Ankle Injury Presentation
Traumatic ankle pain
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Orthopedic SurgeryDiagnostic
Ankle Fracture Assessment & Management (Ottawa Rules)
Ankle Fracture Assessment & Management (Ottawa Rules): Ankle Injury Presentation → Initial Assessment → Obvious Deformity/Dislocation? → ⚠️ Urgent Reduc...
Pathway Overview
18 steps
Algorithm Steps
18 total
01Start 02Action Initial Assessment
History and examination
- Mechanism of injury (inversion, eversion, rotation)
- Ability to weight bear after injury
- Swelling, ecchymosis
- Deformity (obvious fracture-dislocation)
- Neurovascular status
- Skin integrity (open fracture)
03Decision Obvious Deformity/Dislocation?
Gross malalignment requiring urgent care
04Warning ⚠️ Urgent Reduction Needed
Fracture-dislocation
- Reduce immediately if skin tenting
- Analgesia/sedation
- Splint post-reduction
- Check neurovascular post-reduction
- X-ray after reduction
05Action X-ray Indicated
AP, lateral, mortise views
- AP view: Tibiofibular overlap, clear space
- Lateral view: Posterior malleolus
- Mortise view: Talar tilt, medial clear space
- Check for Maisonneuve (proximal fibula)
06Decision Fracture Present?
Classify if fracture found
07Action No Fracture - Ankle Sprain
Treat conservatively
- Assess sprain grade (1-3)
- ATFL most commonly injured
- Grade 1-2: Functional treatment
- Grade 3: Consider immobilization
- Physiotherapy for proprioception
08Outcome Fracture Healed
Return to function
09Decision Weber Classification
Classify lateral malleolus fracture
- Weber A: Below syndesmosis (usually stable)
- Weber B: At level of syndesmosis (may be unstable)
- Weber C: Above syndesmosis (unstable)
10Action Weber A (Infrasyndesmotic)
Usually stable
- Below level of ankle joint
- Syndesmosis intact
- Often isolated lateral malleolus
- Non-operative: Short leg cast/boot
- Weight bearing as tolerated
11Decision Operative vs Non-operative
Based on stability
12Action Non-operative Treatment
Stable fractures
- Below-knee cast or CAM boot
- 6 weeks immobilization typical
- Weight bearing depends on fracture
- Serial X-rays to check alignment
- DVT prophylaxis consideration
- Path rejoins step 08Shared downstream outcome
13Action ORIF (Open Reduction Internal Fixation)
Unstable fractures
- Lateral malleolus: Plate and screws
- Medial malleolus: Screws or tension band
- Posterior malleolus: If >25-33%
- Syndesmotic screw if disrupted
- Non-weight bearing initially
- Path rejoins step 08Shared downstream outcome
14Action Weber B (Transsyndesmotic)
Stability assessment needed
- At level of syndesmosis
- Check medial clear space on mortise
- >4mm medial clear space = unstable
- Stress views or MRI if equivocal
- Stable: Non-operative treatment
- Unstable: ORIF indicated
- Path rejoins step 11Shared downstream outcome
15Action Weber C (Suprasyndesmotic)
Unstable - typically surgical
- Above syndesmosis
- Syndesmosis disrupted
- Often with medial injury (deltoid/med mal)
- ORIF with syndesmotic fixation
- Check for Maisonneuve fracture
- Path rejoins step 11Shared downstream outcome
16Action Bimalleolar/Trimalleolar
Multiple malleoli involved
- Bimalleolar: Lateral + medial malleolus
- Trimalleolar: + posterior malleolus
- Inherently unstable
- Usually requires ORIF
- Posterior malleolus >25-33% = fixation
- Path rejoins step 11Shared downstream outcome
17Decision Apply Ottawa Ankle Rules
Determine need for X-ray
- X-ray indicated if ANY of the following:
- 1. Bone tenderness at posterior 6cm of lateral malleolus tip
- 2. Bone tenderness at posterior 6cm of medial malleolus tip
- 3. Unable to weight bear 4 steps immediately AND now
- Also check Ottawa Foot Rules for midfoot
18Action Ottawa Rules Negative
<1% fracture risk
- No X-ray needed
- Likely ankle sprain
- PRICE: Protection, Rest, Ice, Compression, Elevation
- Analgesia (NSAIDs/paracetamol)
- Functional rehabilitation
- Safety net: Return if not improving in 5-7 days
- Path rejoins step 08Shared downstream outcome
- Path rejoins step 05Shared downstream outcome
Guideline Source
Ottawa Ankle Rules + Weber Classification
Clinical Safety Information
Clinical Decision Support — Not a Substitute for Clinical Judgment
Individual patient factors may require deviation from these recommendations.
Known Limitations
- Ottawa Rules validated for adults - use with caution in children <6
- Does not apply to re-presentation >10 days after injury
- Intoxicated patients may have unreliable exam
- Does not apply if other painful distracting injuries
Applicable Regions
USEU
Version 1Next review: 2027-01-11
Next steps
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Related Resources
Frequently Asked Questions
What is the Ankle Fracture Assessment & Management (Ottawa Rules)?
The Ankle Fracture Assessment & Management (Ottawa Rules) is a diagnostic clinical algorithm for Orthopedic Surgery. It provides a structured decision tree to guide clinical decision-making, based on Ottawa Ankle Rules + Weber Classification.
What guideline is the Ankle Fracture Assessment & Management (Ottawa Rules) based on?
This algorithm is based on Ottawa Ankle Rules + Weber Classification (DOI: 10.1001/jama.1994.03520170048034).
What are the limitations of the Ankle Fracture Assessment & Management (Ottawa Rules)?
Known limitations include: Ottawa Rules validated for adults - use with caution in children <6; Does not apply to re-presentation >10 days after injury; Intoxicated patients may have unreliable exam; Does not apply if other painful distracting injuries. Individual patient factors may require deviation from these recommendations.
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