Flashcards in Week 2 Learning Deck (46):
how can you recognize a skeletally immature pelvis XR?
triradiate cartilage still open
what does the teardrop represent
medial wall of acetabulum.
Iliopectineal line represents
anterior column of acetabulum
ilio-ischial line represents
posterior column of acetabulum
acetabulum is tilted which way
Shenton's Arc (or line)
important on AP pelvis
helps w/determining if there is a dislocation. would be broken in dislocation
AP pelvis skeletally imature lines
Hilgenreiner's line - describe
Horizontal line through triradiate cartilage
Perkins line - describe
perpendicular to hilgenreiner's line, through lateral most aspect of the acetabular roof
in relationship to hilgenreiner's land perkins' lines, where should a normal hip be?
below hilgenreiner's line and medial to perkin's line
what pelvis view is basically a straight AP view of sacrum?
pelvic outlet view.
On pelvic outlet view, what should line up with S2?
Judet views are named based on
the injured side
judet views are
obturator oblique is the view you would want to evaluate the
anterior column, which is the iliopectineal line
also view you want for posterior wall.
iliac oblique is the view you would want to evaluate the
also posterior column, which is the ilioischial line
how to remember judder view
p/w: posterior wall
O: obturator oblique
what 3 views should you get for the ankle?
how does mortise differ from AP
you internally rotate at knee a little to get the toes to point forward. to get purely anterior of mortise
what indicates a good lateral view of the ankle?
look at the talar dome, make sure it has good overlap with tibia
How can you tell if you have an AP view of scapula?
scapula is protracted forward a little - 30 degrees of ante version
what shoulder view would overcome the anterior tilt of the scapula?
any time you are evaluating congruency of glenohumeral joint, you should get what view
this view tells you where the glenoid and humerus are articulating
If it's too hard to abduct arm for axillary view - get a?
other than a dislocation, an axillary view can show you
bony bankart lesions
describe a scapular Y view of the shoulder
looking down the plane of scapula
the corocoid, accromion and shaft of humerus form a Y shape
What is a Y view good for?
evaluation of shoulder pain, esp in impingement syndrome... you could look at the hook of the acromion
what kind of film is good to get (in particular) when evaluating osteoarthritis of the knee, and why?
WT BEARING AP
because it shows what they are actually experiencing in their knee when they are standing
How do you know if a film is wt bearing
look for the bb circle. if they are all stacked on the bottom= weigh bearing. (cassette was upright. as opposed to flat where bb's would be distributed randomly)
sunrise view of knee shows
good lateral of the knee will show?
overlapping of femoral condyles
Blumensat's line is basically what? and what lives there
basically the notch of the knee
cruciates live there
What are the sesamoid bones of the knee?
where is the fabella found
head of the lateral gastroc
Where does the fibula live in relation to the tibia
The Harris View looks at what bone? What is it used to evaluate
for comminution and widening of calcaneous
Describe the scaphoid view
for evaluating scaphoid fx
requires hand to be ulnar deviated
it extends the scaphoid - so you're looking perpendicular to axis of scaphoid
Coupled movement of radial/ulnar deviation and movement of the scaphoid
ulnar deviation extends scaphoid
radial deviaiton flexes scaphoid
on a PA view, what does the scaphoid look like?
a ring - find sign of scapholunate dissociation
when asked to read an x ray, what do you want know? (2 things)
closed vs open
Lagging produces what type of bone healing?
primary bone healing
Casting will result in what type of bone healing?
Secondary bone healing with relative stability
When using a dynamic compression plate to compress, should you drill away or towards the fracture in the oblong hole?
a one third tubular plate put in after a lag screw in a distal fibula ORIF is used as a
A buttress plate provides what type of compression