Abstract
Sixty central venous catheterizations in 53 patients were prospectively studied with respect to phlebographic findings after prolonged parenteral nutrition. Phlebography was performed by a special technique on completion of the intravenous therapy. Under fluoroscopic control, the central venous catheter was slowly removed, while simultaneously contrast medium was continuously injected through it. Two types of thrombosis were demonstrated--sleeve thrombosis, on 25 occasions (42%), and mural veno-occlusive thrombosis, on five occasions (8%). On removal of the catheter the sleeve thrombosis peeled off the catheter and in several cases it was noticed that parts of the sleeve thrombus or the entire sleeve became detached and were carried away with the blood flow. Although the sleeve thrombus seldom gave rise to any symptoms, this type of thrombosis is of great importance in view of the risk of pulmonary embolism, especially in connection with removal of the catheter. With use of the described phlebographic technique thrombi of this type can be visualized.
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