Trauma

 

 Questions   Answers
1.Describe the Rosenthal Classification? Zone 1 – Injury to distal phalanx
Zone 2 – Distal to nail lunula – treatment is Atasoy flap (plantar V to Y) or Kutler flap (biaxial V to Y)
Zone 3 – Distal to  DIPJ – treatment generally amputation
 2.What is the Jahss classification?  Dislocation of the hallux
Type 1 – Dorsal dislocation of proximal phalanx and sesamoids with intact intersesamodial ligamentType 2 – Dorsal dislocation of proximal phalanx and sesamoids
A – ruptured intersesamoid ligament
B – fracture of sesamoid with ruptured intersesamodial ligament
 3.What is the Stewart classification?  Fracture of the base of the 5th metatarsal “EIEIO”

Type I: Extra-articular fx at metaphyseal-diaphyseal junction (True Jones Fracture)

Type II: Intra-articular avulsion fracture

Type III: Extra-articular avulsion fracture

Type IV: Intra-articular, Comminuted

Type V: Extra-articular avulsion fractures of the epiphysis; only occur in children (Salter-Harris Type I fracture)

 4.What is the Torg classification?  Non-union base of the 5th metatarsal
Type 1 – Acute injuries
Type 2 – Delayed union
Type 3 – Non-union
5.Hardcastle classification?

Give the Quenu and Kuss description.

Type A: Total incongruity in any plane
(QK – Homolateral)Type B: Partial incongruity
(QK – Isolateral)
B1 – 1st met goes medial
B2 – Lesser mets go lateralType C: Divergent (QK – Divergent)
C1 – Partial (only 1st and 2nd mets)
C2 – Total (all mets involved)
6.Classification system for Navicular trauma?  Watson-Jones
Type 1 – Navicular tuberosity
Type 2 – Dorsal Lip Avulsion
Type 3 – Navicular Body Fractures
A: Coronal plane fracture
B: Dorso-lateral to plantar-medial fracture
C: Comminution
Type 4 – Stress Fracture of the Navicular
7.Berndt and Harty classification?  Talar dome fractures
Type 1: Chondral Depression.

Type 2: Partial OCD fracture
Type 3: Nondisplaced complete OCD
Type 4: Displaced complete OCD
8.Hawkins classification? Talar Neck Fractures
Type 1 – Non-displaced (13% AVN)
Type 2 – Displaced fx with STJ dislocation (AVN 50%)
Type 3 – Displaced fx with STJ and ankle dislocation (95% AVN)
Type 4 – Displaced  STJ, AJ, TNJ dislocation (> 95% AVN)
9.(SAD) Supination Adduction ankle fractures? Stage 1 – Lateral collateral ligament tear, avulsion fibular fracture (Weber A)
Stage 2 – Vertical medial malleolar fracture (Mueller D)
10.(PAB) Pronation Abduction ankle fractures? Stage 1 – Transverse avulsion fx medial malleolus/ deltoid rupture (Mueller B)
Stage 2 – AITFL syndesmotic rupture or avulsion of its insertion
Stage 3 – Short, oblique lateral malleolus fracture (Weber B), transverse on lateral radiograph
11.(SER) Supination External Rotation ankle fractures? Stage 1 – AITFL syndesmotic rupture or avulsion of its insertion

Stage 2 – Spiral lateral malleolus fracture (Weber B), long, posterior spike on lateral radiograph

Stage 3 – PITFL syndesmotic rupture or avulsion of its insertion

Stage 4 – Transverse avulsion fx medial malleolus/ deltoid rupture (Mueller B)

12.(PER) Pronation External Rotation ankle fractures?  Stage 1 – Transverse avulsion fx medial malleolus/ deltoid rupture (Mueller B)

Stage 2 – AITFL syndesmotic rupture or avulsion of its insertion

Stage 3 – Oblique or spiral fibular fracture suprasyndesmotic (Weber C)

Stage 4 – PITFL syndesmotic rupture or avulsion of its insertion

13.Give the stages in Pronation Dorsiflexion ankle fractures. Stage 1 – Deltoid rupture
Stage 2 – Dorsal tibial lip fracture
Stage 3 – High fibular fracture
Stage 4 – Posterior avulusion/ fracture
14.Sneppen classification?  Talar body fractures
Type 1: Osteochondral fracture.
Type 2: Sagittal, coronal, transverse body fracture.
Type 3: Posterior tubercle fracture.
Type 4: Lateral process fracture.
Type 5: Crush fracture.
15.Sanders classification system?

