If you have this condition, your rib compresses your blood vessels and nerves as they leave your chest and enter your upper extremity. Thoracic outlet syndrome can also cause a UEDVT. Sometimes, a CT scan may be necessary for your doctor to see it. The extra rib may be visible on an X-ray. It’s harmless in most circumstances, but it can irritate a vein or nerves with repeated motion, Becker says. People who have a primary, or spontaneous, UEDVT due to strenuous activity may have an extra rib high in the chest or an abnormal muscle insertion. UEDVT may also occur in people who have a long-term catheter for medication or people who have a catheter above the waist for dialysis. Restricted blood flow is a risk factor for DVT. The presence of a foreign object in your vein can also restrict your blood flow. One possible explanation is that a catheter, which is a thin, flexible tube, can damage blood vessels as your doctor inserts it or as it delivers medication. ![]() Medical procedures such as the insertion of a pacemaker or central venous catheter can lead to UEDVT. TraumaĪ fracture involving the humerus, clavicle, or ribs or any trauma to the surrounding muscles can damage nearby blood vessels. This causes about 20 percent of all UEDVTs. It typically occurs in men, but that ratio may change as more women get involved in athletics, notes Richard Becker, M.D., chief of the division of cardiovascular health and disease and director and physician-in-chief of the Heart, Lung and Vascular Institute at the University of Cincinnati College of Medicine. When they do happen, this type of UEDVT typically shows up in young, otherwise healthy athletes. ![]() In particular, activities such as rowing or pitching a baseball can damage the inside coating of a blood vessel and cause a clot. UEDVT has several possible causes: Strenuous activityĪlthough strenuous activity can bring on a UEDVT, A UEDVT can also occur due to something as ordinary as carrying a heavy backpack.
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