Dr. Kevin Yip

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

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Passive supination

Positioning.

The subject stands with the arm hanging and the elbow bent to a right angle.
The examiner stands in front of the subject. Both hands encircle the distal forearm in such a way that the heel of the ipsilateral hand is placed against the dorsal part of the ulna and the fingers of the other hand against the volar aspect of the
radius.

Procedure.

Bring the subject’s foreann into full supination by a simultaneous movement of both hands in opposite directions.

Common mistakes.

Too much local pressure on the radiusl ulna may provoke tenderness.

Normal functional anatomy:

• Rallge: about 90°
• Ellrl-feel: elastic
• Umitillg structures:

– tension in the interosseous membrane, the oblique cord and the anterior ligament of the distal radioulnar joint
– tension in the extensor carpi ulnaris tendon when the posterior aspect of the ulnar notch of the radius impacts against the stylOid process of the ulna.

Common pathological situations.
The movement is painful when the proximal radioulnar joint is affected.

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