01Approach to the Critical Patient/attcp54

Immediate priorities

›Limb-threatening features

›Fracture-dislocation with gross deformity

›Talar displacement under the tibia

›Skin tenting or blanching over malleoli

›Neurovascular compromise

›Absent dorsalis pedis or posterior tibial pulse

›Pallor, paresthesias, or motor deficit distal to injury

›If fracture-dislocation or vascular deficit, emergent closed reduction before imaging delays

›Restore talar alignment to protect skin and vessels

›Post-reduction neurovascular recheck

›Open fracture

›Skin breach over or near fracture site

›Bone visible or palpable through wound

›Active bleeding or contamination

›If open, initiate sterile saline-moist cover and urgent orthopedic consult

›Cefazolin 2 g IV early

›Tetanus status update

›Compartment syndrome surveillance

›Pain out of proportion to injury

›Pain with passive stretch of toes

›Tense, firm compartments

›Irreversible damage within 6 hours of onset

›Serial neurovascular checks

›Avoid masking with excessive opioids

Monitoring and targets

›Limb monitoring bundle

›Distal perfusion checks

02History/hx68

Injury characterization

›Mechanism of injury

›Supination-external rotation pattern

›Most common bimalleolar mechanism

›Twisting or rotational force on planted foot

›High-energy mechanisms

›Fall from height

›Direct trauma or motor vehicle collision

›Sports-related twisting

›Soccer or basketball pivot

›Landing on inverted or everted foot

›Onset and course

›Sudden pain at time of injury

›Audible pop or crack

›Immediate inability to bear weight

›Timing and presentation delay

›Hours since injury

›Delay affecting swelling and surgical timing

Risk factors

›Host risk factors

›Age over 50 years

›Postmenopausal women at higher risk

›Fragility-pattern injury

›Osteoporosis

›Increased comminution

›Higher fixation failure risk

›Diabetes mellitus

›Wound healing complications

03Physical Exam/exam71

Inspection and skin

›Deformity and swelling

›Visible angulation or shortening

›Talar shift appearance

›Medial and lateral malleolar prominence

›Ecchymosis

›Medial and lateral bruising

›Extent suggesting energy of injury

›Skin integrity

›Skin tenting or blanching

›Impending necrosis indicator

›Urgent reduction trigger

›Fracture blisters

›May delay definitive surgery

›Careful soft tissue handling

›Open wounds

›Breach over fracture site

›Contamination assessment

Palpation

›Bony tenderness mapping

›Medial malleolus

›Deltoid ligament region

›Medial clear space focus

›Lateral malleolus

›Distal fibula

›Posterior edge tenderness

›Entire fibula length to head

›Maisonneuve rule-out

04Differential Diagnosis/ddx34

Ankle fracture spectrum

›Malleolar fracture patterns

›Bimalleolar fracture

›ICD-10 S82.84

›Both malleoli fractured, unstable mortise

›Trimalleolar fracture

›Posterior malleolus additionally fractured

›Check lateral radiograph carefully

›Bimalleolar equivalent

›Lateral malleolus fracture with deltoid rupture

›Medial clear space widening without medial fracture

›Proximal and high-energy patterns

›Maisonneuve fracture

›Proximal fibula fracture with syndesmotic disruption

›Medial injury component

›Pilon fracture

›Tibial plafond involvement

›Axial loading mechanism

Mimics and coexisting injuries

›Ligamentous and tendon injuries

›Ankle dislocation without fracture

›Pure ligamentous injury

›Rare presentation

›Achilles tendon rupture

›Posterior pain

›Positive Thompson test

›Other osseous causes

›Talar fracture or osteochondral lesion

05Laboratory Tests/lt31

Role of labs in isolated injury

›Routine testing

›Not required for isolated ankle fracture in young healthy patients

›Clinical and radiographic diagnosis

›Avoid unnecessary phlebotomy

›Inflammatory markers

›ESR and CRP only if infection concern

›Open fracture or delayed presentation

›Thrombosis evaluation

›D-dimer

›Not routinely indicated

›Consider only if DVT or PE suspicion during immobilization

›Limitations

›Low specificity after trauma

›Trauma itself elevates D-dimer

Preoperative labs

›Surgical optimization panel

›Complete blood count

›Baseline hemoglobin

›Platelet count for fixation planning

›Basic metabolic panel

›Renal function for anesthesia

›Electrolyte correction

›Coagulation studies

›INR in anticoagulated patients

›Guide surgical timing

›Glycemic and bone health

›Glucose and HbA1c in diabetics

06Diagnostic Tests/dt81

Scoring Systems

›Ottawa Ankle Rules

›Indication for radiography

