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Knee Anatomy RAD125

QuestionAnswer
What X-Ray positions the knee flexed 70° from full extension? PA Axial Intercondylar Fossa (Holmblad)
Where should the CR be placed for a PA Axial Intercondylar Fossa (Holmblad) X-Ray? The superior aspect of the popliteal fossa
What is the diamond-shaped depression located posterior to the knee joint? Popliteal Fossa (crease of the knee)
What X-Ray positions the affected knee flexed w/femur against IR, flexing the knee 40 - 50° from full extension? PA Axial Intercondylar Fossa (Camp-Coventry)
Describe CR angulation for a PA Axial Intercondylar Fossa (Camp-Coventry) X-Ray Caudal angle matches amount of knee flexion • 50° caudad when knee flexed 50° • 40° caudad when knee flexed 40°
AP Axial Intercondylar Fossa (Béclère) Patient Position • Place the IR on sandbags under the knee • Flex the affected knee so that the femur and extended tibia forms a 60° angle
Holmblad X-Ray places the _______ on the IR? Tib/Fib
Camp-Coventry X-Ray places the _______ on the IR? Femur
Of the 3 Intercondylar Fossa Views, which one has the least amount of distortion? Holmblad
The CR Enters the knee joint ½ inch below the patellar apex when performing a _______ X-Ray Béclère
PA Patella Patient Position • Prone, knee fully extended • A sponge under the thigh may relieve pressure on the patella if needed • Patella parallel to IR • Usually the heel must be rotated 5 -10° laterally to make the patella parallel to the IR
Tangential Patella (Settegast) Patient Position • Patient Seated or Prone • IR against anterior surface of femur • Flex knee until patella is close to perpendicular with IR
The heel should be rotated _______ degrees when performing a PA Patella X-Ray 5 -10° laterally
Which X-Ray requires the CR placed perpendicular to joint space, Usually at a 15 - 20° cephalad angle? Tangential Patella - Settegast
Which Patella X-Ray requires a special device? Tangential Patella - Merchant
The Patella is completely superimposed by the femur in a ________ X-Ray PA Patella
Characteristics of Synovial Joints Surrounded by a dense fibrous articular capsule
The inside membrane of the capsule is the? Synovial Membrane
Characteristics of Synovial Joints The bone ends are covered with articular cartilage
The synovial membrane makes ______to lubricate the joint Synovial Fluid
Attaches bone to bone Ligament
Attaches muscle to bone Tendon
Shock Absorber Meniscus
• Fluid filled sac, Friction reducer • Allows smoother gliding of tendons & muscles over bone or ligaments Bursa
Where should the CR be centered for a PA Axial Intercondylar Fossa (Camp-Coventry) X-Ray? Knee Joint
Placing the anterior surface of the tibia parallel to the IR creates a? Consistent angle of knee flexion
Where should the CR be placed for a PA Patella X-Ray? Perpendicular to the mid-popliteal area/crease exiting the patella
Created by: user-2016295
 

 



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