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Positioning > Femur, Knee > Flashcards

Femur, Knee Flashcards

1
Q

Name letter “A”

A

Femur

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2
Q

Name letter “B”

A

Patella

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3
Q

Name letter “C”

A

Lateral epicondyle

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4
Q

Name letter “D”

A

Lateral condyle

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5
Q

Name the letter “E”

A

Lateral tibial plateau

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6
Q

Name letter “F”

A

Intercondylar eminence

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7
Q

Name letter “G”

A

Head of fibula

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8
Q

Name letter “H”

A

Tibia

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9
Q

Name letter “I”

A

Fibula

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10
Q

When measuring ASIS for knee projections, what is the central ray angle at 18 cm and below?

A

5°-7° Caudad

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11
Q

When measuring ASIS for knee projections, what is the central ray angle at 19-24 cm?

A

Perpendicular

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12
Q

When measuring ASIS for knee projections, what is the central ray angle at 25 cm and above?

A

5°-7° cephalad

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13
Q

Where do you center for an AP knee projection?

A

Appoint 1/2 inch inferior to patellar apex

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14
Q

What is the IR size and orientation for an AP knee projection?

A

10 X 12
Lengthwise

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15
Q

What is the SID for AP knee projection?

A

40 inch

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16
Q

True or false

The IR is placed on the table top

A

False. It is placed in the Bucky.

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17
Q

Evaluation criteria for AP knee

A

-Entire knee without rotation
-Femoral condyles symmetric and tibia intercondylar eminence centered
-Slight super imposition of the fibular head if the tibia is normal
-Patella completely super imposed on the femur
-Open for femorotibial joint space, with interspaces of equal width on both sides if knee is normal

18
Q

How much do you flex the knee for a lateral knee projection?

A

20°–30°

19
Q

Where is the central ray for a lateral knee projection?

A

Directed to the knee joint 1 inch distal to medial epicondyle and an angle of 5-7° cephalad

20
Q

In the lateral recumbent position (for lateral knee), the medial condyle is slightly inferior to the ____________.

A

Lateral condyle

21
Q

In the lateral projection of the knee, the patella is ______________.

A

In profile

22
Q

In a lateral knee projection, the femoral condyles should be ________________.

A

Superimposed

23
Q

What is the result of overrotation toward the IR for a lateral knee?

A

The anterior surface of medial condyle is closer to patella

24
Q

What is the result from under rotation away from the IR for a lateral knee?

A

The anterior surface of medial Condi is farther from patella

25
Q

What is the results from insufficient cephalad central right angle in a lateral knee projection?

A

The inferior surface of medial condyle Caudal to lateral condyle

26
Q

What is the result of too much cephalad central right angle in lateral knee projection?

A

The inferior surface of lateral condyle Caudal to medial condyle

27
Q

Why do we do the AP knee weight-bearing method standing projection?

A

They found that a weight-bearing study often reveals narrowing of a joint space that appears normal on a non-weight-bearing study

28
Q

How far do you rotate the extremity for an AP oblique medial rotation of the knee projection?

A

45°

29
Q

Where is the central ray directed for an AP oblique medial rotation of the knee projection?

A

1/2 inch inferior to patellar Apex

30
Q

Evaluation criteria for AP oblique knee with medial rotation

A

-Posterior tibia
-Lateral condyles of the femur and tibia
-Both tibial plateau’s
-Margin of the patella projecting slightly beyond the medial side of the femoral condyle

31
Q

Why do we do the Holmblad method?

A

To see intercondylar fossa

32
Q

What is the name of this projection?

A

Holmblad method

33
Q

What is the degree angle of the femur to the IR for the Holmblad method?

A

70°

34
Q

Why do we do the Camp–Coventry method?

A

To open intercondylar fossa

35
Q

What is the name of this method?

A

Béclère Method.

36
Q

Why do we do the Béclère method?

A

To see the intercondylar fossa

37
Q

True or false

A PA projection of the patella can be done

A

True

38
Q

Why do we do the lateral projection with mediolateral rotation of the patella?

A

To see open patellofemoral joint space

39
Q

What is the name of this method and why do we do it?

A

Hughston Method. To see the patella in profile.

40
Q

What is another name for the sunrise method?

A

Settegast method

41
Q

What is the patient position for the sunrise method?

A

Seated or laying down

Positioning (6 decks)

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