Hip & SI Flashcards
An RPO AP of SI joint demonstrates which SI joint?
Left
Which side is elevated and on the image, with and RPO and LPO AP of SI joint?
The side of interest
Where do center the IR during an RPO and LPO AP SI joint?
At level of ASIS
Where is the central Ray directed for an RPO and LPO AP SI joint?
Perpendicular to 1” medial to the upside ASIS
What structures are seen in an RPO AP of SI joint?
Left SI joint open
Ala of ilium and sacrum not overlapped
How do you position an RAO and LAO PA of SI joint?
Prone
Elevate unaffected side 25-30 degrees.
What side do we visualize during an RAO and LAO PA of SI joint?
The side that is down and closest to the IR.
Where do you aim the central ray for an RAO and LAO PA of SI joint?
Perpendicular to 1” lateral to vertebral spinous process
At level of ASIS
How much do you oblique the hip for LPO & RPO of SI joint?
25-30 degrees
What is the routine for SI joints?
AP axial sacrum
Bilateral posterior obliques
How to position for AP Axial Sacrum
Supine
Align MSP to midline of table and CR
No rotation of ASIS
How is the central Ray for AP axial sacrum?
15 degrees cephalic to MSP between ASIS and symphysis pubis.
Structures seen on AP axial sacrum?
A non-forshortened AP projection of the sacrum, 2 SI joints, and L5-S1 junction.
How do you adjust the IR for a Danelius Miller?
Top of cassette at level of iliac crest.
Adjust IR so it is parallel to femoral neck.
Central Ray for Danelius Miller?
It is perpendicular to IR and mid femoral neck.
How to position for Sanderson method?
Supine
Oblique pt by propping up affected hip 20-30 degrees.
Rotate leg out about 15 degrees.
How is the IR for Sanderson
LW
Parallel to long axis of foot
Adjacent to hip and propped up at an angle
How is the central Ray for Sanderson
Perpendicular to IR enters at femoral neck.
Angle CR mediolaterally, and perpendicular to long axis of the foot.
How to position for Clements nakayama?
Supine
Affected side close to edge of table
Leg in neutral position
How is IR for Clements nakayama?
Propped up in open Bucky tray.
Tilt 15-20 degrees from vertical.
How is central Ray for Clements nakayama?
CR angles 15-20 degrees from horizontal.
30-40 degrees mediolateral
Center to enter femoral neck perpendicularly
Routine for acetabulum
AP oblique
RAO or LAO
How do you position patient for acetabulum
Semi-prone on affected side
Unaffected hip is elevated 30 to 45 degrees
Central Ray for acetabulum
Directed 12 degrees cephalic to acetabulum
2” laterally to MSP at inferior level of coccyx
