Elbow Flashcards
(4) standard views of the elbow
AP
Lateral
Oblique
Jones (Tangential)
the forearm is ___ in AP view
A/P
In lateral view the elbow must be_____
flexed 90 degrees
- and thumb up
Name the two ways to position the arm in oblique view
- just forearm pronated
2. forearm and humerus slightly pronated
the oblique view is distinguished bc of the :____
radius and ulna cross
Jones (tangential) view evaluates the ___
olecranon process
The ulna contacts the ____ on the humerus
trochlea
The radius contacts the ___ on the humerus
capitulum
The radial head view evaluated the ____ & ___
radial head and capitellum
-via tube tilt
What view gives a more unobstructed view of the radial head/ capitulum
radial head view
A long bone study on the elbow would be done to evalvuate the ___ & ___
radius and ulna
___ is the last center of the humerus to fuse
medial epicondyle
____ appears “sliver like” before secondary ossification
lateral epicondyle
Order of fusion of the elbow
capitellum–> radial head –> medial epicondyle –> trochlea –> olecranon –> lat. epicondyle
(come rub my tree of love)
Radial head appears at ___ y/o
and fuses at ___ y/o
5years old
fuses: 16 y/o
Olecranon process appears at ___ yrs
fuses by ___ yrs
9 yrs
fuses: 15 yrs
Name the (3) lines of measurement of the elbow
carrying angle
radiocapitellar line
humeral shaft line (pediatric)
Carrying angle is drawn through:
1st: long axis of the humerus
2nd: long axis of the ulna
carrying angle should be btw __-___ degrees
154-178 degrees
alterations of the carrying angle can indicate: __ or ___
fx or dysplasia
Where do you draw the lines for the radiocapitellar line
lateral view:
Line 1: through center of the radial shaft
Line 2: extend through capitellum
- line should intersect the center of the capitellum at any angle of elbow flexion / extension
Failure to intersect the center of the capitellum indicates :____
radial head dislocation or fx
what pop would you do a coronoid line on?
pediatric
______: an arc-like line is drawn along the coronoid fossa and extended distally . line shoudl barely intersect anterior to the capitellar epiphysis
coronoid line
Alteration in the coronoid line may indicate ____
displacement of the epiphysis
where is the line drawn for the humeral shaft line
Line 1: anterior humeral shaft
- extend through the capitellar epiphysis
- should intersect middle 1/3 of epiphysis
Improper intersection of the humeral shaft line may indicate :
supracondylar fx
or displaced epiphysis
_____: lig. that extends from the distal humerus forming a foramen through whih the median N passes
Struther’s lig
What N passes through the foramen that the struther’s lig makes
median N
______: lack of bone separating olecranon and coronoid fossae of humerus
Olecranon foramen
____: sesamoid bone in the tricep tendon
patella cubiti
_____:seen as lucency in prox radial shaft when seen “en face”
radial tuberosity
trabecular pattern forms a “___”
chevron Sign
humeral, ulnar, and radial nutrient canal all point to ____
toward the elbow
CT is used for the elbow when ____ involvement is suspected
osseous
MRI will be used for the elbow when ____ is involved
Soft tiss
