Merck Manual

Please confirm that you are a health care professional

honeypot link

Evaluation of the Ankle


Alexandra Villa-Forte

, MD, MPH, Cleveland Clinic

Last full review/revision Feb 2020| Content last modified Feb 2020
Click here for Patient Education
Topic Resources

Physical Examination of the Ankle

The patient is observed walking, but only if there is no serious injury that could be aggravated or complicated by weight bearing.

The ankle is inspected for deformities, swelling, skin discoloration, muscle atrophy, and asymmetry with the opposite side. The lower leg muscles are inspected for atrophy.

Sensation to light touch is tested, at minimum, on the top of the first webbed space and the side of the foot. The dorsalis pedis pulse is palpated over the anterior foot, and the posterior tibial pulse is palpated behind the medial malleolus.

The ankle is gently felt for warmth and to detect subtle swelling. Comparison to the unaffected side is useful. Palpation for tenderness is done over the bones and then the major ligaments. Touching only the bone, and then only the ligament, can help distinguish bony from ligamentous injury.

Laterally, palpation includes the tip of the lateral malleolus, the fibula, and the three lateral ligaments: anterior talofibular, posterior talofibular, and fibulocalcaneal. Because an inversion injury of the ankle can fracture the proximal fibula, the proximal fibula is palpated. The base of the 5th metatarsal is also palpated.

Bones of the foot and ankle

Bones of the ankle and foot

The dome of the talus is palpated if ankle swelling is severe and egg-shaped after an ankle injury.

Medially, palpation includes the tip of the medial malleolus, the tibia, navicular bone, and the medial deltoid ligament complex.

Passive range of motion is tested for dorsiflexion, plantar flexion, eversion (while securing the heel), and inversion (by rotating the heel inward). Active range of motion is tested for dorsiflexion, plantar flexion, and eversion.

After injury, if the patient’s symptoms permit, provocative testing for damage to ligaments and tendons may be done. Instability after ankle sprains, particularly lateral sprains, is assessed by the anterior drawer test. For this test, the examiner stabilizes the patient's lower leg with one hand, puts the other hand under the patient's foot and cups the heel, and pulls the heel anteriorly. If the ligaments are intact, there should be no laxity with anterior stress. To check for tears of the Achilles tendon, the Thompson test is done. For this test, the examiner squeezes the calf muscles while the patient is prone. Absence of the normal plantar flexion with this maneuver suggests a complete or functionally significant tear.

Arthrocentesis of the Ankle

Needle entry occurs just anterior to the medial malleolus and lateral to the tibialis anterior tendon, over the hollow at the anterior aspect of the malleolus. Alternatively, the needle can be inserted just medially to the tibialis anterior tendon. A 25- to 30-gauge needle is used to place a wheal of local anesthetic over the needle entry site. More anesthetic is then injected along the anticipated trajectory of the arthrocentesis needle (about 1 inch [2.54 cm]), but the joint space should not be entered yet. A 1- to 2-inch (2.54 to 5.08 cm), 20-gauge needle is then used to aspirate the joint. The skin is entered perpendicularly and the needle is directed posteriorly into the joint space, with back pressure on the syringe plunger during the advance. Synovial fluid will enter the syringe when the joint is entered. All fluid is drained from the joint. The needle is redirected at a different angle if it hits bone.

Arthrocentesis of the ankle

Synovial fluid is withdrawn from the tibiotalar joint. The patient's foot rests in slight plantar flexion. Needle entry occurs just anterior to the medial malleolus and lateral to the tibialis anterior tendon.

Arthrocentesis of the ankle
Click here for Patient Education
NOTE: This is the Professional Version. CONSUMERS: Click here for the Consumer Version
Professionals also read
Test your knowledge
Herniated Nucleus Pulposus
Herniated nucleus pulposus, or herniated disk, is prolapse of an intervertebral disk through a tear in the surrounding annulus fibrosis. Symptoms of a herniated disk may mimic symptoms of an epidural abscess; therefore, distinguishing between these two conditions is part of the initial history and physical examination. During the examination, which of the following findings is most likely in a patient with an epidural abscess rather than a lumbosacral herniation?
Download the Manuals App iOS ANDROID
Download the Manuals App iOS ANDROID
Download the Manuals App iOS ANDROID

Also of Interest