Approximation Test (Sacroiliac Compression Test)
- This test is used to check the Sacroiliac Compression Test/transverse posterior stress test.
- This test is described by Laslett and Williams in 1994.
- This test is a provocation test for the SI joint.
- This test is given to stress on the SIJ structures & the posterior SIJ ligament.
- It is an attempt to replicate the patient’s symptoms.
- This test is applied to the clinic to check the SI joint compression by the doctor or therapist.
- This test is applied when the patient is complain about SI joint pain.
What is the purpose of the Approximation Test?
- This test is used to check the sprain of the sacroiliac joints.
How do you perform the Approximation Test?
- The patient is in the side-lying position for the starting position of the test.
- Then the examiner [ therapist ] is placed over the upper part of the iliac crest, after that pressing toward the floor.
- The movement causes forward pressure on the sacrum.
What is an interpretation of the Approximation Test?
- The positive result of this test = An increased feeling of pressure in the sacroiliac joints means SI joint indicates a possible sacroiliac lesion & a sprain of the posterior sacroiliac ligaments.
- The negative result of this test: If the patient does not feel the pain & pain other than the reproduction of the patient’s pain.
Evidence of the Approximation Test:
Results of the Literature Search:
- A comprehensive literature search is conducted by using the keywords of the searches to compile the content of this test review.
- Articles & papers were written in the language in English only were included in this test.
- The Cochrane Library, PUBMED databases, OVID MEDLINE & Web of Science were used for the search of the material. Keywords of this test like SIJ Compression Test, Reliability & Specificity of SIJ Testing, SIJ Testing which is used & combined with the refining of the search.
