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(3) Musculoskeletal Imaging > S1_L3: Fracture & Elements of Fracture Description > Flashcards

S1_L3: Fracture & Elements of Fracture Description Flashcards

1
Q

Modified TF
A. In a closed fracture, the skin and soft tissue overlying the fracture is intact.
B. In an open fracture, the skin is perforated and the bone is visible.

A

TT

Note: For open fractures, the fracture must be in proximity with the open injury.

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2
Q

Modified TF
A. Subluxations and dislocations are the most common associated injuries with fractures.
B. Pathological Fractures occur in bones strengthened by a pathological process.

A

TF

B: Pathological Fractures occur in bones weakened by a pathological process.

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3
Q

Modified TF
A. Segmental fractures are classified under spiral fractures.
B. Segmental fractures are segmented by more than one fracture line.

A

FT

A: classified under comminuted fx

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4
Q

Modified TF
A. Naming the displacement or angulation of the fracture is based on the position of the proximal fragment.
B. Alignment is the relationship of the longitudinal axis of one fragment to the other.

A

FT

A: based on the position of the distal fragment

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5
Q

Modified TF: Angulation of fx fragments
A. A dorsal or volar apex is seen in the anteroposterior view.
B. A medial or lateral apex is seen in both the lateral and anteroposterior view.

A

FF

A: seen laterally
B: in AP view only

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6
Q

Special features

  1. Only one side of the bone is impacted
  2. Involves bony prominences serving as attachment of muscles, tendons and ligaments

A. Impaction fracture
B. Depression fracture
C. Compression fracture
D. Avulsion fracture

A
  1. B
  2. D
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7
Q

Special features

  1. Tensile loading of bone
  2. Compression and axial loading of bone

A. Impaction fracture
B. Depression fracture
C. Compression fracture
D. Avulsion fracture

A
  1. D
  2. A
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8
Q

Special features

A spinal fracture where the superior and inferior endplates are driven into the vertebral body. This fracture falls under:

A. Impaction fracture
B. Depression fracture
C. Compression fracture
D. Avulsion fracture

A

C. Compression fracture

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9
Q

Special features

  1. Bone has a stable configuration and good healing potential
  2. Bone is driven into itself

A. Impaction fracture
B. Depression fracture
C. Compression fracture
D. Avulsion fracture

A
  1. A
  2. A
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10
Q

Special features

  1. Fragments pulled away by contraction of the muscle or passive resistance of ligaments against tensile forces
  2. Usually occurs in cancellous bone

A. Impaction fracture
B. Depression fracture
C. Compression fracture
D. Avulsion fracture

A
  1. D
  2. A
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11
Q

Special features

  1. Described by anatomic landmarks
  2. Compression on both sides of the bone

A. Impaction fracture
B. Depression fracture
C. Compression fracture
D. Avulsion fracture

A
  1. D
  2. C
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12
Q

Special features

A skull fracture is assessed and findings show the outer table of the skull is disrupted, but the inner table is intact.

A. Impaction fracture
B. Depression fracture
C. Compression fracture
D. Avulsion fracture

A

B. Depression fracture

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13
Q

Modified TF
A. An incomplete fracture is commonly seen in pediatric patients.
B. A comminuted fracture is an example of a complete fracture.

A

TT

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14
Q

Modified TF
A. Incomplete fractures are relatively stable, and are usually occur in short, irregularly shaped, and flat bones.
B. A complete fracture may be diagnosed using only one view.

A

TF

B: it may NOT because bones typically have 2 cortices in 1 view. In the AP and Lateral views, all cortices may be evaluated.

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15
Q

Modified TF
A. Fracture lines are evident on X-ray as radiolucent.
B. The space between fracture segments depends on the amount of displacement.

A

TT

Note: More displacement leads to more space.

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16
Q

Modified TF
A. Periprosthetic fractures are a special type of fracture associated with orthotic joint replacement.
B. These fractures are usually related to metal implants, such as in THR, due to mismatched hardness or rigidity between the implant and bone, known as the stress riser effect.

A

TT

Note: if screws are involved, it is termed as peri-implant fracture

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17
Q

Modified TF
A. More than 3 fragments are present in comminuted fractures.
B. Comminuted fractures occur due to extremely low energy loads, such as crushing forces in MVA.

A

FF

A: more than 2 fragments
B: dt extremely high loads

18
Q

Modified TF
A. The more surface area is involved in a fracture, the less its healing potential due to its big surface area.
B. A spiral fracture has a better healing potential than transverse or oblique fractures.

