The September CACONS educational meeting was
presented by Susan Mott-Coles, RN, MSN, AOCN. We all know that
chemotherapy works by killing cancer cells; unfortunately it can’t
tell the differenced between a cancer cell and a healthy cell. Among the
healthy cells chemotherapy can destroy are red blood cells. Red blood
cells carry oxygen throughout the entire body, which helps maintain
energy. Chemotherapy patients may find themselves with chemotherapy
induced anemia. Symptoms of anemia include fatigue; trouble breathing or
rapid heartbeat; chest pain; dizziness/lightheadedness; inability to
concentrate; headache; difficulty staying warm; loss of sex drive; and
pale skin. The chronic tiredness caused by anemia may affect quality of
life and also have serious implications to overall health. Anemia can
make certain cancer therapies less effective; can strain your heart as
it overworks to deliver oxygen where it is needed; can make it difficult
to think clearly; can express one’s sex drive; and if left untreated
can result in the need for red blood cell transfusions. The National
Cancer Institute considers normal hemoglobin levels as 12 to 16 g/dL for
women and 14 to 18 g/dL for men.
Treatment for anemia associated with serious disease
tends to focus first on addressing the underlying disease.
There is a new drug on the market, Aranesp. Aranesp
is an erythropoiesis stimulating protein that is produced in Chinese
hamster ovary cells by recombinant DNA technology. It is formulated for
IV or SQ administration. Aranesp is indicated for the treatment of
anemia associated with chronic renal failure, including patients on
dialysis and patients not on dialysis, and for the treatment of anemia
in patients with non-myeloid malignancies where anemia is due to the
effect of concomitantly administered chemotherapy. It is contraindicated
in patients with uncontrolled hypertension.
The most common side effects seen in clinical trials
with Aranesp were fatigue, edema, nausea, vomiting, diarrhea, fever and
shortness of breath.
The recommended starting dose for the correction of
anemia in cancer patients receiving chemotherapy is 2.25mcg/kg
administered as a weekly subcutaneous injection. The dose should be
adjusted for each patient to achieve and maintain a target hemoglobin.
If there is less than a 1.0 g/dL increase in hemoglobin after six weeks
of therapy, the dose should be increased up to 4.5mcg/kg. If hemoglobin
increases by more then 1.0 g/dL in a 2 week period or if it exceeds
12g/dL, the dose should be reduced by 25%. If the hemoglobin exceeds
13g/dL, dosed should be temporarily withheld until the hemoglobin falls
to 12g/dL, then therapy should be reinitiated at a dose 25% below the
previous dose.