Shoulder Girdle Flashcards
Where does the greater tubercle lie on the humerus
Superior aspect
IF the arm is internally rotated, where is the lesser tubercle moved?
Laterally to the proximal border
Amount of patient rotation for a Grashey view
35 degree
Amount of rotation for a Lateral scapula view
60 degree,
Collimation for AP shoulder: internal, neutral and external
collimate to 24x30 IR.
Which shoulder rotation projections the lesser tubercle in profile and which doesnt project either tubercle in profile
Internal = lesser
Neutral = neither.
What should the scapula be free of in a lateral scapula projection?
Ribs SI.
Image used when patient cant move at all?
Transthoracic Humerus.
Angulation for AP axial clavicle
15 cephalad. (ensure to mark the image as angulated)
What breathing should be used on a AP of AC joint?
Expiration
Arm postiong for lateral humerus
INTERNAL rotation. need to SI condyles.
Why may a lateral humerus need 2 projections?
Prox and Distal humerus can have a differnt window width.
Which type of AC joint dislocation isnt radiographically present?
Type 1
What is anotehr name for the scapula outlet projection?
Neers
Angulation for Neers
LAteral scapula with 15 caudad angulation
Why is more angulation less preferable for a lawerence projection?
Means the IR has to be pushed further into patients neck
Which projection shows Hill-Sachs lesion and lesser tubercle defects the best?
Lawerence
Which projection shows Bankart and geloind rim # the best?
West point.
Typical # to scapula?
Comminuted #
95% of humeral head dislocations move which way?
Anteriorly
THe two types of consent
explicit and implied
WHy does FFD have to be increased for projections for patients with broader shoulders?
to decrease magnification
Best projection to visualise the greater tubercle?
Grache.
Common sites for insufficency and pathological #
Inter trochanter of femur
Humeral head
VErtebral body
Hill-Sachs defect
Greater tubercle (posterolateral aspect of humerus) collides with anterior glenoid cavity causing a decompression
Bankart lesion
Avulsion # to anteroiferior glenoid rim.
Labrum tears, Perthes lesion of labrum.
Predisposes to further dislocations
Which direction does a AC joint typically dislocate?
Superiorly.
Best projection for AC dislocation?
Neers or AC weight bearing
Adhesive capsulitis
frozen shoulder
Ultra sound or MRI.
Projection used for rotator cuff tear
AP + Neers
muscle typically damaged during rotator cuff tear and where it inserts?
Supraspinatus , greater tubercle.
How are clavicle fractures treated and what is the MOI
Conservatively unless vasculature underneath is compromised..
Bike, Motorcycle and falls . Coronal/ axial
