A new radiographic method of measuring carpal collapse
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abstract
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We assessed carpal collapse by measuring the capitate-radius (CR)
distance on standard plain radiographs. This new method required
validation of diagnostic accuracy, so we compared it with the method
of Nattrass et al known as revised carpal height (RCH). We studied
wrist radiographs from 16 normal subjects and 11 patients with
unilateral Kienböck's disease. We found that there was a
significant difference in the left/right CR index between the normal
wrists and those with Kienbock's disease (p < 0.001). The use of
left/right RCH index showed no significant difference (p = 0.30).
Diagnostic accuracy was shown to be higher for the CR index using
ROC curves. We then assessed 40 normal wrists and found the mean CR
index to be 0.999 +/- 0.034, and suggest that values less than 0.92
are abnormal. The CR index can be used for diagnosis in unilateral
carpal collapse, and for monitoring progress where the condition is
bilateral.
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citation
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Zdravkovic V, Sennwald G R. A new radiographic method of measuring
carpal collapse. J Bone Joint Surg Br 1997; 79:167-9.
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type
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journal paper/review (English)
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date of publishing
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1-1997
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journal title
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J Bone Joint Surg Br (79/1)
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ISSN print
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0301-620X
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pages
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167-9
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PubMed
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9020467
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