Gillet’s test for the sacroiliac joint involvement:

• This test is also called the ipsilateral posterior rotation test or sacral fixation test.
• This test is applied to the clinic to check the involvement of the sacroiliac joint = SI joint.
• This clinical test is applied by to therapist or doctor when the patient is complaining about pelvic pain.
• This test is applied to the examination part of the assessment of the SI joint pain.

What is the purpose of Gillet’s test?

• This Gillet’s test is used to check the involvement of the SI joint.

How do you perform Gillet’s test?

• While the patient stands, the sitting examiner [ therapist ] palpates the PSIS with one thumb & the other hand parallel with the first thumb on the sacrum.
• The examiner instructs the patient for doing to stand on one leg while pulling the opposite knee up towards the chest.

• This test causes the innominate bone on the same side then to rotate posteriorly.
• Gillet’s test is repeated with the other leg meaning the unaffected side with the palpating of the other PSIS.
• When the sacroiliac joint = SI joint on the side on which the knee joint is flexed moves minimally/up so that this joint is said to be hypermobile,/blocked, this situation is indicating a positive test.

• On the normal side, the test PSIS moves down inferiorly.
• This test is similar to the test performed during hip flexion movement in active movement.
• The only difference is the points of palpation during the movement.

• Jackson has suggested a modification to the test.
• After completing Gillet’s test, he suggests that the examiner [ therapist ] palpate the same PSIS & sacrum.
• Then examiner instructs the patient for doing a repeat of the Gillet test using the other leg, which causes the opposite innominate bone to rotate posteriorly.
• As the patient flexes the hip & knee joints, the lumbar spine beings to flex, causing the sacrum to move inferiorly & resulting in the test innominate rotating anteriorly.