Ankle Positioning Flashcards

1
Q

What are the structures seen for an AP ankle?

A
  • True AP position of ankle
  • Distal ends of tibia & fibula, and the proximal portion of the talus are seen
  • Tibiotalar joint space is seen
  • Talus slightly overlapping distal fibula
  • Includes tib-fib articulation & proximal half of metatarsals
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2
Q

How is the patient positioned for an AP ankle?

A
  • Patient is either supine or sitting on table
  • Dorsiflexed foot
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3
Q

Where is the CR for an AP ankle?

A

Perpendicular through the ankle joint between malleoli

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4
Q

What are the structures seen for an AP oblique medial rotation (mortise) ankle?

A
  • Three sides of mortise joint visualised
  • Talofibular joint spaced in profile
  • No overlap of the anterior tubercle of the tibia and the superolateral portion of the talus with the fibula
  • Includes tib-fib articulation and proximal half of metatarsals
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5
Q

How is the patient positioned for an AP oblique medial rotation (mortise) ankle?

A
  • Patient is either supine or sitting on table
  • Dorsiflexed foot
  • Internally rotate leg & foot 15-20 degrees
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6
Q

Where is the CR for an AP oblique medial rotation (mortise) ankle?

A

Perpendicular through ankle joint between malleoli

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7
Q

Where is the intermalleolar plane for an AP oblique medial rotation (mortise) ankle?

A

Parallel with IR

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8
Q

Whats another name for a mortise view?

A

AP oblique medial rotation

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9
Q

Whats another name for an AP oblique medial rotation?

A

Mortise view

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10
Q

What are the structures seen for a 45-degree medial oblique ankle?

A
  • Distal tibia, fibula, and talus are seen
  • Distal tibia and fibula overlapping some of the talus
  • Tibiofibular articulation seen
  • Includes tib-fib articulation and proximal half of metatarsals
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11
Q

How is the patient positioned for a 45-degree medial oblique ankle?

A
  • Patient is either supine or sitting on table
  • Dorsiflexed foot
  • Rotate hip, knee, and ankle as a unit 45 degrees medially
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12
Q

Where is the CR for a 45-degree medial oblique ankle?

A

Perpendicular through ankle joint between malleoli

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13
Q

What are the structures seen for a 45-degree lateral oblique ankle?

A
  • Demonstrates superior aspect of calcaneus, called the calcaneal sulcus
  • Subtalar joint is seen
  • Useful in locating fractures
  • Include tib-fib articulation and proximal half of metatarsals
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14
Q

Whats another word for the superior aspect of the calcaneus?

A

Calcaneal sulcus

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15
Q

What is the calcaneal sulcus?

A

The superior aspect of the calcaneus

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16
Q

What ankle view is useful in locating fractures?

A

45-degree lateral oblique

17
Q

What is the 45-degree lateral oblique useful for?

A

Locating fractures

18
Q

How is the patient positioned for a 45-degree lateral oblique ankle?

A
  • Patient is supine or sitting on table
  • Dorsiflexed foot
  • Rotate hip, knee, and ankle as a unit 45 degrees laterally
19
Q

Where is the CR for a 45-degree lateral oblique ankle?

A

Perpendicular through ankle joint between malleoli

20
Q

What are the structures seen for a mediolateral ankle?

A
  • Tibiotalar joint well visulaized
  • Fibula over the posterior half of the tibia
  • 5th metatarsal should be seen to check for jones fracture
  • Include tib-fib articulation
21
Q

How is the patient positioned for a mediolateral ankle?

A
  • Patient is rolled toward the affected side to place lateral surface of ankle in contact with IR
  • Dorsiflexed foot
22
Q

Where is the CR for a mediolateral ankle?

A

Perpendicular at medial malleolus