Ankle dislocationMANAGEMENT

ANKLE · 12 SECTIONS

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590 items

☷ Legend

01Approach to the Critical Patient/attcp59

Time critical priorities

›Immediate priorities

›Hemodynamic instability

›Massive hemorrhage alternative source

›Polytrauma activation criteria

›Limb threat

›Absent dorsalis pedis pulse

›Absent posterior tibial pulse

›Capillary refill delay

›Cool pale foot

›Rapidly progressive pain

›Threatened skin

›Skin blanching over talar dome

›Tenting

›Immediate reduction triggers

›Neurovascular compromise

›Reduction without imaging delay supported by expert consensus

›Post reduction pulse restoration target

›Open dislocation

›Reduction prioritized after antibiotics when feasible without delaying limb salvage

›Irreducible deformity

›Urgent orthopedics

›Monitoring and access

›Continuous pulse oximetry

›Supplemental oxygen for hypoxemia

›Cardiac monitor when sedation planned

›3 lead ECG during procedural sedation

›Non invasive blood pressure cycle

›Every 3 to 5 minutes during sedation

›IV access

›Two large bore for high energy trauma

›Neurovascular documentation

›Pre reduction status

›Motor

›Deep peroneal nerve ankle dorsiflexion

›Superficial peroneal nerve foot eversion

›Tibial nerve great toe plantarflexion

›Sensory

›Deep peroneal first dorsal web space

›Superficial peroneal dorsum of foot

›Sural lateral foot

›Tibial plantar foot

›Vascular

›Dorsalis pedis pulse

›Posterior tibial pulse

›Doppler signal when pulses not palpable

›Post reduction status

›Same nerve and pulse set repeated

›Documentation time stamp

Key concepts

›Clinical frame

›Tibiotalar dislocation usually associated with malleolar fracture

›Pure tibiotalar dislocation without fracture rare

›Estimated 0.065 percent of all ankle injuries

›Estimated 0.46 percent of ankle dislocations

›Concomitant tibiotalar dislocation frequency in ankle fractures

›Reported 21 to 36 percent of ankle fractures

›Time sensitive goals

›Restore perfusion

›Reduce skin necrosis risk

›Restore joint congruity to limit chondral injury

02History/hx42

Mechanism and context

›Injury context

›Mechanism

›High energy motor vehicle collision

›Fall from height

›Sports twisting with plantarflexion inversion

›Time since injury

›Time since deformity noted

›Prior reduction attempts

›Field attempt details

›Open wound concern

›Contamination soil or water

›Baseline function

›Ambulation baseline

›Prior ankle instability

›Risk modifiers

›Diabetes

›Peripheral vascular disease

›Neuropathy

›Tobacco use

›Chronic steroids

›Osteoporosis history

›Medications

›Anticoagulants

›Antiplatelets

Red flags and associated injuries

›Limb threat symptoms

›Numbness

›Distribution mapping

›Weakness

›Foot drop

›Cold foot

›Perfusion change

›Pain out of proportion

›Compartment syndrome concern

›Co injury screen

›Knee pain

›Maisonneuve pattern concern

›Midfoot pain

›Lisfranc concern

›Hindfoot pain

›Subtalar dislocation concern

›Back or head injury symptoms

›Polytrauma pathway

03Physical Exam/exam58

Focused ankle and limb exam

›Inspection

›Deformity direction

›Posterior

