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Flashcards in Part 6 Deck (30)
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1
Q

triquetral fracture

A

usually an avulsion from the dorsal surface at the site of attachment of the radiotriquetral and ulnotriquetral ligament

2
Q

which view are triquetral fractures easiest seen?

A

lateral

3
Q

what is the second most common carpal fracture?

A

triquetral

4
Q

third most common fracture of the carpals?

A

hamate

5
Q

what part of the hamate is usually fractured?

A

hook of hamate

6
Q

how does a hamate get fractured?

A

direct blow to the hypothenar eminence or sports holding onto clubs, bats, rackets, etc

7
Q

best view to see a hamate fracture/

A

PA wrist

8
Q

most common carpal dislocation

A

perilunate dislocation

9
Q

what is the 3 “C” sign?

A

arc1: proximal margin of the proximal bones of the wrist
arc2: distal margin of the proximal carpal row
arc3: proximal capitate and hamate

10
Q

perilunate dislocation

A

occurs when lunate maintains normal position with respect to the distal radius while all other carapl bones are dislocated posteriorly

11
Q

lunate dislocation

A

volar dislocation and forward rotation of the lunate

capitate drops into space vacated by lunate

12
Q

what sign is associated with the lunate dislocation?

A

pie sign

13
Q

rotatory subluxation of the scaphoid

A

most common of the carpal instability patterns (scapho-lunate instability)

14
Q

radiographic signs of a rotatory subluxation of the scaphoid

A

widening of scaphoid lunate articulation with foreshortened appearance (terry thomas sign)
ring sign

15
Q

boxer’s fracture

A

fracture of the neck of the 5th or sometimes 4th metacarpal

16
Q

what does a boxer’s fracture result from?

A

direct blow with the fist

17
Q

radiographic sign of the boxer’s fracture

A

distal fragment of the metacarpal is angled volarly

visible on all views of the hand

18
Q

baseball/mallet finger

A

an avulsion of the extensor tendon at tis insertion of the dorsal surface of the base of the distal phalynx

19
Q

baseball/mallet finger results from?

A

blow to the end of the finger causing hyperflexion to a forcibly extended finger

20
Q

what type of injury is a baseball/mallet finger?

A

hyperflexion

21
Q

intra-articular injuries to the thumb

A

bennett’s

rolando’s

22
Q

extra-articular injuries to the thumb

A

transverse
oblique
epiphyseal separation

23
Q

where does the first metacarpal usually get injured?

A

proximal portion

24
Q

how does one get a fracture of the first metacarpal?

A

fall or direct blow along the longitudinal axis

hyperabduction or hyperextension

25
Q

bennett’s fracture

A

most common injury to metacarpal 1
fracture extends into the joint
displacement is caused by the abductor pollicis longus muscle

26
Q

describe, radiographically, a bennett’s fracture

A

oblique fracture of the base of the first metacarpal associated with dorsal subluxation of the first metacarpal

27
Q

describe, radiographically, gamekeeper’s thumb

A

partial or complete disruption of the ulnar collateral ligament of the 1st MCP articulation

28
Q

what type of injury is gamekeeper’s thumb?

A

valgus

29
Q

gamekeeper’s thumb

A

may have a small avulsion fragment typically at the base of the proximal phalynx
stress views needed

30
Q

dislocations of the hand

A
dorsal, lateral or volar
result from rotatory twisting forces
can be simple or complex
most often single joint involvement
reduciton most commonly closed