Mayfield et al reported a classification for carpal dislocations with progressive perilunar instability. Determining the stage can aid in treatment planning.
Parameters:
(1) disrupted joint(s)
(2) radiographic findings
Disrupted Joint(s)
Radiographic Findings
Stage
scapholunate
scaphoid rotation
I
scapholunate + capitolunate
capitate dislocation
II
scapholunate + capitolunate + triquetrolunate
malrotated and dislocated triquetrum; malrotated scaphoid; triquetrolunate diastasis; volar triquetral fracture
III
scapholunate + capitolunate+ triquetrolunate + radiolunate
lunate dislocation
IV
All stages show damage to the following ligaments:
(1) radioscaphoid
(2) scapholunate interosseous
(3) radiocapitate
Other ligaments affected:
(1) radial collateral ligament: in Stages II, III and IV
(2) palmar radiotriquetral and/or ulnotriquetral: in stages III and IV
(3) dorsal radiocarpal: stage IV
To read more or access our algorithms and calculators, please log in or register.
Specialty: Surgery, orthopedic