›Anterior

›Medial

›Lateral

›Skin integrity

›Open wound

›Blanching

›Tenting

›Fracture blisters

›Swelling pattern

›Rapid expansion

›Palpation

›Medial malleolus tenderness

›Deltoid injury marker

›Lateral malleolus tenderness

›Fibular fracture marker

›Posterior malleolus tenderness

›Posterior malleolar fracture marker

›Proximal fibula tenderness

›Syndesmosis injury marker

›Neurovascular

›Pulses

›Dorsalis pedis

›Posterior tibial

›Perfusion

›Capillary refill

›Skin temperature

›Sensation

›Deep peroneal first dorsal web space

›Superficial peroneal dorsum of foot

›Tibial plantar surface

›Sural lateral foot

›Motor

›Tibialis anterior

›Extensor hallucis longus

›Gastrocnemius soleus

›Tendon checks

›Achilles integrity

›Palpable gap

›Thompson test when tolerated

›Compartment screen

›Pain with passive toe motion

›Deep posterior concern

›Tense compartments

›Leg compartment exam

›Pain trajectory

›Increasing despite immobilization

PITFALLS

›Common misses

›Failure to repeat neurovascular exam after reduction and splinting

›Documentation risk

›Unrecognized syndesmosis injury

›Proximal fibula tenderness

›Overlooking subtalar dislocation

›Hindfoot malalignment

›Underestimating open wound

›Small puncture counts as open until proven otherwise

04Differential Diagnosis/ddx29

Traumatic differentials

›Structural injuries

›Ankle fracture dislocation

›ICD 10 S82 series

›Subtalar dislocation

›ICD 10 S93.3

›Talus fracture

›Talar neck

›Talar body

›Pilon fracture distal tibia

›High energy axial load

›Maisonneuve fracture with syndesmosis injury

›Proximal fibula fracture

›Lisfranc injury

›Midfoot plantar ecchymosis clue

›Soft tissue injuries

›Achilles rupture

›Sudden pop

›Complete deltoid ligament rupture

›Medial clear space widening

Limb threat and complications

›Vascular injury

›Posterior tibial artery injury

›Dorsalis pedis artery injury

›Compartment syndrome leg

›ICD 10 T79.A2

›Nerve injury

›Common peroneal neuropraxia

›Tibial nerve injury

›Infection risk

›Open joint contamination

05Laboratory Tests/lt22

Minimal labs for isolated closed injury

›Lab strategy

›No routine labs when isolated closed dislocation and stable

›Shared decision based on sedation need

Labs when indicated

›Procedural sedation pathway

›Point of care glucose for altered mental status risk

›Hypoglycemia exclusion

›Pregnancy test when applicable

›Imaging planning

›Open injury or operative pathway

›Complete blood count for infection baseline and anemia

›Leukocytosis limited specificity in acute trauma

›Basic metabolic panel for renal function and electrolytes

›Contrast readiness if CT angiography considered

›Coagulation studies for anticoagulant use or bleeding concern

›INR goal context for reversal planning

›Type and screen for major trauma

›Massive transfusion readiness

›Rhabdomyolysis or crush concern

›Creatine kinase

›Trend for compartment syndrome adjunct

›Creatinine and potassium

›Acute kidney injury risk

06Diagnostic Tests/dt57

Scoring Systems

›Classification and decision support

›Gustilo Anderson open fracture classification when associated fracture and open wound