A

FT

A: more surface area = better healing potential (because of bigger surface area = more fx healing points)

19
Q

Modified TF
A. A butterfly fragment is a diamond-shaped fragment split from the main fragments in a comminuted fracture.
B. The butterfly fragment is a result of compression and bending in a high level injury.

A

FT

A: it is a triangular wedge-shaped fragment

20
Q

Modified TF
A. A transverse fracture occurs with a diagonally oriented fracture line.
B. An oblique fracture occurs at right angles to a long axis or cortices.

A

FF

A: Oblique fx
B: Transverse fx

21
Q

Modified TF
A. An oblique fracture is caused by combined compression, bending, and torsional forces.
B. A spiral fracture is caused by a torsional force.

A

TT

22
Q

Modified TF
A. In an incomplete fracture, all cortices have been disrupted.
B. In a complete fracture, only one cortex is disrupted.

A

FF

A: complete fx
B: incomplete fx

23
Q

Modified TF
A. Depression fracture occurs due to one surface of a bone is driven into the surface of another
B. In an avulsion fracture, both surfaces of a bone are forced together.

A

TF

B: Compression fracture occurs when both surfaces of a bone are forced together

24
Q

TRUE OR FALSE: A fracture is the disruption of the structural continuity of bone or cartilage.

A

True, the bone or cartilage is ripped off from its original position.

25
Q

Modified TF: Displacement of fx fragments
A. Anterior and posterior displacements are seen on the lateral view.
B. Superior and inferior displacements are seen in the anteroposterior or lateral view.

A

TT

26
Q

TRUE OR FALSE: Fracture lines in the transverse direction are perpendicular to the longitudinal axis, through the shaft of the bone.

A

True

27
Q

Modified TF
A. Stress fractures include microfractures, fatigue fractures, and insufficiency fractures.
B. On the x-ray film, the stress fracture may appear normal.

A

TT

Note: Initially, the x-ray is (-), but when taken again, callus formation can be seen as an attempt of the bone to heal the stress fx.

28
Q

Modified TF
A. Displacement is the loss of apposition or contact.
B. Angulation is deviation from the displacement.

A

TF

B: deviation from alignment

29
Q

Modified TF
A. Medial or lateral displacement is seen on anteroposterior view.
B. Superior or inferior apex of angulation is seen in both lateral and AP views.

A

TT

30
Q

TRUE OR FALSE: Bones may be described & referenced by standard anatomic landmarks.

A

True

31
Q

Modified TF
A. MRI is the recommended diagnostic modality for early detection of stress fractures of the extremities.
B. The MRI will be done using T1 weighted imaging.

A

TF

B: T2

32
Q

TRUE OR FALSE: In a stress fracture, the fracture line or periosteal reaction may not be evident for up to 8 weeks.

A

False: may not be evident for up to 6 weeks.

33
Q

TRUE OR FALSE: A stress fracture is described as an irregular localized area of decreased radiodensity on x-ray.

A

False, it’s increased radiodensity

34
Q

Modified TF
A. An example of a stress fracture is a radioulnar fracture due to osteomyelitis.
B. Stress fractures can be due to repetitive minor trauma to otherwise normal bone.

A

FT

A: it’s pathological fracture

35
Q

Modified TF
A. Stress fractures caused by repetitive minor trauma frequently occur in the LE, especially the tarsals.
B. This type of stress fractures is very common in soldiers and gymnasts.

A

FT

A: frequently occur in the LE, especially the metatarsals

36
Q

TRUE OR FALSE: Stress fractures can be caused by normal loading on abnormal bone, such as vertebral compression fracture in elderly osteoporotic women.

A

True

37
Q

Modified TF: Pathological fractures
A. Can be caused by local processes such as osteogenesis imperfecta, osteopetrosis, osteoporosis, and Paget’s disease.
B. Can be caused by systemic processes such as tumors, infections, disuse, and irradiation.

A

FF

A: These are systemic processes
B. These are local processes

38
Q

Modified TF: Distal end of long bones

A. The intra-articular area consists of the joint space
B. The extra-articular area has a presence of bone flaring

A

TT

39
Q

Modified TF
A. The diaphysis is the shaft of a long bone.
B. The epiphysis is the distal or proximal ends of long bone.

A

TT

40
Q

TRUE OR FALSE: The extra-articular part of the proximal end of long bones consists of the metaphyseal area and expanding end of the shaft.

A

True

(3) Musculoskeletal Imaging (25 decks)

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