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Tests and diagnosis
By Mayo Clinic staffDuring the physical exam, your doctor will check for points of tenderness. He or she will move the joint in a variety of ways to check your range of motion and to see if any particular position or movement causes pain.
If the injury is severe, your doctor may recommend one or more of the following imaging scans to rule out a broken bone or to more precisely evaluate the soft tissue damage:
- X-ray. During an X-ray, a small amount of radiation passes through your body to produce images of your internal structures. This test is good for evaluating bones, but is less effective at visualizing soft tissues. Tiny cracks or stress fractures in bones may not show up, especially at first, on regular X-rays.
- Bone scan. For a bone scan, a technician will inject a small amount of radioactive material into an intravenous line. The radioactive material is attracted to your bones, especially the parts of your bones that have been damaged. Damaged areas show up as bright spots on an image taken by a scanner. Bone scans are good at detecting stress fractures.
- Computerized tomography (CT). CT scans are useful because they can reveal more detail about the bones of the joint. CT scans take X-rays from many different angles and combine them to make cross-sectional images of internal structures of your body.
- Magnetic resonance imaging (MRI). MRIs use radio waves and a strong magnetic field to produce detailed images of internal structures. This technology is exceptionally good at visualizing soft tissue injuries.
References
- Maughan KL. Ankle sprain. http://uptodate.com/home/index.html. Accessed May 27, 2011.
- Sprained ankle. American Academy of Orthopaedic Surgeons. http://www.orthoinfo.org/topic.cfm?topic=A00150. Accessed May 27, 2011.
- Krabak BJ, et al. Ankle sprain. In: Frontera WR, et al. Essentials of Physical Medicine and Rehabilitation: Musculoskeletal Disorders, Pain, and Rehabilitation. 2nd ed. Philadelphia, Pa.: Saunders Elsevier; 2008. http://www.mdconsult.com/das/book/body/208746819-6/0/1678/0.html. Accessed May 27, 2011.
- Mercier LR. Ankle sprain. In: Ferri FF. Ferri's Clinical Advisor 2011: Instant Diagnosis and Treatment. Philadelphia, Pa.: Mosby Elsevier; 2011. http://www.mdconsult.com/books/about.do?eid=4-u1.0-B978-0-323-05610-6..C2009-0-38600-6--TOP&isbn=978-0-323-05610-6&about=true&uniqId=230100505-53. Accessed May 27, 2011.
- Abu-Laban RB, et al. Ankle and foot. In: Marx JA, et al. Rosen's Emergency Medicine: Concepts and Clinical Practice. 7th ed. Philadelphia, Pa.: Mosby Elsevier; 2010. http://www.mdconsult.com/books/about.do?about=true&eid=4-u1.0-B978-0-323-05472-0..X0001-1--TOP&isbn=978-0-323-05472-0&uniqId=230100505-57. Accessed May 27, 2011.
- Bone X-ray (radiography). Radiological Society of North America. http://www.radiologyinfo.org/en/info.cfm?pg=bonerad. Accessed May 27, 2011.
- General nuclear medicine. Radiological Society of North America. http://www.radiologyinfo.org/en/info.cfm?pg=gennuclear. Accessed May 27, 2011.
- CT: Body. Radiological Society of North America. http://www.radiologyinfo.org/en/info.cfm?pg=bodyct. Accessed May 27, 2011.
- MRI of the musculoskeletal system. Radiological Society of North America. http://www.radiologyinfo.org/en/info.cfm?pg=muscmr. Accessed May 27, 2011.
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