Fig. 2
Abnormal flow confirmation study of central venous ports (CVPs). a A 57-year-old man with colon cancer complained that the specific puncture needle could not be inserted in the port. Fluoroscopy revealed irreversible port reversal (arrow). The CVP was removed. b A 73-year-old woman with gastric cancer complained of prolonged infusion time during chemotherapy. Chest fluoroscopy after the injection of contrast material revealed fibrin sheath formation around the tip of the catheter (arrow). Contrast material was not released from the tip of the catheter because of fibrin sheath formation (arrowhead). The CVP was removed. c A 65-year-old woman with colon cancer complained of prolonged infusion time during chemotherapy. Chest fluoroscopy while the patient was in the supine position revealed a secondary shift of the catheter course, but manual injection of contrast material through the port showed normal flow through the CVP system. d Chest X-ray revealed the course of the catheter was normal in the standing position. Therefore, chemotherapy was continued in a non-supine position