The ANKLE and the FOOT TRAUMA MI Zucker, MD. A dr Z Lecture On TRAUMA of the Ankle and Foot and some...
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Transcript of The ANKLE and the FOOT TRAUMA MI Zucker, MD. A dr Z Lecture On TRAUMA of the Ankle and Foot and some...
The ANKLE and the FOOT
TRAUMA
MI Zucker, MD
A dr Z Lecture
• On TRAUMA of the Ankle and Foot and some general concepts in musculoskeletal trauma evaluation
Rules for Success in Radiology
• Know which exam to order
• Know which films you need
• Know good films from bad films, and don’t accept bad ones
• Read methodically by check list
• Know the common lesions
• Know the commonly missed lesions
General Approach to Musculoskeletal Radiology
• Soft tissues
• Joints
• Bones
The ANKLE
The Ankle Series
• Anterior-posterior (AP)
• Mortise (15 degree internal oblique)
• Lateral
Anterior-Posterior: Adult
AP: Kid
Mortise: Adult
Lateral: Adult
Lateral: Kid
The INJURIES
ANKLE
When Does the Patient NEED Radiography?
The OTTAWA Rules
Ankle and Foot
The OTTAWA ANKLE Rules
• Unable to weight bear immediately
• Unable to walk four steps in medical facility
• Bone tenderness medial or lateral malleolus
If “YES” to any, get ANKLE films
The OTTAWA FOOT Rules
• Bone tenderness base of fifth metatarsal
• Bone tenderness navicular
If “YES” to either, get foot films
Some OTTAWA Rule caveats
• Not valid if injury not acute
• Some exclude patients under age 18 years or over 55 years
These factors make the Rules less reliable, so we are more likely to do imaging in these circumstances.
OTTAWA Rules: Ankle Tenderness
OTTAWA Rules: Foot Tenderness
The Ankle Sprain
• Grade I: Soft tissues swelling/joint effusion
• Grades II and III: Soft tissue swelling/joint effusion but may also have “FLAKE” avulsion fractures of the dorsum of the talus or navicular bones.
• Management differs, depending on grade
The Sprain: treatment
• Grade I
• Grades II/III
• Ace wrap, crutches, limited time off weight bearing
• Air or posterior splint, crutches, prolonged period off weight bearing, orthopedic consult
Soft Tissue Swelling
Joint Effusion
“FLAKE” Fracture
FRACTURES of the ANKLE
WEBER’S Classification
• Based only on location of a FIBULA fracture. A fracture, or no fracture, of the medial malleolus (tibia) does NOT change the classification.
WEBER’S Classification
• Weber A: Fracture below the joint margin
• Weber B: Fracture begins at the joint margin
• Weber C: Fracture begins above the joint margin
Weber A, B, and C injuries are ALL from INVERSION
WEBER’S Assumptions
• Weber A: Anterior and posterior tibia-fibula and interosseous ligaments intact: STABLE
• Weber B: Anterior and posterior tibia-fibula ligaments torn: Moderately UNSTABLE
• Weber C: Interosseous ligament torn: Completely UNSTABLE
Management of WEBER Injuries
• Weber A: Cast for 6 weeks
• Weber B: Frequently ORIF
• Weber C: Always ORIF
ORIF: Open Reduction Internal Fixation
WEBER A
WEBER B
WEBER C
REMEMBER
If the MEDIAL MALLEOLUS is also fractured, it does NOT change
the Weber classification
What if ONLY the Medial Malleolus is Fractured?
Two possibilities
• Weber A “equivalent” from INVERSION: The Lateral Collateral Ligament is torn but the Lateral Malleolus did not fail
• EVERSION INJURY: an UNSTABLE Maisonneuve Fracture
Maisonneuve Fractures
• These are EVERSION injuries that fracture the MEDIAL MALLEOLUS, tear the entire Interosseous Ligament and Membrane, and exit as a high FIBULA SHAFT fracture
• They are all UNSTABLE and are treated by ORIF
Maisonneuve Fracture: Lower
Maisonneuve Fracture: Upper
Caveat
• The high fibula fracture may be clinically occult
• So, ALWAYS get AP/lateral films of the ENTIRE tibia and fibula if there is an “isolated” medial malleolus fracture on the ankle series
Bimalleolar Fracture
• Medial and lateral malleolar fractures, but still use Weber, as medial malleolar fracture does NOT change classification
• This is a Weber B
Trimalleolar Fracture
• In addition to lateral and medial malleolar fractures, there is a fracture of the distal posterior tibia, called the POSTERIOR Malleolus. If large, extra ORIF needed.
“Ankle” Injuries that are really FOOT Injuries
• Fractures of the base of the Fifth Metatarsal
• Fractures of the Anterior Process of the Calcaneous
• “Flake” fractures of the Talus or Navicular (we already did this, and they are components of an ankle injury)
Fractures of the Base of the Fifth Metatarsal
We will look at these again
When we get to the FOOT
Fractures of the Anterior Process of the Calcaneous
Stress fractures: repetitive microtrauma
Salter-Harris Injuries
Physis injuries, so KIDS ONLY!
Salter-Harris PHYSIS Injuries
• SH I: Physis only• SH II: Physis and
metaphysis• SH III: Physis and
epiphysis• SH IV: Physis, metaphysis
and epiphysis• SH V: Crush injury of
physis• SH VI: Avulsed piece of
metaphysis, physis, and epiphysis
Salter-Harris what?
Salter-Harris I and IV
Remember: KIDS ONLY!
NO Salter-Harris injuries are possible after physis closes:
“Salter-Harris Nothing”
And now…
The FOOT
FOOT: Views
• AP
• Oblique
• Lateral
AP
AP
Oblique
Lateral
AP FOOT: Kid
Lateral FOOT: Kid
Talus
• Avulsions of dorsal margin: Ankle ligament injury (we did it under ANKLE)
• Osteochondral fracture: acute and stress
• Body of talus
Talus Body fracture
Osteochondral Fracture
Calcaneous
• Body: axial load
• Stress: repetitive microtrauma
• Anterior process: ankle injury
Axial Load Fracture
Stress Fracture
• Initial film: pain one week
• Follow-up film: pain three weeks
Fifth Metatarsal Base
• DANCER’S: tubercle, inversion, heals well
• Crepe support, walking boot or cast, on or off weight bearing: depends on extent of fracture
• JONES: proximal shaft, inversion or direct blow or stress, sometimes delayed or non-union
• Posterior cast or boot, off weight bearing
• If non-union, ORIF
Dancer’s Fifth
Jones Fifth
Lisfranc Injuries
• Severe dorsal or plantar flexion at midfoot-forefoot junction
• Usually, very displaced and obvious
• Can be subtle
• ALL need surgery
Lisfranc: obvious
Lisfranc: subtle
Metatarsal fractures
• Spiral
• Stress
Spiral fracture
Stress fracture
Toe fractures
• “Stub”
• Crush
Toe fractures
GOODBYE
• Copyright 2004
MI Zucker