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img crit posit leg 2
image critique positioning lower leg 2
| Question | Answer |
|---|---|
| AP femur eval criteria | majority of femur nearest site of injury, femoral neck not foreshortened, lesser trochanter not seen, no rotation of the knee, gonadal shielding does not obscure anatomy, orthopedics in its entirety |
| CR entry and tube angles for AP knee | entering ½” below the patellar apex, 3-5 degrees cauded far thin patient (pelvis < 19 cm), perpendicular for average patients (pelvis 19-24 cm), 3-5 degrees cephalad for large patients (pelvis >24 cm) |
| CR entry and tube angle for lateral knee | 5-7 degrees cephalad entering 1” below the medial epicondyles |
| Degree of rotation for a lateral oblique of the knee | 45 degrees externally |
| Degree of rotation for a medial oblique of the knee | 45 degrees internally |
| Positioning for AP hip | internally rotate the affected limb 15-20 degrees |
| CR entry point for an AP hip | perpendicular to a point 2 1/2” distal to a line drawn from the ASIS to the PS |
| CR entry lateral (“frog-leg”) hip | perpendicular to a point midway between the ASIS and PS |
| Eval criteria for an AP hip | femoral head seen through acetabulum, ilium and pubis seen at pubic symphysis, greater trochanter in profile, entire long axis of femoral neck without foreshortening, proximal third of femur, little or no lesser trochanter seen |
| Eval criteria for a lateral hip | hip joint centered, hip joint and acetabulum, and femoral head included, femoral neck superimposed by greater trochanter |
| Structures shown for a x-table lateral hip | acetabulum, head, neck and trochanters demonstrated. |
| Eval criteria for a x-table lateral hip | femoral neck without overlap of greater trochanter, small amount of lesser trochanter posteriorly, small amount of greater trochanter anteriorly and posteriorly, sift tissue of unaffected leg out of anatomy, ishial tuberosity below the femoral head |
| AP pelvis eval criteria | lesser trochanters seens medially, femoral necks not foreshortened, greater trochanters in profile, no rotation, greater trochanters equidistant, lower vertebral column centered, sacrum and coccyx aligned with pibic symphysis |
| AP pelvis positioning and CR entry | internally rotate the lower limbs 15-20 degrees, center 2” inferior to the ASIS or superior to the PS |
| How do we determine direction of rotation on an AP pelvis? | ala and obturator foramen should be symmetric, a wider flattened ala and narrow or smaller obturator foramen will indicate the side down. |
| On an AP pelvis, if the right obturator foramen appears larger and more open than the left this means what? | the right side is elevated |
| On an AP pelvis, if the right ala appears narrower than the left, this means what? | the right side is elevated |
| lateral femur eval (proximal) | (proximal) opposite thigh out of anatomy, (proximal) greater and lesser trochanter not prominent |
| lateral femur eval (distal) | (distal) superimposed anterior femoral condyles, (distal) patella in profile, (distal) open patellofemoral joint space |
Created by:
annaluz87
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