Uses widest view of the posterior facet on semicoronal CT cut.

Type 1: Non-displaced articular fx.
Type 2: Two-part posterior facet fx.
Type 3: Three-part posterior facet fx.
Type 4: Four-part/comminuted fx.

A/B/C division – A is lateral, B central, and C medial to sustentaculum tali 

16.Rowe Classification for calcaneal fractures? Type 1
A – Plantar tuberosity fractures
B – Sus tali fracture
C – Anterior process fractures
Type 2
A – Extra-articular “beak” fracture of the posterior-superior calcaneal body
B – Intra-articular “tongue-type” Achilles avulsion fracture
Type 3 – Extra-articular calcaneal body fx
Type 4 – Intra-articular comminuted fx
Type 5 – Intra-articular Joint Depression
17.Essex-Lopresti fracture classification?
Tongue-type and Joint Depression fx
18.What is Hawkins sign and when does it appear?  subchondral radiolucent band that occurs in the talar dome, appears 6-8 weeks
19.Common  mechanism of injury for a Lisfranc’s fracture?  Forced dorsiflexion on a plantarflexed foot 
20.What does the Lisfranc ligament connect?  base of the second met to the lateral side of the medial cuneiform
21.Gustilo-Anderson Classification of Open Fracture?  Type 1 – Clean Wound 5cm w/ extensive soft tissue damage
A – Adequate soft tissue coverage
B – Extensive soft tissue damage with periosteal stripping and massive contamination
C – Arterial damage requiring primary repair
22.P’s of compartment syndrome? Pain out of proportion
Pain with passive flexion of hallux
Paresthesia
Pallor
Paralysis
Pulselessness
Pressure
23.How to diagnose compartment syndrome? Diagnose when pressure reading is above 30-40mmHg
24.What instrument you use?  wicks catheder
25.Where is Tillaux-Chaput fx located?  AITFL avulsion from the anterolateral tibia
26.Where is Wagstaff fx located?
 AITFL avulsion from the anteromedial fibula
27.Where is the Volkmann fx located?  PITFL avulsion from the posterior-lateral tibia
28.Where is the Bosworth fx located?  PITFL avulsion from the posterior-medial fibula
29.What is the classification system for acute Achilles Tendon Rupture?  Kuwada
Type 1 – Partial tear involving <50% of tendon
Type 2 – Complete tear w/ 6cm deficit
30.What antibiotics are recommended in the original Gustilo-Anderson article for Class I, II, and III open fractures?  Class I: first generation cephalosporin (Ancef); Class II: first generation cephalosporin (Ancef) and an aminoglycoside; Class III: first generation cephalosporin (Ancef) and an aminoglycoside
31.What antibiotic do you need in the case of a soil-contaminated wound?  Penicillin
32.What are some potential causes of dropfoot? Trauma to fibula neck (deep peroneal nerve), Guillain-Barre, Charcot-Marie Tooth disease, compartment syndrome
33.What is skin tenting? when the bone elevates the skin and causes it to lose vascularity
34.What type of anesthesia is most commonly used when you are trying to reduce an ankle fracture?  Hematoma block
35.Time it takes for a stress fracture to appear on x-ray ?  10-21 days because 30-50% of the cortex has been lost
36.What are 5 podiatric surgical emergencies?  1. Infection with emphysema (gas gangrene)
2. Open fracture/dislocation
3. Compartment syndrome
4. Necrotizing Fasciitis
5. Neurovascular compromise
37.Treatment of open fractures?  1. Incision and Drainage
2. Copious Lavage
3. Eventual reduction and fixation of the fracture
38.Treatment for Gustilo-Anderson Classification of Open Fractures IIIB?  Extensive soft tissue damage with periosteal stripping and massive contamination
Cannot reapproximate soft tissue coverage
Abx choice: Ancef (or high dose PCN), Clindamycin and Aminoglycoside
39.Gustilo-Anderson Classification of Open Fractures IIIC  Extensive soft tissue damage with periosteal stripping and massive contamination
Cannot reapproximate soft tissue coverage
Arterial damage requiring primary repair
Abx choice: Ancef (or high dose PCN), Clindamycin and Aminoglycoside
40.What are the 6″P’s” of compartment syndrome?  Pain out of proportion and not controlled by analgesics
Paralysis
Pain with passive dorsiflexion of the toes
Pulselessness
Paresthesia
Pressure
Pallor
41.What is strain?  change in length over original length
42.What are advantages of exfixes?  -good for closed or limited open surgery
-achieves multilevel correction
-gradual lengthening
-postoperative adjustments
-possible early WB
-good wound surveilance
43.What are disadvantages of the EXFIX?  -bulky heavy, patients dont like, cage rage
-lots of FU to prevent infx
-may refx after exfix removal
-takes a LONG time
44.What are indications for a pin to bar exfix?  -post trauma stabilization
-arthrodesis
-intraoperative tool
45.What are 4 main types of EXFIXES?
-pin to bar (delta frame)
-circular frame (ilizarov–>Static or spatial)
-monolateral (minirail)
-hybrid (circular + delta)
46.What is another name for the monolateral exfix?  minirail, for callus distrction in brchymeatarsia
47.What does CORA stand for?  Center of Rotation Axis
48.Where are pilon fx?  at distal tibia and its articular surface
49.What are the two main mechanism of action of pilon fx?  -rotational injuries
-axial loading injuries
50.Describe a pilon fx caused by axial loading.
-caused by high energy injury
-articular comminution and impaction
-metaphyseal comminution
-major fragment displacement (widening)
-soft tissue insult
51.What are three types of plates used to fix a tibia?  -DCP
-Recon plate
-Stacked 1/3 tubular plate
52.What are the stages of treatment for a high energy pilon fx?  1) Exfix for traction and stability
2) CT for preop planning
3) Elevate and wait for swelling to go down
4) Reconstruction
 53.What is the vassal principle?  Fixture/stabilization of the primary dislocation will cause the secondary dislocations to reduce.
“Restore the keystone and the rest will follow”
54.What is ligamento taxis?
ligaments help reduce secondary dislocations when the primary/keystone dislocation is stabilized and reduced.
55.What are the three steps to closed reduction? Charle’s principles?  -exaggerate deformity
-distract
-reduce
-splint
56.What are the three most popular narcotics used for analgesia during closed reductions?  -fentanyl
-dilaudid
-morphine
57.What are the 4 most common sedatived used for closed reductions?  -propofol
-ketamine
-etomidate
-midazolam

