No orthopedic coverage for urgent reduction failure or open injury
Vascular injury concern requiring specialist
Discharge criteria
Successful reduction
Normal neurovascular exam
Splint tolerance
Safe non-weight-bearing plan
Reliable follow-up
Follow-up timing
Orthopedics in 3-7 days
Earlier review if significant swelling or skin risk
Treatment
Immediate life-saving interventions
Immediate limb protection bundle
Elevation
Heart level or above
Skin checks if tenting
Remove constrictors
Rings or anklets
Tight footwear
Analgesia escalation
IV opioids titration if severe pain
Regional anesthesia consideration
If open injury
Sterile saline-soaked dressing
Antibiotics pathway
Tetanus pathway
Immobilization and Splinting
Post-reduction immobilization
Splint choice
Posterior short leg plus stirrup
Posterior short leg if swelling severe and stirrup not tolerated
Position targets
Neutral dorsiflexion
Avoid excessive inversion or eversion
Recheck requirements
Neurovascular exam after splint
Pain trend after splint
Weight-bearing status
Non-weight-bearing until orthopedics review
Reduction
Reduction indications
All acute subtalar dislocations
Threatened skin
Neurovascular compromise
Caution triggers
Open dislocation
Antibiotics and tetanus as early as feasible without delaying reduction
Suspected talar neck fracture-dislocation
Gentle technique
Early orthopedics involvement
Analgesia and anesthesia options
Non-opioid adjuncts
Acetaminophen PO or IV
NSAID if no contraindication
Opioid options
Fentanyl IV titration
25-50 micrograms per dose
Repeat every 3-5 minutes to effect
Morphine IV titration
0.05 mg/kg per dose
Repeat every 5-10 minutes to effect
Regional anesthesia options
Popliteal sciatic block
Ultrasound-guided technique per local credentialing
Ankle block
Tibial nerve block
Deep peroneal nerve block
Superficial peroneal nerve block
Sural nerve block
Saphenous nerve block
Procedural sedation pathway
Ketamine IV
1 mg/kg initial dose
Additional 0.25-0.5 mg/kg every 5-10 minutes as needed
Emergence reaction mitigation
Quiet environment
Consider low-dose benzodiazepine only if severe agitation
Propofol IV
0.5-1 mg/kg initial dose
Additional 0.25-0.5 mg/kg every 1-3 minutes to effect
Hypotension readiness
IV fluids bolus if needed
Vasopressor per local protocol if refractory
Technique principles
Patient position
Supine
Knee flexion to relax gastrocnemius-soleus
Traction and countertraction
Longitudinal traction on foot
Countertraction at distal tibia
Deformity exaggeration
Gentle increase in deformity to disengage
Reverse mechanism
Medial dislocation
Eversion with traction
Lateral dislocation
Inversion with traction
Talar head pressure
Direct pressure to guide talonavicular reduction
Reduction endpoint
Audible or palpable clunk possible
Immediate improvement in alignment
Post-reduction requirements
Immediate neurovascular re-check
Pulses
Sensation
Motor
Post-reduction radiographs
Confirm subtalar and talonavicular congruity
Post-reduction CT consideration
Evaluate associated fractures
Evaluate intra-articular fragments
Failed reduction pathway
Common irreducible causes
Talar head buttonholing through extensor retinaculum
Tendon interposition
Posterior tibial tendon
Peroneal tendons
Fracture fragment block
Escalation
Urgent orthopedics for operative reduction
Avoid repeated forceful attempts
Open fracture medications and timing
Open dislocation antibiotic pathway
First-line for open extremity injury
Cefazolin IV 2 g
Repeat every 8 hours
Severe beta-lactam allergy
Clindamycin IV 600-900 mg
Repeat every 8 hours
Gross contamination or farm injury concern
Add gentamicin IV 5 mg/kg once daily per local protocol
Tetanus prophylaxis
Clean minor wound and immunized
Booster if last dose more than 10 years
Dirty wound or open dislocation
Booster if last dose more than 5 years
Tetanus immune globulin if unknown or incomplete immunization
DVT prophylaxis when relevant
VTE risk and prophylaxis planning
Higher risk scenarios
Lower limb immobilization with additional risk factors
Planned surgery
Prior VTE
Active cancer
Prophylaxis alignment with local protocol
Pharmacologic option if indicated and low bleeding risk
Mechanical measures if pharmacologic contraindicated