›Type I wound less than 1 cm clean

›Type II wound 1 to 10 cm without extensive soft tissue damage

›Type IIIA extensive soft tissue laceration with adequate coverage

›Type IIIB extensive soft tissue loss with periosteal stripping

›Type IIIC arterial injury requiring repair

›Danis Weber fibular fracture pattern when fracture dislocation present

›Type A below syndesmosis

›Type B at syndesmosis

›Type C above syndesmosis

›Lauge Hansen mechanism patterns when fracture pattern present

›Supination external rotation

›Pronation external rotation

›Supination adduction

›Pronation abduction

›Open dislocation risk frame

›Higher infection risk with gross contamination

›Orthoplastic involvement triggers for large soft tissue loss

Radiographs

›Imaging set

›Ankle 3 view series

›AP

›Lateral

›Mortise

›Tibia fibula full length when syndesmosis injury suspected

›Proximal fibula fracture detection

›Foot series when midfoot pain

›Lisfranc concern

›Post reduction radiographs mandatory

›Confirm congruent tibiotalar joint

›Confirm fracture alignment

›Imaging delay exception

›Neurovascular compromise

›Reduction not delayed for x ray per NCBI Bookshelf StatPearls

MRI

›Soft tissue and occult injury

›Persistent pain with normal radiographs

›Osteochondral lesion talar dome

›Suspected syndesmotic disruption with equivocal x ray

›Ligament complex delineation

›Chronic instability planning

›ATFL CFL assessment

›Contraindications

›Non MRI compatible implanted device

›Timing

›Typically outpatient after acute stabilization

›Advanced imaging indications

›Intra articular fracture suspicion

›Pilon fracture pattern

›Talar fracture suspicion

›Subtle talar body fracture

›Post reduction incongruity on x ray

›Entrapped fragment

›Vascular injury concern

›CT angiography lower extremity

›Absent pulses after reduction

›Surgical planning

›Comminution mapping

07Disposition/dispo42

ED disposition pathways

›Discharge criteria

›Successful reduction

›Stable mortise on post reduction imaging

›Intact neurovascular exam

›Pain controlled with oral regimen

›No escalating opioid requirement

›Safe mobility

›Crutches or walker training

›Non weight bearing plan

›Reliable follow up

›Orthopedics within 24 to 72 hours for fracture dislocation

›Admission criteria

›Open dislocation

›IV antibiotics ongoing

›OR debridement planning

›Neurovascular compromise

›Persistent pulse deficit

›Irreducible dislocation

›Operative reduction requirement

›Unstable fracture pattern

›Trimalleolar fracture dislocation

›Compartment syndrome concern

›Serial exams or pressure monitoring

›Inability to mobilize safely

›Social support limitations

›Transfer criteria

›Vascular repair capability needed

›Suspected Type IIIC open fracture

›Orthoplastic requirement

›Large soft tissue loss

›Pediatric growth plate complexity

›Pediatric ortho availability

Follow up and immobilization plan

›Follow up timing

›Fracture dislocation

›Orthopedics 24 to 72 hours

›Pure dislocation after stable reduction

›Orthopedics 3 to 7 days

›Activity status

›Non weight bearing until specialist review

›Exceptions only per orthopedics

›Elevation plan

›Above heart as much as possible first 48 to 72 hours

08Treatment/t154

Immediate life-saving interventions

›Limb salvage priorities

›If pulseless foot then immediate reduction

›If pulses not restored then vascular surgery escalation

›If hard signs of vascular injury then CT angiography or OR per local protocol

›If open dislocation then antibiotics and tetanus pathway without delaying reduction

›Sterile saline soaked dressing

›Gross contamination control

›If compartment syndrome concern then emergent ortho consultation

›Fasciotomy readiness

›Pain control and sedation readiness

›Airway risk screen

›ASA class

›Difficult airway predictors

›Monitoring setup for sedation

›Capnography adjunct

›ACEP procedural sedation clinical policy Level B capnography may detect hypoventilation earlier

›Fasting status

›ACEP procedural sedation clinical policy Level B no delay based on fasting time

Immobilization and Splinting

›Splint selection

›Posterior short leg plus stirrup for most ankle dislocations after reduction

›Neutral dorsiflexion position

›Posterior short leg alone when stirrup not available

›Added padding over malleoli

›Posterior long leg when instability persists

›Knee flexion to relax gastrocnemius

›Immobilization principles

›Swelling phase avoidance of circumferential cast

›Compartment and skin risk

›Elevation and ice adjunct

›Neurovascular recheck after elevation

›Post splint neurovascular reassessment

›Motor sensory pulses documented

›Splint complications mitigation

›Two finger tightness check at proximal and distal wrap

›Loosen and rewrap if pain increases

›Pressure point prevention

›Extra padding at malleoli and heel

Reduction

›Indications for reduction

›Neurovascular compromise

›Immediate attempt without imaging delay

›Threatened skin

›Blanching and tenting resolution target

›Fracture dislocation

›Articular congruity restoration target

›Contraindications or caution triggers

›Suspected vascular injury with hard signs

›Parallel vascular surgery activation

›Suspected physeal injury

›Gentle technique

›Vertical medial malleolus fracture pattern

›Higher failure risk with some maneuvers

›Analgesia and anesthesia options

›Non opioid adjuncts

›Acetaminophen PO 1000 mg once

›Ibuprofen PO 400 mg once

›Opioid titration

›Fentanyl IV 0.5 to 1 mcg per kg

›Repeat 0.5 mcg per kg every 5 minutes as needed

›Hold for hypoventilation

›Regional anesthesia

›Intra articular tibiotalar block

›Lidocaine 1 percent 10 mL

›Aspiration for hemarthrosis before injection

›Popliteal sciatic block when trained personnel available

›Ultrasound guidance

›Procedural sedation

›Ketamine IV 1 to 2 mg per kg

›Supplemental dose 0.5 mg per kg

›Repeat every 5 to 10 minutes as needed

›Propofol IV 0.5 to 1 mg per kg

›Supplemental dose 0.25 to 0.5 mg per kg

›Repeat every 2 to 3 minutes as needed

›Etomidate IV 0.1 to 0.2 mg per kg

›Limited analgesia

›Pair with opioid if needed

›Monitoring

›Continuous capnography

›ACEP Level B recommendation for adjunct monitoring during ED procedural sedation

