- Goal of section: The reader will understand common causes of acute ankle, knee, shoulder, back injuries, and chronic back pathology injuries, their diagnoses and management.
- 1%–19% of musculoskeletal injuries evaluated in the ED receive proper discharge instructions for optimal management and rehabilitation.
- The mnemonic PRICEMMMS (see treatment section) includes the necessary components for proper care of acute musculoskeletal pain and swelling.
- Sprain: Stretch or tear of a ligament that connects two or more bones (localized tenderness, swelling, ± joint instability over injured ligament)
- Strain: Inflammation and injury to a muscle or tendon
- Acute: Pain less than 3 mo
- Chronic: Pain greater than 3 mo
- Valgus: A force or alignment that results in the joint opening medially
- Varus: A force or alignment that results in the joint opening laterally (opposite of valgus)
- Apophysitis: Inflammation of growth plate (epiphysis under tension at site of tendon insertion)
- Spondylolysis: Stress injury or fracture of pars interarticularis
- Spondylolisthesis: Anterior movement of one vertebrae in relation to adjacent vertebrae
- History: (1) mechanism of injury; (2) degree of functional impairment immediately after injury; (3) a “pop”, snap, or tear (→ fracture or ligament tear); (4) painful locking or catching sensation (→ cartilage tear, loose body, Osteochondritis dissecans (OCD); (5) feeling of instability (→ dislocation or ligament injury); (6) onset and timing of swelling; (7) pain assessment (where, pain scale 0–10, what makes it worse, what makes it better)
- Physical exam
- Inspection: Surface anatomy (alignment, swelling, ecchymoses, or deformity)
- Neurovascular: Document pulses, and determine sensation
- Palpation: Provoke complaint by pressing with fingertips to elicit tenderness
- Range of motion: Active, passive (flexibility), resisted (strength)
- Provocative tests: Special maneuvers or manipulation techniques unique to each body segment (see Tables 1–6; a video demonstration of each exam is available at http://www.sportsmedkids.com)
- Function: Assess patient’s ability to bear weight, stand, walk, toe raise, hop, broad jump, throw
- Inspection: Surface anatomy (alignment, swelling, ecchymoses, or deformity)
- Red flags: Fever; sweating; age <5 yo; local tenderness/warmth/redness; no history of injury; night pain; weight loss; migratory joint pain (SLE, rheumatic fever, HSP, subacute endocarditis, Lyme disease, gonococcal arthritis, viral or Mycoplasma infection, sepsis); elevated WBC, ESR, or CRP (evaluate for septic arthritis or osteomyelitis).
- Radiographic studies
- Two views minimum of entire bone. Add oblique view for foot, ankle, and elbow injuries (foot injuries require weight-bearing views so that a Lisfranc injury is not missed).
- Normal X-ray does not rule out fracture: Consider other views if exam strongly suggests fracture (if in doubt, splint and order follow-up radiographs in 5–10 d).
- Two views minimum of entire bone. Add oblique view for foot, ankle, and elbow injuries (foot injuries require weight-bearing views so that a Lisfranc injury is not missed).
Exam | Potential Injury | Additional Testing/Management | |
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PALPATION (TENDERNESS) | Lateral malleolus |
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Length of fibula |
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Medial malleolus |
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Base fifth MT |
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Navicular bone |
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Medial joint line |
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Anterior joint line |
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Lateral joint line |
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ROM | Dorsiflexion |
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Plantarflexion |
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Plantarflex eversion |
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Plantarflex inversion |
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PROVOCATIVE TESTS | Anterior drawer |
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Passive eversion |
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Passive dorsiflex inversion stress test |
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Passive plantarflex inversion stress test |
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Syndesmosis squeeze OR Passive dorsiflexion external rotation |
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Peroneal tendon subluxation |
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Signs/ Symptoms | Grade I | Grade II | Grade III |
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Ligament tear | Minimal | Partial | Complete |
Loss of function | Minimal | Some | Great |
Pain | Minimal | Moderate | Severe |
Swelling | Minimal | Moderate | Severe |
Ecchymoses | No | Common | Yes |
Weight-bearing | Normal | Partial | None |
Exam | Potential Injury | Additional Testing/Management | |
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PALPATION (TENDERNESS) | Swelling |
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Patella |
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PALPATION (TENDERNESS) | Femoral condyle |
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Medial joint line |
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Lateral joint line |
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Tibial tubercle |
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Pes anserinus bursa |
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Gerdy’s tubercle |
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ROM | Limited flexion |
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Limited extension (+bounce home test) |
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PROVOCATIVE TESTS | Valgus stress: Twice, 0° and 30° |
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Varus stress: Twice, 0° and 30° |
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Anterior drawer |
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Lachman | |||
Posterior drawer |
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PROVOCATIVE TESTS | McMurray/Modified McMurray |
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Bounce home |
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Apprehension test |
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Exam | Potential Injury | Additional Testing/Management | |
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PALPATION (TENDERNESS) | All shoulder evaluations should begin with a head and neck exam to rule out cervical nerve entrapment or radiculopathy to explain pain or weakness. | ||
Clavicle |
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Acromioclavicular joint |
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Scapula |
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Anterior joint line |
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Posterior joint line |
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Long head biceps |
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ROM | Forward flexion: (normal 160°–180°) |
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Extension: (normal 40°–60°) |
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Abduction: (normal 160°–180°) |
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Internal rotation: |
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External rotation : |
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PROVOCATIVE TESTS | Hawkins impingement |
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O’Brien’s |
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Speed’s |
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Cross arm adduction |
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Sulcus sign |
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Apprehension sign |
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Anterior instability | |||
Fowler’s relocation | |||
| Posterior subluxation |
Exam | Potential Injury | Additional Testing/ Management | |
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PALPATION (TENDERNESS) | The ulnar, median, radial, anterior interosseous, and posterior interosseous nerves are all at risk for compression at the elbow; therefore, a full neurological exam is important. | ||
Lateral epicondyle |
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Medial epicondyle |
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Biceps tendon |
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Olecranon |
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Supracondylar |
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Ulna |
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Radial head |
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Radius |
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Capitellum |
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Ulnar gutter |
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ROM | Pain with flexion |
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Pain with extension |
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Pain with supination |
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Pain with pronation |
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PROVOCATIVE TESTS | Valgus stress: Elbow at 15°–30° with arm abducted to 90° |
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Varus stress |
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Pain with:
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Pain with:
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⊕ Tinel’s sign |
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