Ankle Sprain in a Patient on Anticoagulation
A 58-year-old man presents 2 days after an inversion ankle injury while stepping off a curb. He has lateral ankle pain, swelling, and difficulty bearing weight. He takes warfarin for atrial fibrillation (INR 2.6 last week) and has type 2 diabetes. On exam he has swelling over the lateral malleolus, tenderness of the anterior talofibular ligament, and pain-limited dorsiflexion to neutral. He can take four steps but limps. He asks for "aggressive massage and manipulation to get the swelling out fast" and wants to return to his weekend hiking group in 2 weeks.
1. What must you screen for before treating, and how does his medical history change your plan?
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Screen for:
- Fracture using the Ottawa Ankle Rules. He has malleolar tenderness and inability to bear weight, so he meets criteria for radiographs; do not assume a sprain.
- Deep vein thrombosis given swelling, immobility, and his risk profile; monitor for calf pain, warmth, and unilateral swelling.
- Anticoagulation status: he is therapeutically anticoagulated, so aggressive massage and manipulation are contraindicated because of bleeding risk.
- Diabetes: consider wound/skin integrity and healing, and monitor for infection if there is any break in the skin.
His request for aggressive manual therapy should be declined with explanation, and his 2-week hiking goal is likely unrealistic.
2. Outline an appropriate early intervention and set expectations for his timeline.
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Early phase:
- Protect and manage load: relative rest, compression, elevation, and a supportive device as needed; avoid aggressive soft-tissue work.
- Pain-guided movement: gentle active range of motion and isometrics within comfort.
- Progressive weight-bearing toward a normal gait pattern.
- Proprioceptive and strengthening progression as pain allows.
Timeline: a lateral ankle sprain typically requires weeks, not days, for return to uneven terrain. Two weeks to hiking is optimistic; set a graded goal (flat walking, then uneven surfaces, then hiking) based on swelling and pain response. Explain that the anticoagulant does not change the ligament injury, but it does change what hands-on techniques are safe. Coordinate with his physician regarding the radiograph results and any medication questions.