›Immediate airway equipment available

›Bag valve mask

›Suction

›Oral airway

›Endotracheal intubation setup

›Technique principles

›Traction and countertraction

›Inline longitudinal traction on foot

›Countertraction at distal tibia

›Deformity exaggeration then reverse

›Disengage talus from mortise

›Posterior dislocation common pattern

›Plantarflexion relief with dorsiflexion during traction

›Gentle sustained force

›Avoid repeated forceful attempts

›Post reduction requirements

›Immediate neurovascular recheck

›Pulses and Doppler if needed

›Post reduction imaging

›Mortise congruity

›Immobilization in stable position

›Posterior short leg plus stirrup

›If persistent instability then urgent orthopedics

›Temporary external fixation consideration

›Failed reduction pathway

›If irreducible then urgent orthopedics

›Interposed tendon or fracture fragment concern

›If persistent pulse deficit after reduction then vascular escalation

›CT angiography consideration

›If increasing pain and tense compartments then compartment syndrome escalation

›Emergent fasciotomy pathway

Open fracture medications and timing

›Open injury pathway

›Antibiotics timing

›IV prophylactic antibiotics as soon as possible

›Ideally within 1 hour of injury per BOAST 4

›Within 1 hour of presentation strongly recommended per ACS TQIP orthopedic trauma guidelines

›Antibiotic selection examples

›Gustilo type I or II

›Cefazolin IV 2 g

›Repeat every 8 hours

›Gustilo type III or gross contamination

›Cefazolin IV 2 g

›Gentamicin IV 5 mg per kg once daily

›Severe beta lactam allergy

›Clindamycin IV 900 mg

›Repeat every 8 hours

›Farm soil or fecal contamination concern

›Add penicillin G IV 4 million units

›Repeat every 4 hours

›Tetanus prophylaxis

›Unknown or incomplete immunization

›Tetanus vaccine

›Tetanus immune globulin for high risk wound

›Up to date immunization

›Booster based on wound type and time since last dose

›Wound handling

›Sterile saline soaked dressing

›Avoid aggressive ED irrigation when definitive OR planned

›Reduce and splint after dressing when feasible

›Operative timing frame

›Debridement and irrigation as soon as reasonable

›Ideally before 24 hours per AAOS major extremity trauma surgical site infection guideline

