UE part II - Exam 1 Flashcards
(161 cards)
What are the 3 distinct joints in the elbow?
Ulnohumeral and Radiocapitellar Articulation
Proximal Radioulnar Articulation
How are AP views of the elbow shot?
How are lateral views of the elbow shot?
How are oblique views of the elbow shot? What are you trying to visualize?
Oblique (Radiocapitellar) 45° view
shot to improve radial head visualization
How do you interpret a lateral view of elbow imaging?
The anterior humeral line (1-2) should bisect the middle third of the capitellum.
The radiocapitellar line (drawn through the center of the radius, 3-4) should also pass through the center of the capitellum
if not normal, may indicate fracture
What is normal elbow flexion in degrees? Supination/pronation?
Flexion 0-150°
supination/pronation: 80 degrees
What muscle and nerve are responsible for flexion and supination of the elbow?
Bicep, C5-C6, musculocutaneous nerve
What muscle and nerve are responsible for extension of the elbow?
tricep, C7-8
What muscle and nerves are responsible for pronation?
Pronator teres muscles, median nerve, C6-C7
How do you perform the vaLgus stress test? Which ligament are you testing?
Hold the elbow in 20° flexion with the forearm in supination, apply pressure on the lateral side of the elbow to increase the pressure on the medial ligament
testing medial ligamentous structure
How do you perform the varus stress test? What ligament are you testing?
Hold the elbow in 20° flexion with the forearm in supination and apply pressure on the medial side of the elbow, attempting to open the lateral joint line
testing the lateral collateral ligament
In relation to the body, is valgus pulling the hand towards or away from the body?
away
In relation to the body, is varus pulling the hand towards or away from the body?
towards
What are the 3 different fracture patterns of the distal humus? Which one is MC overall? MC in children?
Supracondylar (MC in children) - Type A
Epicondylar (medial or lateral) - Type B
Intercondylar - Type C (MC)
What type of fracture?
type A
supracondylar distal humeral fx
What type of fracture?
type B
Epicondylar (medial or lateral) distal humeral fx
What kind of fracture?
Type C
intercondylar distal humeral fx
If the ulnar nerve motor was damaged in a distal humeral fx, what would the pt NOT be able to do?
Flexion/adduction wrist, 4th and 5th DIP joint flexion, finger abduction
If the radial nerve motor was damaged in a distal humeral fx, what would the pt NOT be able to do?
wrist extension
pain, swelling, tenderness
limited elbow ROM
shortening of arm with displaced shaft
What am I?
distal humeral fx
If the fx is supracondylar, what artery and nerve are likely to be involved?
radial artery and median nerve
If the fx is medial epicondylar humeral, what nerve is likely to be involved?
ulnar nerve
If the fx is lateral epicondylar humeral, what nerve is likely to be involved?
radial nerve
When assesses _____ humeral xray, you see a fat pad “sail sign,” what does that indicate? What can it point to? What is the MC population?
distal
Indicates intra-articular bleeding
May be evidence of an occult fracture
MC seen in kids
fat pad “sail sign” is NOT unique to distal humeral fx, also need in radial head/neck fx