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Emergency Med/Trauma > Midfoot Fractures > Flashcards

Midfoot Fractures Flashcards

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Royal College: Emergency Medicine flashcards
1
Q

What is the most common midfoot fracture?

A

Navicular fracture

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2
Q

What are the 4 types of navicular fractures?

A

Dorsal avulsion
Tuberosity
Body
Stress

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3
Q

What areas of the navicular have good and bad blood supply

A

Good - medial/lateral

Bad - central

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4
Q

What is the MOI for a navicular dorsal avulsion fracture?

A

PF w/ inversion
-talonavicular ligament

PF w/ eversion
-dorsal tibionavicular

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5
Q

When should you treat a navicular dorsal avulsion fracture surgically?

A

Fragment is still symptomatic

Fragment involves >20% of articular cartilage

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6
Q

What is the MOI of a navicular tuberosity fracture?

A

Eversion

Pull of the PTT or spring ligament causes avulsion

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7
Q

When should you treat a navicular tuberosity fracture surgically?

A

Non-union
Displacement
Large fragment

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8
Q

MOI of a non-displaced navicular body fracture?

A

Foot strikes ground in a plantarflexed position, the foot is then forced into a DF position w/ a pronated RF, the navicular then is trapped b/w cuneiforms and the talus

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9
Q

MOI of a displaced navicular body fracture

A

Foot strikes plantarflexed and then buckles at the midfoot causing the soft tissues to fail and allow displacement

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10
Q

3 types of displaced navicular body fractures

A

1 - transverse fx

2 - oblique fx

3 - central/lateral comminution

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11
Q

Displaced navicular body fractures are typically treated how?

A

ORIF w/ NWB short leg cast

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12
Q

Typical area for a navicular stress fracture

A

Central to lateral 1/3 of body due to it being relatively avascular

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13
Q

Navicular stress fracture treatment

A

NWB cast for 6-8 weeks

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14
Q

What are the 4 types of cuneiform fractures?

A

Avulsion
Body
Dislocation
Stress

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15
Q

An avulsion fracture of the medial cuneiform occurs because of what?

A

Pull of the TA tendon

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16
Q

MOI of a cuneiform dislocation fracture

A

Foot striking in a PF causing soft tissue to fail. Often seen with Lisfranc injury

17
Q

What are the 3 types of cuboid fractures?

A

Avulsion
Simple body
Compression

18
Q

Describe the cause of a cuboid avulsion fracture

A

Most common

-pull of the inferior CC ligament

19
Q

MOI of a cuboid simple body fracture

A

Foot strikes in a PF position with axial or rotary forces

20
Q

What is a “Nutcracker fracture”?

A

Cuboid gets caught b/w the bases of mets 4,5, and calcaneous.

Foot is ABducted in a PF position

21
Q

How do you typically treat an avulsion fx or non-displaced fx of the cuboid?

A

WB in boot or cast for 6 weeks

Emergency Med/Trauma (26 decks)

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