lower extremity dislocations: management and triage on the ...€¦ · lower extremity...
TRANSCRIPT
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Lower Extremity Dislocations: Management and Triage
on the Field
Scott J Tarantino, MD Towson Orthopaedic Associates, Towson, MD
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Disclsures None
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Purpose To provide you with knowledge which
may guide you through the on-field management and triage of dislocations of the lower extremity
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Lower Extremity Dislocations (too many to cover)
Hip (Femoroacetabular)
Knee Patellofemoral Tibiofemoral Proximal tibiofibular
Ankle Tibiotalar Distal tibiofibular
Foot Subtalar Lisfranc
(Tarsometatarsal) MTP Interphalangeal
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Lower Extremity Dislocations (too many to cover)
Hip (Femoroacetabular)
Knee Patellofemoral Tibiofemoral Proximal tibiofibular
Ankle Tibiotalar Distal tibiofibular
Foot Subtalar Lisfranc
(Tarsometatarsal) MTP Interphalangeal
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Management and Triage
Management • What do I do to the patient?
Triage • What do I do with the patient?
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Lower Extremity Dislocations (too many to cover)
Hip (Femoroacetabular)
Knee Patellofemoral Tibiofemoral Proximal tibiofibular
Ankle Tibiotalar Distal tibiofibular
Foot Subtalar Lisfranc
(Tarsometatarsal) MTP Interphalangeal
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Hip Dislocations Anatomy
Types
Issues
Management and Triage
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Hip Anatomy Ball and socket joint
Stability due to
conformity of joint, labrum, and capsule
Blood supply
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Blood Supply to the Hip Medial femoral
circumflex
Lateral femoral circumflex
Obturator branch
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Types of Hip Dislocations Posterior
Most common type (>90%) Leg will be flexed slightly, adducted, and
internally rotated
Anterior Less common Leg will be flexed abducted, and externally
rotated
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Issues to Consider With dislocation, there will be soft tissue trauma
(ligaments, capsule, labrum, etc) along with possibility of……
• Neurological compromise • Concurrent bony injury (fractures)
Vascular flow to femoral head is compromised
and must be restored ASAP to minimize risk of AVN
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Management of Hip Dislocation on the Field
Must make accurate diagnosis Lots of pain with fixed
posturing of leg
Must do neurologic
examination Sciatic nerve at risk (esp
peroneal division) Foot drop most common
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Radiographic Imaging
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Management of Hip Dislocations on the Field
If orthopedic background or have a comfort level, can try a closed manual reduction (CMR) on the field….often the easiest time to reduce a joint is right after the injury
If not, splint leg in the position it is in and call an
ambulance ASAP!!
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Triage of Hip Dislocation on Field They all go to the hospital (reduced or not)
If it is not reduced on field, it is a TRUE
EMERGENCY!!!! If reduced, it is non-emergent
Need Xray, closed reduction, and post-reduction CT scan (evaluates for loose fragments in joint or fractures)
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Pre-reduction CT scan
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Post-reduction CT scans
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Ravens with Hip Dislocations
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NCAA BCS Football Championship
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NCAA BCS Football Championship
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Summary of Hip Dislocations Accurate diagnosis on field Need neurologic examination Attempted closed reduction
• Not recommended if no orthopedic background
All go to the hospital by ambulance Xrays, CMR, CT scan Surgery need depends on concurrent injuries Worry about long term AVN
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Lower Extremity Dislocations (too many to cover)
Hip (Femoroacetabular)
Knee Patellofemoral Tibiofemoral Proximal tibiofibular
Ankle Tibiotalar Distal tibiofibular
Foot Subtalar Lisfranc
(Tarsometatarsal) MTP Interphalangeal
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Knee dislocations Anatomy
Types
Issues
Management and Triage
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Bony Anatomy of the Knee • Femur • Tibia • Fibula • Patella
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Ligaments and Articulations
• ACL/PCL • MCL/LCL
• Tibiofemoral • Tibiofibular • Patellofemoral
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Muscular anatomy
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Types of Knee Dislocations Patellofemoral
Very common Medial and lateral Lateral much more common (>90%)
Tibiofemoral
Named for direction tibia goes Anterior, posterior, medial, lateral….most are
a combination injury
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Lower Extremity Dislocations (too many to cover)
Hip (Femoroacetabular)
Knee Patellofemoral Tibiofemoral Proximal tibiofibular
Ankle Tibiotalar Distal tibiofibular
Foot Subtalar Lisfranc
(Tarsometatarsal) MTP Interphalangeal
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Patellofemoral dislocation Patellofemoral joint is inherently unstable
Stability conferred by bony conformity, soft
tissues, and quadriceps
Most forces around knee lead to a laterally directed force……lateral dislocations are much more common
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Issues with patellar dislocation • >90% lateral
• Can be associated with osteochondral fractures
and loose bodies
• Associated soft tissue injury (MPFL)
• Knee held in a flexed position with patella along lateral femoral condyle
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Lateral Patellofemoral Dislocation
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Xray of patellofemoral dislocation
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Management of patellar dislocation on the field
• Reduce by placing gentle medial pressure on lateral border of patella while simultaneously extending knee
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Management of patellar dislocation on field
Reduce patellofemoral joint
Does not return to game
Apply knee immobilizer/compression/ICE
WBAT in extension with crutches
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Triage of Patellofemoral Dislocation Patient may go home with knee
immobilizer/crutches (ER not necessary) Advise to ice/elevate Xray when convenient Needs evaluation by orthopedic surgeon
• MRI • Brace and Physical therapy • +/- surgery
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Lower Extremity Dislocations (too many to cover)
Hip (Femoroacetabular)
Knee Patellofemoral Tibiofemoral Proximal tibiofibular
Ankle Tibiotalar Distal tibiofibular
Foot Subtalar Lisfranc
(Tarsometatarsal) MTP Interphalangeal
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Knee dislocation (tibio-femoral) • Low velocity (athletic) vs high velocity (MVA)
• Can be anterior (30%), posterior (25%), medial,
lateral, or rotational--named for tibial position
• Limb threatening injury • EMERGENCY!!!!
