Hand and wrist
Bouman's index no 1
Ulnar translation
Radiography (Posteroanterior)
a : length of radial articular surface
b : distance between styloid process of radius and proximal ulnar corner of the lunate
Bouman's index no 1 = a / b
Borisch N, Lerch K, Grifka J et-al. A comparison of two indices for ulnar translation and carpal height in the rheumatoid wrist. J Hand Surg Br. 2004;29 (2): 144-7.
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