unit 3 humerus

Question 1

what are the 2 most important landmarks on the humerus for rotational views

Answer 1

greater tubercle and lesser tubercle

Question 2

how will the humerus appear w external rotation

Answer 2

-GT in profile on lateral side of humerus
-LT on anterior surface medial to GT
-head slight overlap w glenoid cav

Question 3

how will the humerus appear w internal rotation

Answer 3

-GT on anterior surface of humerus (in the middle)
-LT in profile edially
-head overlaps glenoid cav more

Question 4

how will the humerus appear w in neutral? when would we do this?

Answer 4

do this in traume scenarios where pat cant rotate

-GT and LT anterior on head
-epicondyles 45 degrees to IR
-palm to thigh

Question 5

routine projections for te humerus

Answer 5

AP and lateral (lateromedial)

Question 6

when is a grid used?

Answer 6

used for body parts 10cm or thicker. typically used for humerus and shoulders

Question 7

rad gen procedures for AP humerus

Answer 7

-remove jewelry, clothes, and undergarments
-pat in gown open to back
-stand pat upright infront of bucky
-SID 100cm

Question 8

AP humerus positioning

Answer 8

-rotate body twrds affected side to ensure contact w IR
-abduct arm and supinate hand until elbow in tru AP or epis are parallel to IR
-center humerus to IR and CR perp to mid humerus
-resp is suspended
-collimation included elbow and shoulder

Question 9

AP humerus eval criteria

Answer 9

AD:
-entire humerus, elbow, shoulder jts

P:
-GT in profile laterally
-head slight overlap w glenoid cav
-epis in profile
-prox radius slight overlap w ulna

Question 10

how can you tell and AP humerus is externally rotated

Answer 10

• epicondyles distorted and radius is NOT overlapping ulna

Question 11

how can you tell and AP humerus is internally rotated

Answer 11

-GT not in profile on lateral surfac e
-epis distorted
-rad and ulna are too overlapped
-coronoid pro in profile

Question 12

what are the 3 ways we can do a lateral humerus

Answer 12

lateromedial - arm internally rotated until epis are perp to IR
lateromedial - arm into rotated and abducted away and hand tucked by pelvis
mediolateral - arm flexed at 90 degrees and abducted away from body (easiest for pat)

Question 13

how do you position for a mediolateral humerus

Answer 13

-pat facing bucky
-abduct affected arm and flex elbow at 90 degrees
-rotate pat to ensure humerus parallel to IR
-humerus centered to IR and CR perp to mid humerus
-resp is suspended

Question 14

evaluation criteria for mediolateral humerus

Answer 14

AD:
-entire humerus included elbow and shoulder

P:
-superimposed epicondyles
-LT in profile medially and sup imp w glenoid cav

Question 15

what is the TRAUMA routine for humerus

Answer 15

AP w neutral rotation and transthoracic lateral

Question 16

how do you position for a transthoracic lateral projection

Answer 16

-affected side in neutral pos and parallel to IR
-raise opp arm and place hand on top of head
-center affected humerus to IR
-CR directed thru thorax to mid shaft of humerus
-resp is suspended on inspiration or orthostatic

Question 17

evaluation criteria for transthoracic lateral projection

Answer 17

AD:
-affected humerus and articulation thur thorax

P:
-humerus is anterior to T spine vertebrae