Which test is used to reduce the hip in cases of hip dysplasia?

The Ortolani test is specifically designed to detect and potentially reduce a dislocated hip in infants with developmental dysplasia of the hip. During this test, the examiner gently abducts the hip while applying anterior force to the femur, which can clinically "click" the hip back into place if it is dislocated. This test assesses for congenital hip dislocation, identifying whether the femoral head is dislocated or reducible within the acetabulum.

In contrast, the Barlow test is aimed primarily at detecting a dislocatable hip, while the Fabere test assesses hip mobility and possible hip pathologies, such as arthritis, and the Trendelenburg test helps evaluate hip stability and gluteal muscle strength rather than hip reduction. Thus, the Ortolani test stands out as the appropriate maneuver for reducing the hip in cases of hip dysplasia.