Procedural sedation option when severe pain or concomitant fracture reduction
Cardiorespiratory monitoring
Airway equipment ready
Bag valve mask
Suction
Post reduction requirements
Repeat neurovascular exam
Repeat dynamic testing deferred until swelling improves
Immobilization in stable position
Open fracture medications and timing
Open injury pathway when tendon exposed or wound communicates
Antibiotics timing
First dose as soon as possible
Cefazolin IV for low contamination
If gross contamination or farm exposure
Add aminoglycoside per local protocol
Add anaerobic coverage per local protocol
Tetanus prophylaxis
Booster if not up to date
Immune globulin if unknown or incomplete series with dirty wound
DVT prophylaxis when relevant
Lower limb immobilization risk assessment
High risk features
Prior venous thromboembolism
Active cancer
Prophylaxis decision per local protocol
Low molecular weight heparin option if indicated
Contraindications screening
Special Populations
Pregnancy
Pregnancy considerations
Imaging strategy
Radiographs acceptable with shielding when needed
MRI without gadolinium preferred for soft tissue when required
Analgesia
Acetaminophen preferred
NSAID avoidance in later pregnancy per obstetric guidance
DVT risk
Elevated baseline VTE risk
Lower threshold for prophylaxis discussion
Geriatric
Older adult considerations
Higher fracture likelihood with low energy mechanism
Liberal radiographs
Consider CT if persistent pain with negative X ray
Fall risk
Mobility aid assessment
Home safety planning
Medication risks
NSAID renal and GI risk
Opioid delirium risk
Pediatrics
Pediatric considerations
Growth plate injury screening
Salter Harris patterns around distal fibula
Low threshold for immobilization if tenderness over physis
Imaging
Radiographs first line
MRI or ultrasound for persistent symptoms
Dosing
Weight based analgesia
Avoid aspirin
Background
Epidemiology
Frequency and setting
Uncommon injury
Higher prevalence in athletes
Commonly missed at initial visit
Pathophysiology
Mechanism
Superior peroneal retinaculum tear
Tendon displacement anterior to lateral malleolus
Injury spectrum
Retinaculum sprain
Tendon subluxation
Complete dislocation
Peroneus brevis split tear
Anatomic contributors
Shallow retromalleolar groove
Convex fibular groove
Accessory muscles
Therapeutic Considerations
Acute management goals
Prevent recurrent displacement
Reduce inflammation and pain
Protect retinaculum healing
Nonoperative versus operative concepts
Acute first episode may trial immobilization
Recurrent instability often needs surgical stabilization
Rehab principles
Early swelling control
Gradual range of motion after immobilization period
Progressive peroneal strengthening and proprioception
Patient Discharge Instructions
Copy discharge instructions
Discharge plan
Splint care
Keep clean and dry
Do not insert objects inside
Swelling control
Elevation as much as possible for 48 to 72 hours
Ice over splint if allowed and safe
Weight bearing
Non weight bearing until orthopedics review
Use crutches or walker
Pain medicines
Acetaminophen as directed
NSAID as directed if safe
Return to ED now for
Increasing pain not controlled with meds
New numbness or tingling in foot
Pale or cool toes
Increasing tightness in splint
New weakness of foot or toes
Fever or drainage from wound
Follow up
Orthopedics or sports medicine in 3 to 7 days
Earlier follow up if symptoms worsen
References
Evidence and guidelines
Core references
Orthopedic sports medicine reviews on peroneal tendon instability and superior peroneal retinaculum injury
Nonoperative immobilization as initial option for selected acute cases
Higher recurrence risk with nonoperative care in athletes and recurrent cases
Imaging references for peroneal tendons
MRI for tendon tear and retinaculum disruption characterization
Dynamic ultrasound for real time subluxation confirmation when available
Evidence grading notes
Evidence interpretation
Limited high quality randomized trials for acute peroneal tendon dislocation
Many recommendations based on cohort studies and expert consensus
Class IIa recommendation for early orthopedic evaluation in suspected acute dislocation based on expert consensus
ACEP guidance applicability
No dedicated ACEP guideline for peroneal tendon dislocation
Procedural sedation guidance follows standard ED sedation policies and society guidelines
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.