(1,3) Wrist & Hand Injuries Flashcards

1
Q

What is the most common wrist fracture in geriatric patients?

A

Colles Fx

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2
Q

What population is primarily affected by Colles fractures?

A
  • F > M
  • elderly, osteoporosis
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3
Q

What is a Colles fracture?

A

fracture of distal radius with dorsal angulation of distal fragment (radial plateau)

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4
Q

What is the term for the appearance of a Colles fracture?

A

dinner fork deformity
(dorsal angulation of distal fragment)

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5
Q

What is the name for a reverse Colles fracture?

A

smith Fx

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6
Q

What is the mechanism of a Smith fracture?

A

FOOSH with flexed hand

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7
Q

What is a Smith fracture?

A

fracture of distal radius with anterior angulation of distal fragment (radial plateau)

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8
Q

What is a Barton fracture?

A

Fx of posterior rim of distal radius

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9
Q

What is another name for a Barton fracture?

A

rim Fx

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10
Q

What are the 3 names for a fracture of the radial styloid process?

A
  • chauffeur Fx
  • backfire Fx
  • Hutchinson Fx
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11
Q

What is the most common carpal bone to fracture in adults?

A

scaphoid

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12
Q

What is the most common occult fracture in the human body?

A

scaphoid Fx

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13
Q

What is the mechanism of a scaphoid fracture?

A

FOOSH

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14
Q

What part of the scaphoid is most likely to fracture?

A

neck/waist

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15
Q

What is the best radiographic view for a scaphoid fracture?

A

PA wrist w/ ulnar deviation

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16
Q

What are the possible complications of a scaphoid fracture?

A
  • AVN
  • non-union
  • carpal instability (pseudoarthrosis)
  • degeneration
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17
Q

What is the term for an avulsion of the dorsal surface of the triquetrum?

A

fischer Fx

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18
Q

What is the 2nd most common carpal to fracture?

A

triquetrum

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19
Q

What is the mechanism of a Fischer fracture?

A

FOOSH + hyperflexion

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20
Q

What is the best view for a Fischer fracture?

A

lateral

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21
Q

What is the radiographic sign for a Fischer fracture?

A

pooping duck sign

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22
Q

What are the possible mechanisms of a hook of hamate fracture?

A
  • golfing or racquet sports
  • stress Fx
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23
Q

What is the best radiographic view for a hook of hamate fracture?

A

carpal tunnel view

24
Q

What is the most common carpal dislocation?

25
Q

What is the mechanism of a lunate dislocation?

A

FOOSH + hyperextension

26
Q

What was does the lunate displace when dislocated?

A

anteriorly (into carpal tunnel)

27
Q

What is the radiographic sign for a lunate dislocation?

28
Q

What is the best radiographic view for a lunate dislocation?

29
Q

What nerve is implicated in a lunate dislocation?

30
Q

What is the term for dorsal displacement of all carpals except the lunate, which stays in contact with the radius?

A

Perilunate dislocation

31
Q

What is another name for scapholunate dissociation?

A

rotary subluxation of the scaphoid

32
Q

What structure is damaged with scapholunate dissociation?

A

scapholunate lig

33
Q

What are the radiographic findings of scapholunate dissociation?

A
  • Terry Thomas sign
  • Signet ring sign
  • DISI deformity
34
Q

What is the stability of scapholunate dissociation?

35
Q

What is the normal scapholunate angle?

36
Q

What is Dorsal Intercalated Segmental Instability (DISI)?

A

dorsal angulation of lunate
(scapholunate angle >60 deg)

37
Q

What is Volar Intercalated Segmental Instability (VISI)?

A

volar angulation of lunate
(scapholunate angle <30 deg)

38
Q

What injury is DISI associated with?

A

scapholunate ligament (dissociation)

39
Q

What injury is VISI associated with?

A

lunotriquetral ligament

40
Q

What is the most common metacarpal fracture?

A

neck of 5th metacarpal

41
Q

What is the term for a fracture of the distal 2nd/3rd metacarpal?

42
Q

What is the term for a fracture of the distal 4th/5th metacarpal?

A

bar room Fx

43
Q

What is Game Keeper thumb?

A

disruption of ulnar collateral ligament which may result in avulsion Fx at MCP jt of 1st digit

44
Q

What is another name for Gamekeeper thumb?

A

skier thumb

45
Q

What is the mechanism of Game keeper thumb?

A

hyperABduction of thumb

46
Q

What is a complication of Game keeper thumb?

A

Stener lesion (UCL becomes trapped btwn adductor pollicis and base of prox phalanx)

47
Q

What is the term for avulsion or impaction at the PIP in hyperextension?

A

volar plate Fx

48
Q

What is the term for an avulsion fracture of the dorsal corner of the base of the distal phalanx by extensor digitorum?

49
Q

What is the mechanism of a mallet fracture?

A

forceful flexion of DIP

50
Q

What injury results in loss of DIP extension?

51
Q

What is the term for avulsion of the flexor digitorum profundus?

A

jersey finger

52
Q

What is the mechanism of jersey finger?

A

forceful hyperextension of DIP

53
Q

What injury results in loss of DIP flexion?

A

jersey finger

54
Q

What is the most common direction of metacarpophalangeal and interphalangeal joint dislocations?

55
Q

What are the most common dislocated joints in the body?

A
  • metacarpophalangeal
  • interphalangeal