DVT prophylaxis when relevant

›Risk assessment

›Lower limb immobilization

›Prolonged non weight bearing

›Additional risk factors

›Prior venous thromboembolism

›Active cancer

›Estrogen therapy

›Obesity

›Strategy alignment

›Local protocol based on fracture pattern and operative plan

›Ortho directed prophylaxis preferred

›Contraindications

›Active bleeding

›High bleeding risk

09Special Populations/sp33

Pregnancy

›Pregnancy considerations

›Imaging choice

›Radiographs acceptable when indicated

›Abdominal shielding when feasible

›Analgesia selection

›Acetaminophen preferred

›NSAID avoidance in later pregnancy

›Sedation considerations

›Aspiration risk higher

›Left lateral tilt positioning when feasible

›Obstetric coordination

›Viable gestation fetal monitoring per local protocol

Geriatric

›Geriatric considerations

›Fragility mechanism

›Low energy twist common in ankle fractures

›Skin and soft tissue fragility

›Higher blister and necrosis risk

›Delirium risk with opioids and sedation

›Lowest effective dose strategy

›Mobility and discharge planning

›Higher admission threshold when unsafe non weight bearing

Pediatrics

›Pediatric considerations

›Physeal injury risk

›Salter Harris patterns with ankle trauma

›Reduction technique

›Gentle traction

›Avoid repeated attempts

›Analgesia dosing weight based

›Ketamine IV 1 to 2 mg per kg

›Fentanyl IV 1 mcg per kg

›Non accidental trauma screen when appropriate

›Inconsistent history

›Multiple injuries

10Background/b47

Epidemiology

›Frequency and patterns

›Pure ankle dislocation without fracture rare

›Estimated 0.065 percent of all ankle injuries

›Estimated 0.46 percent of ankle dislocations

›Tibiotalar dislocation association with ankle fractures

›Reported 21 to 36 percent of ankle fractures

›Adult ankle fracture incidence context

›Reported 179 per 100000 persons per year in one population study

Pathophysiology

›Mechanism and anatomy

›Mortise stability

›Ligament complex often stronger than malleolar bone

›Fracture occurs instead of pure dislocation in many cases

›Common displacement direction

›Posterior dislocation with plantarflexion and axial load

›Injury components

›Deltoid ligament disruption

›Syndesmosis disruption

›Osteochondral talar dome injury risk

›Complication mechanisms

›Skin necrosis from talar pressure

›Vascular compromise from stretch or kinking

›Chondral injury from incongruity

Therapeutic Considerations

›Rationale for urgent reduction

›Perfusion restoration

›Ischemia time reduction

›Skin protection

›Reduce tenting and blanching

›Cartilage protection

›Minimize time out of joint congruity

›Immobilization rationale

›Protect disrupted ligaments and fractures

›Prevent redislocation

›Swelling phase risk

›Avoid circumferential cast early

›Operative versus nonoperative drivers

›Unstable fracture pattern

›Operative fixation common

›Open injury

›Debridement and stabilization

›Syndesmosis instability

›Screw or suture button fixation

›Evidence framing

›Early antibiotics in open fractures reduces infection

›BOAST and ACS TQIP recommend within 1 hour

›ED procedural sedation practice guidance

›ACEP procedural sedation clinical policy Level B no delay for fasting

›ACEP procedural sedation clinical policy Level B capnography as adjunct

11Patient Discharge Instructions/pdi28

Copy discharge instructions

›Discharge instructions

›Splint care

›Keep splint clean and dry

›Do not insert objects to scratch

›Swelling control

›Elevation above heart as much as possible first 48 to 72 hours

›Ice 15 to 20 minutes at a time with skin protection

›Weight bearing

›Non weight bearing until orthopedics follow up

›Crutches or walker use as taught

›Pain plan

›Acetaminophen as directed on label

›Ibuprofen as directed on label if safe for patient

›Opioid only if prescribed

›Wound care for open injury

›Keep dressing intact

›Antibiotics exactly as prescribed

›Return to ED now

›Increasing pain not controlled by medication

›New numbness or tingling

›Toes cold pale or blue

›Increasing tightness in calf or foot

›Splint too tight or painful pressure point

›Splint wet broken or slipping

›Fever or foul drainage from wound

›Follow up

›Orthopedics appointment timing provided

›Return earlier if symptoms worsen

12References/r19

Core sources and guidelines

›References

›NCBI Bookshelf StatPearls Ankle Dislocation imaging should not delay reduction when neurovascular compromise suspected

›Emphasizes early reduction and neurovascular assessment

›BOAST 4 Open Fractures 2017 IV prophylactic antibiotics as soon as possible ideally within 1 hour of injury

›Orthoplastic transfer principles for complex open injuries

›ACS TQIP Orthopaedic Trauma Guidelines broad spectrum IV antibiotics within 1 hour of presentation for open fractures

›Sterile dressing recommendation

›AAOS Prevention of Surgical Site Infections After Major Extremity Trauma guideline debridement and irrigation ideally before 24 hours

›Quality of evidence moderate

›ACEP Clinical Policy Procedural Sedation and Analgesia in the ED 2014 Level B no delay based on fasting time

›Supports ED based procedural sedation practice

›ACEP Clinical Policy Procedural Sedation and Analgesia in the ED 2014 Level B capnography may be used as adjunct to detect hypoventilation

›Monitoring enhancement during sedation

›Pure ankle dislocation epidemiology report pure dislocation incidence 0.065 percent of ankle injuries and 0.46 percent of ankle dislocations

›Highlights rarity and frequent association with fracture

›Review of ankle fracture dislocations reports concomitant tibiotalar dislocation in 21 to 36 percent of ankle fractures

›Supports high suspicion for fracture dislocation

›Epidemiology study adult ankle fractures incidence 179 per 100000 persons per year

›Context for common fracture co injury

Evidence & Review

Reviewed by SymptomDx Medical Team · Last reviewed March 6, 2026

SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.