Adson's sign
Adson's sign (pronounced: AD-sonz sign) is a medical term used to describe a specific clinical sign in the diagnosis of thoracic outlet syndrome (TOS).
Etymology
The term is named after American neurologist Alfred Washington Adson, who first described the sign in 1927.
Definition
Adson's sign is a clinical sign that is positive when the radial pulse in the arm is lost or diminished on the affected side when the patient takes a deep breath in and turns their head towards the affected side. This is due to the compression of the subclavian artery caused by the scalene muscles or a cervical rib.
Related Terms
- Thoracic outlet syndrome: A group of disorders that occur when certain blood vessels or nerves in the space between your collarbone and your first rib (thoracic outlet) become compressed.
- Subclavian artery: A major artery of the upper thorax, below the clavicle.
- Scalene muscles: A group of three pairs of muscles in the lateral neck.
- Cervical rib: An extra rib that forms above the first rib, growing from the base of the neck just above the collarbone.
See Also
External links
- Medical encyclopedia article on Adson's sign
- Wikipedia's article - Adson's sign
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