External fixation

 
What are some advantages of Ex-Fix?
What are the disadvantages?
  • “Cage Rage”
  • Pin-track complication
  • Restricted joint motion
What are the materials involved in an Ex-Fix?
  1. Half rings
  2. wires
  3. wires with olives
  4. clamps
  5. bolts
  6. rods
  7. posts
  8. washers
  9. nuts
What are the types of Ex-Fix?
  • Unilateral
  • Circular
  • Hybrid
What are Ex-Fix made of? stainless steel/titanium
Describe a unilateral Ex-Fix? half pins in a linear placement clamp to a fixator (i.e. mini rail)
When do you use a unilateral Ex-Fix? lengthening, primary fusion, stability
What is a weakness of using a unilateral Ex-Fix? No stability in the sagittal plane, so it can still move a lot.
What are the two types of circular Ex-Fix? Ilizarov &  Taylor Spatial Frame
What are the properties of an Ilizarov Ex-Fix?
  •  distraction and compression
  • distracts in 2 planes
  • biplane distraction through monoplane hinges
What is the mechanism of action for an Ilizarov? It adds stabilization by the use of tension wires and half-pins are screwed to the bone.
What is the difference between Ilizarov and Taylor Spatial Frame? Taylor Spatial Frame allows triplane reduction. Taylor Spatial Frame you need to reduce the deformity before adding on the ex-fix.
What is the mechanism of a Spatial Frame? Stability is created using rings and tension wires. When the wires are placed under tension, there is an increase in bone stability.
What is a hybrid frame? Combines one circular frame and at least one unilateral frame
When would you apply an Ex-Fix in an acute setting?
  1. Limb lengthening
  2. Infection present
  3. Acute trauma stabilization
  4.  Arthrodesis
  5. Charcot Reconstruction
What are the three segments of concern when applying an Ex-fix?
  1.  Neck of fibulae
  2. Distal metaphyseal flare
  3. Ankle joint line
What are we concerned at the neck of the fibula? The common peroneal nerve
Where is the K wire inserted at the first segment?  Transfibular wires at this level must be inserted through the head of the fibula and away from the neck.
 What are we concerned about at the ankle joint line?
  1. The posterior tibial neurovascular bundle now lies posteromedially between flexor digitorum and flexor hallucis longus.
  2. wire may transfix  the distal belly of flexor hallucis longus,  the great toe should be dorsiflexed

medications