Flashcards in Common injuries/growths/biologic errors Deck (18):
- Fracture of wrist at distal end of radius, causing fragments to displace dorsally and radially
- Result of fall from outstretched hand
- "Silver fork" deformity results
Scaphoid bone fracture
When someone braces fall with dorsiflexed hand
- Fracture through base of 1st metacarpal
- caused by force applied to end of thumb, involves dislocation of the metacarpal joint
- fracture through neck of 5th metacarpal
- obtained by striking an object with clenched fist
Deformaties involving the MCP and PIP joints
- Soft tissue inflammation with resulting muscle imbalance
RA: Ulnar drift deformity
MCPs are first joints involved.
Synovitis around MCPs creates ligamentous instability
Extensor Digitorum loses its central pull and MCP flexors pull in an ulnar direction
RA: Swan neck deformity
Hyperextension of PIP joint and flexion of DIP joint
Synovitis at MCP joint causes intrinsic muscles to shorten or weaken
Leads to excessive pull for hyperextension of PIP
RA: Boutonniere Deformity
Hyperextension of DIP and flexion of PIP
Synovitis of PIP joint erodes the central slip of ED, thus no longer able to pull on middle phalanx
Reproduce carpal tunnel sensation with sustain wrist flexion
If ulnar nerve was severed at elbow, all of these would result:
- ulnar claw hand
- hypothenar eminence atrophy
- atrophy of interossei
- positive Froment's Sign (inability to grasp paper between the thumb and radial side of palm)
- loss of sensation of the ulnar aspect of hand
- loss of power grip
Common compression sites for Ulnar nerve?
- Cubital tunnel (where Ulnar nerve passes medial epicondyle)
- Guyon's Canal (path between pisiform and hamate)
This nerve is most commonly injured with mid-humeral fractures
Is radial nerve severed, these result:
- weakness in brachioradialis, all distal extensor musculature for wrist, finger, and thumb extension, and abductor pollicis longus
- Total "wrist drop"
Compression of radial nerve is most common in the ________ and called "___________"
axilla; "saturday night palsy"
Finger lockes in flexed position, and can be extended with difficulty resulting in "popping" sound
Painful tenosynovitis affecting abductor pollicis longus and extensor pollicis brevis in their common sheath passing over the radial styloid to the thumb
Test for DeQuervain's Disease?
Finklestein's Test - have patient make fist around thumb, flex elbow, and then passively ulnarly deviate fist. If positive, patient will experience pain