Distal radius x-ray: Difference between revisions
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Latest revision as of 14:52, 14 October 2019
Checklist
- Is there loss of normal anatomy (e.g. fracture displacement or angulation, loss of radial height)
- Is there involvement of the radiocarpal or distal radioulnar joint?
- Is there discontinuity of the articular surface or diastasis (separation) of the articular fragments?
- Are high-risk features present (severe comminution, articular step-off >2 mm, fracture-dislocation)?
Specific Views
PA
- Radial inclination (angle between line perpendicular to long axis of radius and line between radial styloid and ulnar corner of lunate fossa)
- Normal = 15-25 degrees
- Often smaller with fracture
- Normal = 15-25 degrees
- Radial height (Distance between distal tip of radial styloid and articular surface of the radius)
- Normal ~ 10-17mm
- Often smaller with comminuted or impacted fracture
- Normal ~ 10-17mm
- Ulnar variance (Distance between ulnar-side articular surface of radius and the ulnar carpal surface)
- Normally 1-2mm
Lateral
- Palmar Tilt (angle between line perpendicular to long axis of radial shaft and line through the apices of the palmar and dorsal rims of the radius
- Normally 10o-25o
- Often smaller with fracture
- Normally 10o-25o
Oblique
- May reveal intra-articular involvement not seen on other views