Hip test Flashcards
What are the two holes on the pelvis called?
Obturator foramina
What is the large hole called?
Cavity or inlet or true pelvis
4 parts of the hip bone
Ilium on top
Ischium on outer
Pubis inner
Acetabulum is where femur head sits and where previous three meet
What is another name for the iliac wing?
Ala
What are the two sections of the pubis?
Superior ramus and inferior ramus
What is the section on the ischium that is to the right of the inferior ramus on the pubis?
Ischial tuberosity
Eval criteria for AP pelvis
Entire pelvis and proximal femoral included
No rotation of pelvis
Lesser trochanters not visible (or minimal)
How to do bilateral modified cleaves projection
Abduct femora 20-30 degrees-less distortion of femoral neck
CR 3 inches below level of ASIS
Eval criteria for modified cleaves
Pelvic girdle centered horizontally
No rotation of pelvis
Lesser trochanters equal in size
Great trochanters superimposed over femoral neck
Eval criteria AP unilateral hip and proximal femur
Proximal 1/3 of femur included
Hip joint space and acetabulum visualized
Lesser trochanters not visible
What happens to the femoral neck on a frog leg projection when the leg is abducted at 90 degrees?
The femoral neck is forshortened
What is best degree of abduction of leg for frog method?
30 degrees
What projections do you do for suspected fracture or dislocation of pelvis?
Limited AP and axiolateral (danelius-Miller)
Injury that occurs on the opposite side of impact?
Contrecoup
If laying on back and one foot splayed out when other is normal what does that mean?
Fracture of hip
When do you do bilateral modified cleaves?
Children with hip dysphasia
What position shows the anterior ilioichial column and posterior rim?
LPO downside Judet
What position shows posterior ilioschial column and anterior rim?
RPO downside
How position AP axial inlet projection?
CR 40 degrees caudad (toward feet) at level of ASIS
Eval criteria for AP axial inlet
Ischial spines demonstrated and equal
Pelvic inlet centered
How do AP axial outlet projection?
CR cephalad (toward head) 20-35 (males) or 30-45 (females)
CR centered 2 inches distal to symphysis pubis
Eval for AP axial outlet
Elongated and magnified pubic and ischial bones
No rotation of pelvis
Pubic and Ischial bones centered to collimation field
Condition that occurs when there is loss of blood to the bone
Avascular necrosis (AVN) Or aseptic necrosis
Most commonly occurs in hip
Axiolateral (inferosuperior) danelius-Miller method
CR perpendicular to midfemoral neck
IR parallel to alignment of anatomic neck
Eval criteria for danelius-Miller
Entire femoral head, neck, and acetabulum visualized
No visible grid lines
Compensating filter recommended