Documentation
Risk factors
Plan and duration
Special Populations
Pregnancy
Pregnancy considerations
Imaging strategy
Radiographs with shielding when feasible
CT when benefits outweigh risks for fracture detection or surgical planning
Analgesia options
Acetaminophen preferred
NSAID avoidance in later gestation per obstetric guidance
Sedation considerations
Airway edema risk
Aspiration risk mitigation
Obstetric consultation triggers
Viable gestation with significant trauma mechanism
Abdominal pain or bleeding
Geriatric
Older adult considerations
Lower threshold for imaging beyond radiographs
CT for subtle fractures
Skin fragility
Higher blister and necrosis risk
Medication safety
Opioid delirium risk
Renal dosing for NSAID and antibiotics
Mobility planning
Early PT or admission if unsafe non-weight-bearing
Pediatrics
Pediatric considerations
Growth plate risk
Physeal injuries on imaging review
Sedation dosing
Weight-based dosing only
Reduction technique
Gentle sustained traction
Avoid repeated attempts
Nonaccidental trauma consideration
Inconsistent mechanism
Delayed presentation
Background
Epidemiology
Epidemiology overview
Rare injury
Less than 1% of all dislocations reported
Mechanism distribution
High-energy trauma common
Sports mechanisms also reported
Direction distribution
Medial most common pattern reported
Pathophysiology
Anatomy and injury mechanics
Subtalar joint complex
Talocalcaneal joint disruption
Talonavicular joint disruption
Typical mechanism mapping
Inversion producing medial dislocation tendency
Eversion producing lateral dislocation tendency
Soft tissue injury
Interosseous talocalcaneal ligament disruption
Cervical ligament disruption
Deltoid or lateral ligament complex injury possible
Complication mechanisms
Skin necrosis from talar head pressure
Post-traumatic subtalar arthritis from cartilage injury
Stiffness from prolonged immobilization
Therapeutic Considerations
Management rationale
Early reduction
Skin viability preservation
Neurovascular restoration
Cartilage protection by restoring congruity
Post-reduction CT rationale
High associated fracture frequency reported
Intra-articular fragment detection
Immobilization duration balancing
Short-term immobilization for soft tissue healing
Early range of motion to reduce stiffness when stable
Evidence and guideline framing
ACEP Level C framing for emergency reduction based on expert consensus and standard emergency practice
Class I recommendation style framing for emergent reduction when threatened skin or neurovascular compromise present
Patient Discharge Instructions
copy discharge instructions
Discharge instructions set
Diagnosis
Subtalar dislocation reduced and splinted
Splint care
Keep clean and dry
Do not insert objects inside splint
Loosen outer wrap if increasing tightness
Swelling control
Elevation above heart most of the day for 48-72 hours
Ice around splint 15-20 minutes at a time
Activity
Non-weight-bearing
Crutches or walker use
No driving until cleared
Pain plan
Acetaminophen as directed
NSAID as directed if safe
Opioid only if prescribed and needed
Return now for
Increasing pain not controlled
New numbness or tingling
Toes turning blue, pale, or cold
Inability to move toes
Splint feels too tight despite elevation
Wet or damaged splint
Fever
Wound drainage or foul smell
Follow-up
Orthopedics within 3-7 days
Earlier if worsening swelling or skin concerns
References
Evidence-based sources and guidance
Core references
Tintinalli emergency medicine text
Subtalar dislocation reduction and post-reduction imaging guidance
Rockwood and Green fractures in adults
Patterns, complications, and operative indications
AO Surgery Reference
Reduction principles and immobilization strategies
Orthopedic trauma review literature
Reported rates of associated fractures and post-traumatic arthritis
Procedural sedation references
ACEP clinical policy and guidance on procedural sedation in the ED
Monitoring and staffing principles
Adverse event preparedness
Coding references
ICD-10-CM code family S93.3- for dislocation of other and unspecified parts of foot
Final code selection per documentation and laterality
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.