source.

The other options do not meet the criteria necessary for a positive finding as defined by the standard for the Fortin Finger Test. For instance, localization with two fingers would not be appropriate as it introduces ambiguity and does not focus on the specificity required for the test. Consistent localization at least once does not provide enough evidence of reliability, which is necessary for clinical assessment. Immediate localization to multiple areas also lacks the precision and consistency focused on specific anatomical landmarks essential for confirming a positive test.