Lower Extremities Flashcards
What is the CR for AP axial of the foot?
10 degree toward the heel
Base of the 3rd metatarsal
How much is the foot rotated for medially oblique? What is best demonstrated?
30 degrees
Demonstrates lateral structures
What view best demonstrates the joint viability of the foot and the longitudinal arch?
Lateral weight bearing
What is the CR for axial calcaneus?
40 degrees
Base of 3rd metatarsal
What is the CR for AP ankle?
Mid-malleolar region
What is the rotation for AP oblique mortise?
15-20 interally rotated
How much rotation is needed to separate the distal tib/fib?
45 degree internally
When is an AP stress projection needed for the ankle?
After an inversion or eversion injury to verify the presence of a ligament tear
What is the weight bearing portion of the lower leg?
Tibia
What is the CR parallel with in AP knee?
Tibial plateau
AP knee - what angle is needed for a patient with a thin pelvis (<19 cm)
3-5 caudal
AP knee - what angle is needed for a patient with an average pelvis (19-24cm)
0 degree
AP knee - what angle is needed for a patient with a large pelvis (>24 cm)
3-5 cepahlic
How much is the knee joint flexed for lateral knee projection?
20-30 degrees
What is the CR for a lateral knee projection?
5-7 degrees caudal; 1/2” below medial epicondyle
What does AP weight bearing knees demonstrate?
Menisci, joint spaces, arthritis
What does a medial oblique knee demonstrate?
Open proximal tib/fib joint space
PA Axial - intercondylar fossa is also known as what view?
Tunnel
How is a patient positioned in the Homblad method?
Patient kneeling on all fours; femur is 70 degrees from the IR
How is a patient positioned in the Camp Coventry method?
Patient is prone with the femur in the same plane as the IR; Knee flexed so the leg forms a 40 degree angle; CR matches lower leg angle
How is a patient positioned in the Beclare method?
One knee flexed approx 30 degrees and the CR perpendicular to the shaft of the lower leg
What is the CR for a lateral patella?
Patellofemoral joint space
What is demonstrated in a lateral patella?
Transverse fractures
What is demonstrated in a Merchant view?
Patella and vertical fractures
What is demonstrated in a Settegast view?
Vertical fractures
Should transverse or vertical fractures be ruled out first?
Transverse
