In a patient who has had a unilateral mastectomy with axillary lymph node dissection, which arm should generally be avoided for venipuncture?

In a patient who has had a unilateral mastectomy with axillary lymph node dissection, which arm should generally be avoided for venipuncture?

• A. The arm on the same side as mastectomy; use the other arm.
• B. The arm opposite mastectomy if available
• C. Avoid both arms and use a leg vein
• D. Either arm is acceptable if patient comfort

Answer: (A)

After a unilateral mastectomy with axillary lymph node dissection, the lymphatic drainage in that arm is often disrupted. Venipuncture on the operated side can introduce trauma and impede lymph flow, increasing the risk of lymphedema and related complications. Because of this, the best approach is to use the opposite arm for blood draws whenever possible, to protect the injured lymphatic system and reduce the chance of edema. If the opposite arm isn’t available, other considerations come into play, but choosing the same side as the surgery is avoided as a general rule. Using leg veins is not preferred as a first option due to added difficulty and discomfort, and saying either arm is acceptable ignores the documented risk on the operated side.

After a unilateral mastectomy with axillary lymph node dissection, the lymphatic drainage in that arm is often disrupted. Venipuncture on the operated side can introduce trauma and impede lymph flow, increasing the risk of lymphedema and related complications. Because of this, the best approach is to use the opposite arm for blood draws whenever possible, to protect the injured lymphatic system and reduce the chance of edema. If the opposite arm isn’t available, other considerations come into play, but choosing the same side as the surgery is avoided as a general rule. Using leg veins is not preferred as a first option due to added difficulty and discomfort, and saying either arm is acceptable ignores the documented risk on the operated side.