Test 3 - Sacrum, Coccyx, and SI joints

Question 1

How is the coccyx joint to the sacrum?

Answer 1

via cartilage

Question 2

What type of joint are SI joint? At what sgree are they? Held togetehr by?

Answer 2

Ampiarthrodial synoval joint
Oblique 30 degrees
Held together by ligaments and cartilage

Question 3

AP axial sacrum

kV, Pt. pos, CR, Breathing

Answer 3

75-80 kV
Supine + legs extended
CR 15 degrees cephalic, midways b/w ASIS and symphysis
- if done PA, 15 degrees caudal
Suspended respiration

Question 4

AP axial coccyx

kV, Pt. pos, sheilding, CR, breathing

Answer 4

75-80 kV
Supine + legs extended
CR 10 degree caudad, 5cm superior to SP
Suspended respiration
Sheilding if possible

Question 5

Lateral sacrum and coccyx

kV, Pt, pos, sheilding, CR, breathing

Answer 5

85-95 kV
sheilding - lead mat behind pt.
True lateral - knees flexed, no rotation
CR perpendicular, 8-10cm posterior to ASIS
- if coccyx only, 8-10cm posterior & 5cm inferior to ASIS
Suspended respiration

Question 6

AP axial SI joints

kV, CR, Breathing

Answer 6

80-90 -kV
CR - MSP 5cm below ASIS
- males 30 deg cephalic
- females 35 deg cephalic

suspended respiration

Question 7

AP axial L5-S1 vs SI joints

kV, CR, CP

Answer 7

L5-S1:
kV - 85-90
males 30 deg cephalic
females 35 deg cephalic
CP ASIS

SI joints:
kV - 75-80
males 30 deg cephalic
females 35 deg cephalic
CP 5cm inferior to ASIS

Question 8

SI posterior obliques

(AP obliques) - kV, Pt. pos, CR, breathing, collimation

Answer 8

80-90 kV
supine or erect, obliques pt. 25-30 degrees
CR perpendicular, 2.5cm medial to elevated ASIS
suspended respiration
collimation - smarties box