›Inability to bear weight for 4 steps

›Bone tenderness at posterior edge or tip of either malleolus

›Performance

›Sensitivity 91 to 100 percent for fracture

›High negative predictive value

›Application caveat

›Obvious bimalleolar deformity always warrants imaging

›Rule used to exclude, not confirm

›Fracture classification systems

›Weber classification

›Type A below syndesmosis

›Type B at syndesmosis

›Type C above syndesmosis

›Lauge-Hansen classification

›Foot position plus force direction

›Supination-external rotation type 4 most common bimalleolar pattern

›CT improves interobserver agreement from kappa 0.46 to 0.80

›Stability-based classification

›Superior prognostic capacity for predicting surgery

›AUC 0.883 versus Weber or Lauge-Hansen

›VTE and pressure tools

›TRiP(cast) score

›Risk stratification for lower-limb immobilization

›Bimalleolar fracture scores 2 trauma points

›Total score 7 or higher warrants prophylactic anticoagulation

07Disposition/dispo37

Admission criteria

›Operative and limb-threat admissions

›Fracture-dislocation requiring urgent ORIF

›Unstable reduction

›Skin or neurovascular compromise

›Open fracture

›Antibiotics and operative irrigation

›Surgical debridement timing

›Compartment syndrome concern

›Serial pressure monitoring

›Potential fasciotomy

›Medical and social admissions

›Significant comorbidities needing optimization

›Anticoagulation reversal

›Glycemic or cardiac stabilization

›Unsafe home situation

›Elderly living alone

›No support for non-weight-bearing

Discharge criteria and follow up

›Safe discharge requirements

›Adequate reduction maintained

›Acceptable alignment on post-reduction films

›Stable in splint

›Intact neurovascular exam

›Palpable pulses

›Preserved sensation and motor

›Adequate pain control and reliability

›Oral analgesia sufficient

08Treatment/t88

ED stabilization

›Closed reduction for fracture-dislocation

›Indication

›Talar displacement with skin tenting

›Neurovascular compromise

›Technique

›Longitudinal traction on heel with counter-traction on leg

›Reverse the deforming force

›Post-reduction radiographs to confirm alignment

›If reduction unstable, repeat and re-splint

›Reassess neurovascular status

›Orthopedics at bedside

›Immobilization

›Posterior short-leg splint with U-shaped stirrup

›Sugar-tong configuration

›Neutral dorsiflexion position

›Avoid circumferential casting acutely

›Swelling risk

›Compartment compromise risk

›Ice and elevation above heart level

›Reduce swelling

›Improve soft tissue for surgery

Analgesia

›Acute analgesia

›NSAIDs

›Ibuprofen 400 to 600 mg PO

›Ketorolac 15 to 30 mg IV

›Acetaminophen

›1 g PO or IV

›Opioid-sparing adjunct

›Opioids for severe pain

›Morphine IV titrated to effect

›Oxycodone PO

›Avoid excess masking compartment syndrome

›Procedural analgesia for reduction

›Intra-articular hematoma block

›10 to 20 mL 1 percent lidocaine into fracture hematoma

›Comparable pain control to sedation with shorter ED times

›Avoids sedation-related risks

›Procedural sedation when block insufficient

›Ketamine 1 to 2 mg/kg IV

›Propofol titrated by weight

›Etomidate with fentanyl

Definitive management

›Operative fixation

›ORIF as standard of care for displaced bimalleolar fractures

›Lateral malleolus plate and screws

›Medial malleolus screws or tension band

›Timing

›Early fixation ideally within 8 hours if soft tissues allow

›Delays impair anatomical restoration

›If soft tissue swelling precludes early surgery

›Temporary external fixation or splinting with elevation

›Definitive surgery typically at 7 to 14 days when swelling resolves

›Conservative management

›Limited indications

›Non-displaced fracture with maintained reduction

›Prohibitive surgical risk

›Requirements

›Closed reduction and casting

›Close radiographic follow-up for secondary displacement

Postoperative and adjunctive care

›Weight-bearing protocol

›Traditional protocol

›Non-weight-bearing for 6 weeks in splint or boot

›Progressive weight-bearing thereafter

›Early weight-bearing evidence

›Supported after stable ORIF

›No increase in short-term complications

›Open fracture measures

›Antibiotics

›Cefazolin 2 g IV

›Add gentamicin for higher Gustilo grades

›Tetanus prophylaxis

›Update per immunization status

›Tetanus immunoglobulin if unimmunized

VTE prophylaxis

›Prophylaxis selection

›Aspirin

›81 mg twice daily

›Noninferior to enoxaparin after operatively treated fractures per PREVENT CLOT trial

