Ch. 9 Sacrum and Coccyx Flashcards
The sacrum is formed by _____
Fusion of five sacral segments into curved, triangular bone
The sacrum is wedged between:
Articulation with?
Iliac bones of the pelvis
- Sacroiliac joints (SI)
The coccyx is formed by ____
Fusion of three to five rudimentary vertebrae
The coccyx curves ___ and ___ from the articulation with the ____
- Inferiorly
- Anteriorly
- Sacrum
What are the projections for the sacrum and coccyx?
AP Axial and Lateral
How many segments are there in the sacrum?
Five
For the lateral projection of the coccyx, the CR is directed to enter:
CR; perpendicular and directed towards a point 3.5 inches posterior to the ASIS and 2 inches inferior
What is the breathing respiration for AP Axial projection of the coccyx?
Suspend
What size image receptor is used for the AP and Lateral sacrum and coccyx projections?
10 x 12 lengthwise
What is the SID for the AP Axial and lateral projection of the sacrum and coccyx?
40 SID
The pelvic and sacral column is considered, true or moveable, false or fixed?
Fixed Vertebrae
How is the CR angled and directed for the AP Axial projection of the sacrum?
Supine: 15 degrees cephalad and center to a point 2 inches superior to the pubic symphysis
Prone: 15 degrees caused and center to the visible sacral curve
For a lateral projection of the sacrum, the CR is directed and enters:
Perpendicular and directed to the level of the ASIS and to a point 3.5 inches posterior
S1-S2
Level of anterior superior iliac crest (ASIS)
Coccyx Landmarks
level of pubic symphysis and greater trochanters
