The diagnosis of dislocation is based on the circumstances of occurrence of the accident and the analysis of the symptoms presented by the patient. The affected joint is deformed, very painful and movements are impossible (functional impotence). Despite these very telling symptoms, further explorations are needed. The radios make it possible to detect a possible concomitant fracture. Other examinations such as ultrasound or MRI or CT scan appreciate the tissue and ligament lesions that accompany any dislocation. Because a dislocation may compress, alter or even tear some elements located in the joint (ligaments, vessels, nerves ...).
There is a special case of dislocation. It is the congenital dislocation of the hip (which affects some infants). This is a relatively common pathology that varies by region and country. It would involve between 6 to 20 children per thousand births. There is a lack of interlocking of the hip. The femoral head of the baby's leg is not properly inserted into the acetabulum and may dislocate. Today, doctors routinely screen hip dislocation infants by performing a clinical examination, plus an X-ray or ultrasound if necessary.
If no screening is undertaken, and there is dislocation of the hip, the child will suffer from symptoms such as: gait disorders, lameness, impotence that may be major, etc.