The Gillet test, also known as the Marching Test or Sacral Fixation Test, is a physical examination technique designed to assess for dysfunction in the sacroiliac joint (SIJ). This test is used to determine if the joint is "blocked" or not moving correctly.
Understanding Sacroiliac Joint Dysfunction
Sacroiliac joint dysfunction refers to a condition where the SIJ does not move as it should. This lack of movement, often described as a "block," can lead to pain and discomfort in the lower back, buttocks, and sometimes even the legs. The Gillet test helps clinicians identify this restriction.
How the Gillet Test is Performed
The Gillet Test involves the following steps:
- Patient Positioning: The patient typically stands with their feet shoulder-width apart.
- Palpation: The examiner places their thumbs on the patient's posterior superior iliac spines (PSIS), which are bony prominences at the back of the pelvis.
- Leg Movement: The patient is asked to lift one leg towards their chest, as if marching.
- Observation: The examiner watches and feels how the PSIS moves during the leg lift.
Interpreting the Results
Here's how to interpret the findings of the Gillet test:
- Normal Result: On the side of the lifted leg, the PSIS should move downwards (inferiorly) and backward (posteriorly). This indicates normal joint movement.
- Positive Result (Dysfunction): If the PSIS on the side of the lifted leg does not move or moves upward (superiorly), it suggests a restriction or blockage in the sacroiliac joint on that side. This is considered a positive test.
- Bilateral Comparison: The test is typically performed on both sides to compare the movements.
Key Takeaways
- The Gillet test helps identify sacroiliac joint dysfunction.
- It assesses the movement of the PSIS during leg elevation.
- A positive test suggests a blocked or restricted SIJ.
| Test Name | Purpose | Positive Result |
|---|---|---|
| Gillet Test | Detects Sacroiliac Joint (SIJ) dysfunction | PSIS on lifted leg side doesn’t move down |
| Marching Test | Identifies SIJ Restrictions | PSIS moves upwards |
| Sacral Fixation Test | Assesses “blocked” or non-moving SIJ | lack of posterior, inferior movement |
Practical Example
Imagine a patient complaining of lower back pain, which seems to be originating from the left side. During the Gillet test, the examiner notices that the left PSIS does not move downward when the patient lifts their left leg. This is a positive Gillet test, suggesting the patient may have SIJ dysfunction on the left.
