July 29, 2013 11:27:46 PM WATime
Hi Tazzy.
After having a sentinel lymph node biopsy there is a very small risk of developing lymphoedema (swelling of arm due to overload of lymph fluid) estimated at between 1-5% lifetime risk, due to the slightly altered pathway to lymph fluid drainage.
This means the risk is low but not zero, hence advice generally is not to do anything that would increase the risk. Adding any increase in workload to the lymph drainage system of the arm may increase this risk. Having injections, taking blood, intravenous infusions, etc is possibly going to add to the workload in the arm, which is why advice is generally to avoid these things on affected side.
This does become tricky when sentinel lymph node biopsies have been done on both sides. While the risk of developing problems after a blood test from the arm is considered very, very low, many lymphoedema specialists advise it is better to avoid even the slightest risk - therefore encourage people in this situation to have blood taken from the leg veins. Others argue the risk of one or two blood tests from the arm is so low it is not worth worrying about.
Have you been given advice by your lymphoedema physiotherapist? (most breast centres have specialist lymphoedema physiotherapists who advise on exercises and risk of lymphoedema after surgery). If possible to seek their advice, this would be highly recommended. If not available, asking your treating specialist or Breast Care Nurse, or contacting the Cancer Council Lymphoedema Management Service http://www.cancerwa.asn.au/patients/support-and-services/lymphoedema-management/ may be helpful.
Another useful factsheet on lymphoedema is available from the Breast Cancer Network Australia website - see http://www.bcna.org.au/sites/default/files/bcna-fact-sheet-lymphoedema.pdf
Please let us know how you go with this Tazzy ...
Love Glenys xxx
The Click Breast Care Nurse