Hi Chirley,
My port was inserted in January 2007 and there has not been any problems with transfusions or Desferal infusions. I have a feeling that the blood they take from the port can be diluted (the nurses tell me I am wrong) so they always take blood for testing from my arms.
It can be possible for the port to have impact on the blood circulation to the arm because the catheter in your port can run from the portal into the subclavian vein. It may be better if the catheter runs to a bigger vein like superior Vena cava.
http://www.breastcancer.org/treatmen...view/ports.jsp
Kind regards
Birgitta-A