Foot and ankle examination
Introduction
- Wash hands
- Introduce self
- Ask Patientβs name, DOB and what they like to be called
- Explain examination and obtain consent
- Expose knees and below
- General inspection: patient, e.g. age, pain/discomfort, signs of trauma; around bed, e.g. mobility aids, splint
Look
- Gait: speed, stability, gait cycle phases, limb position/movement; check for normal heel-strike/toe-off
- Deformities of joint/bones/alignment (examine standing)
- Front: hallux deformities(lateral angulation of big toe = hallux valgus), lesser toe deformities (flexed PIP joints = hammer toes; flexed DIP joints = mallet toes; flexed PIP joints and DIP joints with pes cavus = claw toes)
- Sides: foot arches (pes planus = flat foot; pes cavus = high arch, usually with clawed toes)
- Behind: alignment of hindfoot (5Λ valgus normal)
- Tip-toe standing inspection: re-inspect foot arch if there was pes planus (if it corrects on tip-toe standing, it is flexible pes planus; if it does not correct, it is rigid pes planus); observe for big toe flexion (no flexion = hallux rigidus)
Now ask patient to lie down:
- Skin: scars, sinuses, swellings, callosities on heels, nail psoriatic changes, feel up extensor surface of lower leg (psoriasis plaques, rheumatoid nodules, gouty tophi)
- Muscles: wasting, measure calf circumference 10 cm below tibial tuberosity and compare with contralateral side
Toe deformities
Gout
Hallux valgus (bunion)
Feel
Ask about any pain and then start by examining the normal side.
- Skin: palpate general area for temperature and soft tissue swelling/tenderness
- Ligaments: deltoid ligament (anteroinferior to medial malleolus), anterior talofibular ligament (anterior to lateral malleolus), calcaneofibular ligament (inferior to lateral malleolus), and posterior talofibular ligament (posterior to lateral malleolus)
- Bony landmarks β assess joints for tenderness and feel for bony swellings, effusions, synovitis, deformities
- Ankle: medial malleolus, lateral malleolus, anterior joint line
- Hindfoot and midfoot: feel around joints in an βnβ pattern (distolateral β proximolateral β across dorsum β proximomedial β distomedial)
- Forefoot: feel all joints in circle (tarsometatarsal joints, metatarsal heads, MTP joints and IP joints)
- Plantar fascia: feel for thickening, tenderness, fibromatosis
Want to find out how 99% of people passed their exams?
Move
Movements are best assessed with patientβs legs hanging over bed.
- Ankle movements (actively, and passively while feeling for crepitus): dorsiflexion 20Λ and plantar-flexion 40Λ; inversion and eversion at subtalar joint (stabilise ankle with one hand and move heel with the other)
- Midtarsal movements: hold calcaneus with one hand and abduct (10Λ) and adduct (20Λ) forefoot with your other hand
- Toe movements, ask patient to:
- Straighten toes fully (difficulty = joint disease, extensor tendon rupture or neurological damage)
- Curl toes (canβt curl toes in = tendon/small joint involvement)
- Abduct (spread) toes and adduct toes (hold paper between)
- Move MCP joints and IP joints passively (assess for limited movement and crepitus)
Special tests
Tibialis anterior
Foot inversion and dorsiflexion against resistance
Tibialis posterior
Foot inversion and plantar-flexion against resistance
Peroneus longus and brevis
Foot eversion against resistance
Anterior drawer test
Hold calcaneum still and push lower leg posteriorly (tests anterior talofibular ligament)
Syndesmosis test
Squeeze mid-lower leg to test syndesmosis (pain at distal tibia/fibula joint = syndesmosis injury)
Simmondsβ test
Ask patient to kneel on a chair with feet hanging over edge, then squeeze both calves. Feet should plantar-flex (no plantar-flexion = Achilles tendon rupture).
Mulderβs sign
Squeeze metatarsal heads together in horizontal plane with one hand while applying pressure to the interdigital space with other hand (pain Β± Mulderβs click in 2nd/3rd or 3rd/4th webspace = Mortonβs neuroma)
Function
- Balance β stand on one leg (often poor with peroneal weakness/ligament sprains)
To complete
- Thank patient and restore clothing
- βTo complete my examination, I would examine the knees and perform a distal neurovascular examination.β
- Summarise and suggest further investigations you would consider after a full history
Want to find out how 99% of people passed their exams?
Common foot and ankle pathology
Oops! This section is restricted to members. Click here to signup!
Try some questions
What is a foot drop and what are the causes of a foot drop?
Oops! This section is restricted to members. Click here to signup!
You review a patient with an acutely hot swollen and painful first metatarsal phalangeal (MTP) joint. What is your main differential and how would you treat them?
Oops! This section is restricted to members. Click here to signup!
What is plantar fasciitis and how can it be managed?
Oops! This section is restricted to members. Click here to signup!
What are the categories of bones in the foot?
Oops! This section is restricted to members. Click here to signup!
What is Simmondsβs test used to diagnose?
Oops! This section is restricted to members. Click here to signup!
Now try an OSCE station or two
- Foot and ankle exam
- Charcot foot exam
- There’s more here