›90-day mortality 0.78 percent versus 0.73 percent

›Low molecular weight heparin

›Enoxaparin 40 mg subcutaneous daily

›Alternative fondaparinux 2.5 mg daily

›Rivaroxaban highest efficacy in network meta-analysis

›Targeted approach

›TRiP(cast)-guided prophylaxis

›Bimalleolar fracture intermediate trauma score 2

›Total score 7 or higher warrants anticoagulation

›Risk-benefit individualization

›Bleeding risk assessment

›Immobilization duration

09Special Populations/sp48

Pregnancy

›Imaging approach

›Ankle radiographs with abdominal shielding

›Negligible fetal dose at distal extremity

›First-line for diagnosis

›CT only when benefits outweigh risks

›Reserve for complex patterns

›Shielding applied

›Medication and anesthesia

›Analgesia selection

›Acetaminophen preferred

›Limit NSAIDs especially third trimester

›Anesthesia planning

›Regional techniques favored

›Aspiration precautions due to delayed gastric emptying

›VTE risk elevated

›Pregnancy hypercoagulable state

›LMWH preferred over warfarin

Geriatric

›Fracture characteristics

›Osteoporotic bone

›Increased comminution

›Higher fixation failure risk

›Fragility mechanism

›Low-energy twisting fall

›Consider syncope workup if unwitnessed

›Management modifications

›Baseline function drives planning

10Background/b51

Epidemiology

›Frequency and demographics

›Proportion of ankle fractures

›Bimalleolar fractures account for approximately 23 percent of ankle fractures

›Inherently unstable injuries

›Age and sex distribution

›Higher in patients over 50 years

›Postmenopausal women overrepresented

›Young males in sports-related injuries

›Burden and outcomes

›Operative requirement

›Vast majority require ORIF

›Displaced fractures almost universally surgical

›Long-term sequelae

›Post-traumatic arthritis

›Chronic pain and stiffness

Pathophysiology

›Mechanism of instability

›Disruption of both stabilizing structures

›Medial and lateral malleolar columns fractured

›Talus no longer congruent under tibia

›Supination-external rotation cascade

›Sequential failure of lateral then medial structures

›SER type 4 most common bimalleolar pattern

›Soft tissue and complication pathways

›Soft tissue envelope

›Swelling and fracture blisters delay surgery

›Skin tenting risks necrosis

11Patient Discharge Instructions/pdi24

copy discharge instructions

›Ankle fracture home care

›Keep the splint clean, dry, and in place

›Elevate the ankle above heart level as much as possible

›Apply ice over the splint for 20 minutes at a time

›Do not put any weight on the injured leg until cleared

›Use crutches or a walker as instructed

›Take pain medication as prescribed

›Warning signs to return to ER

›Increasing pain not relieved by elevation and medication

›Numbness, tingling, or inability to move toes

›Toes that turn pale, blue, or feel cold

›Splint feels too tight or causes new pressure pain

›Calf swelling, pain, or warmth

›Chest pain or shortness of breath

›Fever, wound drainage, or foul odor from the splint

›Follow up

›See orthopedics within 48 to 72 hours

›Bring this paperwork and your imaging to the appointment

›Surgery is usually needed for this type of fracture

›Recovery expectations

›Fracture healing takes about 6 to 12 weeks

›Full functional recovery may take 4 to 6 months

›Physical therapy is recommended after immobilization

›Stop smoking to help the bone heal

12References/r15

Guidelines and key sources

›Decision tools and classifications

›Ottawa Ankle Rules diagnostic accuracy meta-analysis

›Weber and Lauge-Hansen classification literature

›Ankle fracture stability-based classification studies

›Landmark trials and reviews

›PREVENT CLOT trial aspirin versus LMWH after fracture

›TRiP(cast) targeted prophylaxis randomized implementation trial

›Cochrane reviews on surgical versus conservative treatment and rehabilitation

›Society and imaging guidance

›ACR Appropriateness Criteria acute trauma to the ankle

›American College of Surgeons best practices in orthopaedic trauma

›Intra-articular hematoma block versus procedural sedation trials

›Coding standards

›ICD-10 S82.84 bimalleolar fracture of lower leg

›SNOMED CT bimalleolar fracture disorder concept

Evidence & Review

Evidence & Review