Chp 6 Exam Flashcards
Which one of the following is not why we would do an AP stress study on an ankle
A. To demonstrate a ligament tear.
B. To demonstrate a ruptured ligament.
C. For an inversion and inversion.
D. To demonstrate a Fx of a distal tibia fib
D. To demonstrate a Fx of a distal tibia fib
What is the difference between a mortise and an oblique ankle?
Mortise is 15 to 20° medial rotation until intermalleolar line is parallel to IR.
Oblique is 45° medial rotation and distal, tibiofibular joint open with no or only minimal overlap.
Which ankle view has the intermalleolar line parallel to IR?
Mortise
Which malleolus is superior
Medium malleolus
What type of joint is the ankle?
Synovial joint of the saddle (sellar) type with flexion and extension movements only
Which tarsal bone makes the mortise?
The talus
Even if you have a trauma patient, which positioning maneuver is necessary to properly position for a lateral ankle?
A. To ensure the plantar surface is in complete contact with the IR
B. To ensure the plantar surface is perpendicular to the IR
C. To rotate the leg laterally until the knee is against the table.
D. To plantar flex the foot
B. To ensure the plantar surface is perpendicular to the IR
When the patient is standing with metatarsals of the foot in a 90° flexion to the leg with a horizontal beam entering the lateral malleolus, what type of weight-bearing projections of the ankle, are we obtaining?
Lateromedial
What is the most posterior part of the calcaneus?
Tuberosity
What is the CR for a plantodorsal (axial) projection: calcaneus. Is the CR caudad
or cephalic?
Angled 40° cephalad from long axis of foot
In the axial calcaneus, is the plantar surface, parallel or perpendicular to the image receptor?
Perpendicular and dorsiflexed
Where is the sustentaculum tali?
Calcaneus
When performing a lateral on second digit of toe, what surface should rest on IR?
Medial - side with least amount of OID
Medial cuneiform articulates distally with what?
First metatarsal
What do the heads of the metatarsal articulate with?
Proximal phalanges
What do the basis of the metatarsal articulate with?
Tarsals
Where are the sesamoid bones located?
Plantar surface at the head of the first metatarsal
Which of the following is not true in looking at a lateral foot?
A. Include at least one inch of distal tib fib.
B. Superimposition of heads of metatarsals.
C. Cuboid free of super imposition.
D. Visualize entire foot from digits to calcaneus.
B. Superimposition of heads of metatarsals.
If looking for foreign body, do we angle the CR?
No. We want to take it as is because an angle made distort the length of the object.
What does Pes Planis mean?
Flat foot. No arch.
True or false: image critique for oblique foot with lateral rotation, we want to see the sinus Tarsi free of super imposition
False. You would see base of the first metatarsal.
View of the foot would you see the sinus Tarsi?
Oblique foot with medial rotation
How many tarsal bones are in one single foot? Name them.
- Calcaneus, talus, navicular, medial cuneiform, intermediate cuneiform, lateral cuneiform, and cuboid
If patient’s foot cannot be flat in a lateral projection, can we use a wedge? What is the angle?
Yes, a wedge can be used. There would be no angle.
