Dr. Kevin Yip

Dr Kevin Yip
Orthopaedic Surgeon
MBBS(UK), FRCS(EDIN), FAM(SING), FHKCOS(ORTHO)

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PASSIVE TESTS OF THE DISTAL RADIOULNAR JOINT

Passive pronation


Positioning.

The subject stands with the arm hanging and the elbow bent to 90°. The examiner stands in front of the subject. Both hands encircle the distal part of the forearm in such a way that the heel of the contralateral hand is placed on the
palmar aspect of the ulna and the fingers of the other hand lie at the dorsal aspect of the radius.

Procedure.

Bring the subject’s forearm into full pronation by a simultaneous action of both hands in opposite directions.

Common mistakes:

• The subject is allowed to abduct the shoulder.
• Too much pressure on the radius or ulna may provoke local tenderness.

Normal functional anatomy:

• Ral1ge: about 85°
• Elld-feel: elastic
• Limitil1g structllres: impaction of the radius against the ulna together with stretching of the interosseous membrane.

Common pathological situations. Pain at full range suggests arthritis or arthrosis of the distal radioulnar joint.

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