Shoulder

Question 1

What xray view is best to see a sternoclavicular dislocation?

Answer 1

serendipity, 40 degree caudal tilt

Question 2

classification of lateral third clavicle fractures

Answer 2

type 1: lateral to CC ligaments, no displacement
type 2a: medial to CC ligaments, both intact
type 2b: between CC ligaments, conoid torn, trapezoid intact
type 3: through AC joint, no displacement

Question 3

AC separation, Rockwood grade 1

Answer 3

AC ligament sprain

Question 4

AC separation, Rockwood grade 2

Answer 4

AC tear, CC intact

Question 5

AC separation, Rockwood grade 3

Answer 5

AC and CC torn, <100% superior displacement

Question 6

AC separation, Rockwood grade 4

Answer 6

grade 3 (AC and CC torn) with posterior displacement

Question 7

AC separation, Rockwood grade 5

Answer 7

grade 3 (AC and CC torn) with <300% superior displacement

Question 8

AC separation, Rockwood grade 6

Answer 8

grade 3 with inferior displacement

Question 9

treatment of proximal humerus fractures

Answer 9

1-2 part = non-op, 3-4 part = operative

Question 10

What 4 articulations make up the shoulder?

Answer 10

sternoclavicular, glenohumeral, acromioclavicular, scapulothoracic

Question 11

what muscle protects the radial nerve in the posterior approach to the shoulder?

Answer 11

teres major

Question 12

what muscle divides the axillary artery into 3 parts?

Answer 12

pec minor

Question 13

paralysis of what muscle causes medial winging of the scapula?

Answer 13

serratus anterior (long thoracic)

Question 14

how are the cords of the brachial plexus named?

Answer 14

lateral, medial, posterior, in relation to the axillary artery

Question 15

primary blood supply to humeral head

Answer 15

posterior circumflex humeral artery

Question 16

course from aorta –> brachial artery

Answer 16

aorta > brachiocephalic (R side only) > subclavian > axillary > brachial

Question 17

intervernous plane of anterior/deltopectoral approach to shoulder

Answer 17

deltoid (axillary) and pec major (medial and lateral pectoral nerves)

Question 18

dangers in anterior/deltopectoral approach to shoulder

Answer 18

musculocutaneous nerve, cephalic vein, axillary nerve

Question 19

internervous plane in Judet approach to scapula

Answer 19

infraspinatus (suprascapular nerve) and teres minor (axillary nerve)

Question 20

what anatomic landmark is used to determine the height of prosthesis in a shoulder hemi?

Answer 20

superior border of pec major tendon insertion (can also help with retroversion)

Question 21

what muscle is deficient in lateral scapular winging?

Answer 21

trap