Diagnosing Thoracic Outlet Syndrome
Thoracic outlet syndrome (TOS) is a condition where the nerves, arteries, and veins in the lower neck and upper chest area, also called the thoracic outlet, is put under pressure or compressed. This pressure can cause pain in the arm, shoulder, and neck.
To diagnose TOS, healthcare providers may use a combination of examinations, screening tests, and procedures. These help confirm a diagnosis and determine the type, severity, or stage of TOS. Here are some of the common methods used:
- Physical examination: During a physical examination, healthcare providers will look for physical signs of TOS, such as pain, swelling, or the presence of masses within the body. They may check the range of motion of the neck and assess for muscle spasm or tenderness in the neck and spine.
- Medical history: Healthcare providers will review a person's medical history to understand their symptoms and any previous injuries or conditions that may contribute to TOS.
- Imaging studies: Imaging studies like CT or MRI scans can provide detailed images of the affected area, helping healthcare providers identify any structural abnormalities or compression on nerves or blood vessels.
- Clinical procedures: Depending on the information gathered from the physical exam and imaging studies, healthcare providers may recommend clinical procedures to help determine a diagnosis. These procedures may include nerve conduction studies or vascular tests like arteriography or venography.
To diagnose TOS accurately and determine its type and cause, it is essential to involve specialists such as neurologists, orthopedic surgeons, vascular surgeons, or physiatrists (doctors specializing in physical medicine and rehabilitation). These specialists have expertise in diagnosing and managing conditions affecting the nerves, blood vessels, and musculoskeletal system.
Additionally, to determine the type, severity, or stage of TOS and identify factors or indicators specific to each individual case, additional examinations or tests may be performed. These may include:
- Scalene muscle block test: In this test, a local anesthetic is injected into the scalene muscles on either side of the neck. If a person experiences symptom improvement after receiving this injection, it suggests neurogenic thoracic outlet syndrome.
- Electromyography (EMG) and Nerve Conduction Velocity (NCV) Test: EMG measures muscle response to nerve stimulation, while NCV assesses how well nerves conduct electrical impulses. These tests help evaluate nerve function and identify any abnormalities.
- Ultrasound: Ultrasound imaging can provide real-time visualization of blood flow in the affected area and help identify any vascular abnormalities.
It's important to remember that these examinations, tests, and procedures should be performed by healthcare professionals who specialize in diagnosing and treating TOS. If you experience symptoms suggestive of TOS or have concerns about your condition, it is crucial to consult with your healthcare provider for an accurate diagnosis and appropriate management plan tailored to your specific needs.