skills Flashcards
(66 cards)
what makes up the concentric arcs on a lateral elbow?
- medial trochlea
- trochlear sulcus
- capitulum
is the radial tuberosity in profile on a lateral elbow?
no
how do you know when the wrist has been pronated on a lateral elbow
when the radial tuberosity is in profile posteriorly.
how do you know when the wrist has been externally rotated on a lateral elbow?
the radial tuberosity is in profile anteriorly
how could you tell if the proximal humerus was too elevated on a lateral elbow?
the radial head would be too posterior to the coronoid process and therefore the capitulum would be too distal to the trochlea
how could you tell if the proximal humerus was too depressed on a lateral elbow?
the radial head would be anterior to the coronoid process and the capitulum would be too proximal to the trochlea.
if the radial head is too distal to the coronoid on the lateral elbow, what is the positioning error?
the forearm was depressed, you have to raise the forearm.
if the radial head is too proximal to the coronoid process on a lateral elbow, what was the positioning error?
the forearm was too elevated, depress the forearm.
where is the greater tubercle and the humeral head seen on the humerus when the hand is supinated?
greater tubercle seen laterally, and humeral head medially
where will the lesser tubercle be demonstrated on a lateral humerus?
medially
will the anterior capitulum and medial trochlea be aligned on a lateral humerus?
no, nearly aligned.
where is the radial tuberosity seen when the hand has been externally rotated on a lateral elbow?
anteriorly
where is the radial tuberosity seen when the hand has been internally rotated on a lateral elbow?
posteriorly adjacent to the ulna.
how does a dislocated shoulder appear on an AP shoulder?
glenoid cavity is partially demonstrated with the humeral head inferior to the cavity.
where is the greater tubercle and humeral head seen when the arm is in neutral rotation?
partially in profile laterally and humeral head partially in profile medially.
what tubercle of the humerus is visualized when it is internally rotated, and where?
lesser tubercle visualized medially and humeral head superimposed by the greater tubercle.
how much should the body be obliqued for a grashey method shoulder?
35-45 degrees towards the affected shoulder
where will the coracoid process appear on a grashey method shoulder if there was anterior tilt?
inferior to the glenoid.
where will the coracoid process appear on a grashey method shoulder if there was posterior tilt?
superior to the glenoid.
how can you tell if the body has been over rotated on a grashey method shoulder vs underrotated?
the joint will be closed for both but:
overrotation = coracoid process more than 0.25” superimposed on humeral head
under rotation = corocoid process less than 0.25” superimposed over humeral head
where should the superior scapular angle be in relation to the clavicle on a PA scapular Y shoulder?
at the same transverse angle.
where do you center for an AP shoulder vs a AP scapula?
shoulder: 1” inferior to the coracoid process
scapula: 2” inferior to coracoid process
what makes a good foot AP oblique?
- tarsi sinus open
- 5th MT tuberosity in profile
- cuboid cuneiform joint open
- open 2-5 intermetatarsal joint spaces open
what tarsal bones joints should be open on an AP axial foot?
navicular cuneiform
