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.
In an AP projection of the ankle, which of the following is true? There can be more than one.
A. Plantar surface is perpendicular to the IR.
B. Fibula projects, more distally than the tibia.
C. Calcaneus is well visualized.
A. Plantar surface is perpendicular to the IR.
B. Fibula projects, more distally than the tibia.
In a lateral projection of the foot, which of the following is true? There can be more than one.
A. Plantar surface should be perpendicular to IR.
B. Metatarsals are super imposed.
C. Talofibular joint should be visualized.
A. Plantar surface should be perpendicular to IR.
B. Metatarsals are super imposed.
The second metatarsophalangeal joint is what type of joint?
Synovial joint, diarthrodial. Movement type: modified ellipsoidal (condyloid)
How much foot rotation for a mortise ankle?
15 to 20° medial
How much foot rotation for an oblique ankle?
45° medial
Which of the following joints is a fibrous amphiathroadial joint?
A. Proximal phalange
B. Talar navicular
C. Distal Tibial fibular joint
D. Proximal tibial fibular
C. Distal Tibialfibular joint
When to best see a medial displacement Fx?
AP
When to best see a posterior displacement?
Lateral
Name of Fx for base of the fifth metatarsal
Nightstand Fx aka Jones Fx
What joint is most affected by gout?
First MTP joint of the foot
What is gout?
A form of arthritis that may be hereditary. Uric acid appears in excessive quantities in the blood and may be deposited into joints and other tissues.
What is the Don Juan Fx (Lover’s Fx)
Fracture of the calcaneus
What is Osgood-Schlatter Disease
Partial separation of the tibial tuberosity caused by overuse of quadriceps muscles. Most common in boys ages 10 through 15 years old.
During most long bone exams, the part being radiographed should be _____ to IR and ____ to CR
Parallel to IR and perpendicular to CR
What do we call the superior surface of the foot? Is it the anterior or posterior portion?
Dorsum and is anterior
