![]() Depending on the nerve branch that is compressed, it can also lead to tingling in the fourth or fifth fingers and clumsiness with hand movements. It can cause achiness in the neck, arm, or hand. Neurogenic thoracic outlet: The most common and treatable form, this occurs when weak or tight muscles cause the brachial plexus (a nerve bundle that controls arm muscles and sensation) to become pinched or inflamed. The clinical evaluation of a patient with suspected neurogenic thoracic outlet syndrome is composed of an accurate and detailed medical history and a specialized physical examination. ![]() What is arterial thoracic outlet syndrome Arterial thoracic outlet syndrome (ATOS) is a disorder that affects the artery between your ribs and collarbone (clavicle). It can impair the circulation in your arm and hand. Prevention Outlook / Prognosis Living With Overview Arterial thoracic outlet syndrome compresses the subclavian artery, blocking blood flow and allowing blood clots to form. It can cause numbness, coldness, pain, or sores in the hands or fingers. Diagnosis can be suspected clinically with specific provocative tests and supplemented with radiographs or vascular studies. ![]() It is the least frequently seen form, but also the most serious. Thoracic outlet syndrome is a neurovascular disorder resulting from compression of the brachial plexus and/or subclavian vessels in the interval between the neck and axilla. Arterial thoracic outlet: This occurs when a boney abnormality in the thoracic outlet area compresses the arteries that travel through it and limits their blood flow. Doctor Examination Diagnosis of this condition can be more complicated than diagnosis of other more common shoulder conditions because there may be many symptoms to explain.As part of your physical exam, your provider may ask you to do movement-based tests, including: Upper limb tension test. The venous version can lead to swelling in the arms or hands, chest wall vein dilation, and a heavy sensation in the arm or hand muscles. Diagnosis and Tests How is thoracic outlet syndrome diagnosed Healthcare providers diagnose TOS by performing a physical exam and reviewing your medical history. Venous thoracic outlet: More acute in onset, this variety typically occurs when new or tiring arm movements cause damage to the veins in the lower neck or upper chest.
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