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Issues to consider with knee dislocations
20-40% knee dislocations will have a vascular injury (popliteal artery) that can lead to limb loss
20-40% knee dislocations will have a neurologic injury (peroneal nerve) and many are permanent injuries
Compartment syndrome is not uncommon
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Management of knee dislocations on the field
Call 911 and get an ambulance if not at game
Must check distal pulses and neurologic exam PRIOR to any reduction maneuver
Attempt reduction on field by reproducing the injury (especially if vascular compromise)
• Anterior dislocation….hyperextension • Posterior dislocation…..hyperflexion
Splint leg whether reduced or not
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Triage of knee dislocations All go to hospital immediately by ambulance
Call hospital
Need immediate reduction, Xrays, orthopedic
and vascular evaluations
Admission to hospital (typical) • May need early vascular intervention • May need early orthopedic intervention
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Prefer to not see these Xrays on your players
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Clinical appearance of knee dislocation
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Marcus Lattimore knee dislocation
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Summary of Knee dislocations
Patellofemoral Reduce on field RICE Knee immobilizer Xray when convenient Orthopaedic evaluation
Tibiofemoral Neurovascular exam Call 911 Reduce on field?? Splint All go to hospital on
emergent basis, especially if vascular compromise!!!
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Lower Extremity Dislocations (too many to cover)
Hip (Femoroacetabular)
Knee Patellofemoral Tibiofemoral Proximal tibiofibular
Ankle Tibiotalar Distal tibiofibular
Foot Subtalar Lisfranc
(Tarsometatarsal) MTP Interphalangeal
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Ankle dislocations Anatomy
Types
Issues
Management and Triage
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Ankle Anatomy Tibia, Talus, Fibula
Tibiotalar and distal
tibiofibular (syndesmosis) joints
Talus is constrained by the bony architecture of the ankle (ligaments)
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Types of Ankle Dislocations
Named for position of the talus….can be anterior, posterior, medial, lateral, or a combination
Most common are lateral, posterior, posterolateral
Usually closed, but can be open injuries
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Xrays of ankle dislocations Normal ankle Lateral ankle dislocation
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Xrays of ankle dislocations Normal lateral ankle Posterior ankle dislocation
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Issues with ankle dislocations Always associated with fractures of ankle
Medial skin compromise from lateral or
posterolateral dislocations
Rarely associated with neurovascular compromise
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Medial skin compromise
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Management of ankle dislocations on the field
If you can achieve better position and alignment of ankle (ie—closed reduction), then do it
• Minimizes pain for patient • Minimizes risk of medial skin compromise • Helps to keep swelling down
Splint on the field
Ice, elevation
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Triage of Ankle Dislocations
All go to hospital (not local walk-in centers) for Xrays to assure that reduction of ankle is acceptable and for proper splinting
Need orthopedic follow up for surgery
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Clinical appearance
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Summary of Ankle Dislocations Always associated with fractures of ankle
Can develop local skin compromise
Urgent reduction/splint if possible on field
All go to hospital for Xrays to check reduction
Will need orthopedic evaluation for surgery
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In conclusion….. If you can ever reduce a dislocated joint with
reasonable safety, do it • You will not do any harm to patient, and you may help them substantially • Use judgment with knees and hips!!!
All get splinted on field
Hips, knees, and ankles go immediately to hospital;
Patella can go home
All require orthopedic doctor follow-up