Abstract
Purpose: Thromboses occur in connection with the use of venous port systems. Valid data on the instillation of heparin-based solutions in the lumen of the port system are lacking. Methods: One hundred and seventy-three patients with malignancy from 19 centres who had participated in an observation study of subcutaneous thromboprophylaxis with dalteparin-Na (Fragmin P/-Forte) were analysed with a view to flushing the port systems and investigating any related influence on the occurrence of catheter-associated thromboses. Results: All catheter-associated thromboses were seen in centres which used either no UFH, or UFH concentrations of up to 250 IU/ml (8/108; 7.4%). The rate of thrombosis rose to 10% (6/60) if no high-risk dose of dalteparin was applied subcutaneously. On the other hand, the rate of catheter-associated thromboses under the high-risk dose of dalteparin and/or a more highly concentrated instillation fluid, at 0.9% (1/113), was much lower. One haemorrhage from gastric ulcer occurred under the highest UFH concentration in the instillation fluid (2,500 IU UFH/ml). Conclusion: The results indicate that a concentration between 500 IU UFH/ml and 1,000 IU UFH/ml in the instillation solution, at the same time as high-risk prophylaxis with subcutaneous dalteparin for prevention of catheter-associated thromboses, is effective in patients with manifest tumour disease. The instillation of LMWH-based solutions at a concentration of approx 500 anti-Xa units/ml should be discussed as a pending issue.
Original language | English |
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Pages (from-to) | 235-241 |
Number of pages | 7 |
Journal | Journal of Cancer Research and Clinical Oncology |
Volume | 130 |
Issue number | 4 |
DOIs | |
State | Published - Apr 2004 |
Keywords
- Dalteparin
- Heparin
- Port catheter
- Port flushing
- Thromboprophylaxis