The Gillet test, also known as the Marching Test or Sacral Fixation Test, is used to assess sacroiliac joint (SIJ) dysfunction, specifically to identify a "blocked" or restricted SIJ.
Understanding the Gillet Test
The Gillet Test aims to determine if the sacroiliac joint is moving properly during leg movement. A positive test indicates restricted movement of the SIJ, suggesting dysfunction.
How the Gillet Test is Performed
During the test, the patient typically stands while the examiner palpates the sacral sulcus (the groove beside the sacrum) and the posterior superior iliac spine (PSIS) on the side of the leg being tested. The patient then raises one knee towards their chest (hip flexion).
- Normal Response: The PSIS should drop inferiorly (downward) relative to the sacrum.
- Positive Test (SIJ Dysfunction): The PSIS does not drop or moves minimally, indicating restricted movement or "fixation" of the SIJ.
Interpretation of Results
A positive Gillet Test suggests a potential issue with the mechanics of the sacroiliac joint. It's important to note that the Gillet test, like many orthopedic tests, should be used in conjunction with other examination findings and patient history to arrive at a diagnosis.
Limitations
It's also important to understand the limitations of the Gillet Test. Some studies have questioned its reliability and validity as a standalone diagnostic tool. False positives and negatives can occur. Therefore, clinical judgment and a comprehensive assessment are crucial.
