Adson's Sign

What is Adson’s Sign? Significance of Adson’s Sign

Adson’s Sign

Adson’s sign is the loss of the radial pulse in arm by rotating head to the ipsilateral side with extended neck following deep inspiration. It is used as a sign of thoracic outlet syndrome (TOS).

Adson's Sign

Thoracic Outlet Syndrome Nerve Root Affected:

C8 / T1

Structures Causing Constriction in Thoracic Outlet Syndrom

1. Scalenus Anticus Syndrome

2. Cervical Rib Syndrome

3. Costoclavicular Syndrome

4. Carpal Tunnel Syndrome

5. Frozen Shoulder

Adson’s Sign Test Video

Artery Supply of Superior Extremity

Significance of Adson’s Sign

Adson’s sign is no longer used as a positive diagnosis of TOS since many people without TOS will show a positive Adson’s.


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