Difference between revisions of "X-ray of scapholunate instability"
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| − | Scapholunate ligament instability is indicated when the ''scapholunate distance'' is more than '''3 mm''', which is called ''scapholunate dissociation''.<ref>{{cite web|url=https://radiopaedia.org/articles/scapholunate-interval|title=Scapholunate advanced collapse|author=Owen Kang and Henry Knipe et al.|website=[[Radiopaedia]]|accessdate=2018-01-05}}</ref> A ''static'' instability is generally readily visible, but a ''dynamic'' scapholunate instability can only be seen radiographically in certain wrist positions or under certain loading conditions, such as when clenching the wrist, or loading the wrist in ulnar deviation.<ref name="FairplayCozzolino2013"/> | + | Scapholunate ligament instability is indicated when the ''scapholunate distance'' is more than '''3 mm''', which is called ''scapholunate dissociation''.<ref>{{cite web|url=https://radiopaedia.org/articles/scapholunate-interval|title=Scapholunate advanced collapse|author=Owen Kang and Henry Knipe et al.|website=[[Radiopaedia]]|accessdate=2018-01-05}}</ref> A ''static'' instability is generally readily visible, but a ''dynamic'' scapholunate instability can only be seen radiographically in certain wrist positions or under certain loading conditions, such as when clenching the wrist, or loading the wrist in ulnar deviation.<ref name="FairplayCozzolino2013">{{cite journal|last1=Fairplay|first1=Tracy|last2=Cozzolino|first2=Roberto|last3=Atzei|first3=Andrea|last4=Luchetti|first4=Riccardo|title=Current Role of Open Reconstruction of the Scapholunate Ligament|journal=Journal of Wrist Surgery|volume=02|issue=02|year=2013|pages=116–125|issn=2163-3916|doi=10.1055/s-0033-1343092}}</ref> |
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Revision as of 13:41, 30 May 2018
Author:
Mikael Häggström [notes 1]
Planning
In order to diagnose a SLAC wrist you need a posterior anterior (PA) view X-ray, a lateral view X-ray and a fist view X-ray.[1]
Diagnosis
Scapholunate ligament instability is indicated when the scapholunate distance is more than 3 mm, which is called scapholunate dissociation.[2] A static instability is generally readily visible, but a dynamic scapholunate instability can only be seen radiographically in certain wrist positions or under certain loading conditions, such as when clenching the wrist, or loading the wrist in ulnar deviation.[3]
Static scapholunate dissociation
Dynamic instability: Increased scapholunate distance (between yellow lines) upon ulnar deviation of the wrist, but not otherwise.
Dynamic scapholunate instability visible upon clenching the wrist
Scapholunate ligament disruption associated with a colles fracture
References
- ↑ Novelline, RA (2004). Squire's fundamentals of radiology, 6th Edition (6th ed.). United States of America: President and fellows of Harvard college. ISBN 0-674-01279-8.
- ↑ Owen Kang and Henry Knipe et al.. Scapholunate advanced collapse. Radiopaedia. Retrieved on 2018-01-05.
- ↑ Fairplay, Tracy; Cozzolino, Roberto; Atzei, Andrea; Luchetti, Riccardo (2013). "Current Role of Open Reconstruction of the Scapholunate Ligament ". Journal of Wrist Surgery 02 (02): 116–125. doi:. ISSN 2163-3916.
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