Hand
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卡片预览 (24 张)
Tell me what are in the 6 dorsal compartments of the wrist?
• Abductor PL, Extensor PB 2.ECRL, ECRB • Extensor PL • EDC, EIP • EDM • ECU
What structure centralizes the extensor mechanism and attaches to the volar plate at the MCP joint?
Sagittal band
What structure helps with PIP extension? What structure helps with DIP extension?
Central slip Lateral bands
Injury to the transverse retinacular ligament may result in what deformity?
Swan neck deformity
Whats in the carpal tunnel?
FDS FDP FPL Mediain Nerve
What innervates the interosseous muscles?
Ulnar nerve
Limited PIP flexion with MCP extension?
Intrinsic tightness
Limited PIP flexion with MCP flexion?
Extrinisic tightness
What does the AIN innervate?
FPL Index and long FDP Pronator quadtraus
Radial nerve proper innervates?
Triceps Anconeus Brachioradialis ECRL
The terminal branch of the PIN lies where?
Floor of the fourth dorsal compartment
For DRF, what is the average radial height, inclination, volar tilt?
Radial Height: 11 mm (accept less than 5 degree change) Inclination: 22 deg (accept less than 5 degree change) Volar tilt: 11 deg (accept less than 10 degree dorsal anglulation)
What is the main blood supply to the scaphoid?
Dorsal branch of the radial artery distal to waist that flows retrograde
DISI indicates what ligament was injured?
SL ligament CID (Carpal instability dissociative)
Carpal instability adaptive results from ?
Malunited distal radius fracture
What are the 4 stages of a perilunate dislocation?
• SL disruption • CL disruption • LT disruption 4, Circumferential disruption, short radiolunate remains attached
What is the acceptable angulation for metacarpal neck fractures of the index and long fingers?
Less than 15-20 degrees
For metacarpal shaft fracture, what is the acceptable shortening?
Less than 5 mm
Every 2 mm of metacarpal shortening leads to how many degrees of extensor lag?
7 degrees
How do I reduce a thumb metacarpal dislocation?
TAPE: traction, abduction, pronation, extension
In Skiers thumb or gamekeepers thumb, what is injured?
The UCL of the MCP
In testing the MCP, what is injured if: There is instability at 30 degrees There is instability at neutral
30 deg is proper UCl and/or dorsal capsular injury Neutral is the accessory UCL and/or volar plate injury (more than 35 degrees of opening overall or 20 degrees more than the contralateral side)
What is a stener lesion?
Adductor pollicis is between the avulsed UCL and its insertion site
More than what percentage of involvement of the base of the proximal phalanx in a PIP joint fracture dislocation leads to persistent dorsal dislocation?
More than 30%