Understanding Blood Transfusions During Blood Cancer Treatment: What to Expect

If you or a loved one is undergoing treatment for blood cancer, there is a good chance that blood transfusions will become part of the journey. For many blood cancer patients, transfusions are a routine and essential form of supportive care that helps the body keep up with the demands of treatment. While the idea of receiving someone else's blood can feel unfamiliar or even intimidating at first, understanding what to expect can help ease your mind and prepare you for the experience.

Why Blood Cancer Patients May Need Transfusions

Blood cancers like leukemia, lymphoma, and myeloma directly affect the bone marrow — the spongy tissue inside your bones where blood cells are produced. The cancer itself, along with treatments such as chemotherapy, radiation, and stem cell transplants, can significantly reduce the bone marrow's ability to make enough healthy blood cells. When your body cannot produce enough red blood cells, platelets, or other blood components on its own, a transfusion provides the boost your body needs to continue treatment safely.

According to the Leukemia & Lymphoma Society, almost all patients with leukemia require some transfusions during their care. Your oncologist monitors your blood counts closely through regular CBC tests and will recommend transfusions based on your individual levels and symptoms. If you are not yet familiar with how blood counts work, our guide to <a href="/blog/understanding-blood-counts-during-cancer-treatment">understanding your blood counts</a> walks through the basics.

Types of Blood Transfusions for Cancer Patients

Not all blood transfusions are the same. Depending on what your body needs, your care team may recommend one or more of the following:

• Red blood cell transfusions — the most common type for cancer patients. Red blood cells carry oxygen throughout your body. When your hemoglobin drops too low, a condition called anemia, you may feel extremely fatigued, short of breath, or dizzy. A red blood cell transfusion helps restore your oxygen-carrying capacity and can significantly improve how you feel.
• Platelet transfusions — platelets help your blood clot. When treatment causes your platelet count to fall dangerously low, a condition called thrombocytopenia, your risk of bleeding increases. Platelet transfusions help prevent or control bleeding episodes.
• Plasma transfusions — less common for blood cancer patients, plasma transfusions may be needed when clotting factors are depleted. Plasma is the liquid portion of blood that contains proteins essential for clotting and immune function.

What to Expect During a Blood Transfusion

Before the Transfusion

Before your first transfusion, your care team will draw blood for a "type and screen" test to determine your blood type and check for antibodies that could cause a reaction. This process typically takes about an hour. A compatible donor unit is then identified through a crossmatch process. You may also have your vital signs checked — temperature, blood pressure, heart rate, and oxygen level — as a baseline before the transfusion begins.

During the Transfusion

A transfusion is given through an intravenous (IV) line, usually in your arm or through an existing central line or port. The process typically takes between one and four hours, depending on the type and amount of blood product being given. For the first 15 minutes, the blood is given slowly while staff closely monitor you for any signs of a reaction. If everything goes smoothly, the rate is gradually increased for the remainder of the transfusion.

You will be seated in a chair or reclining in a bed during the process — many patients read, watch shows on a tablet, or simply rest. Your care team will check your vital signs periodically throughout the transfusion and again after it is complete.

After the Transfusion

Once the transfusion is finished, the IV is removed and your vital signs are checked one final time. Some people feel better almost immediately, especially if they were experiencing significant anemia symptoms like fatigue or shortness of breath. Others may notice improvement gradually over the next day or two. Your care team may order follow-up blood work to confirm that your counts have improved.

Possible Side Effects of Blood Transfusions

Most blood transfusions go smoothly, but reactions can occur. Being aware of what to watch for helps you communicate effectively with your care team:

• Mild allergic reactions — itching, hives, or a rash. These are usually managed quickly with antihistamines.
• Febrile reactions — fever, chills, headache, or nausea during or up to 24 hours after the transfusion. This is caused by the immune system reacting to components in the donor blood and is one of the most common transfusion reactions.
• Iron overload — patients receiving many red blood cell transfusions over time may accumulate excess iron, which can affect the heart and liver. Your care team may prescribe iron chelation therapy if this becomes a concern.

Tips for Making Transfusion Days Easier

Transfusion appointments can be long, but a little preparation goes a long way. Here are some practical tips from patients who have been through it:

• Bring layers of clothing — infusion areas can be cool, and chills may occur during transfusions
• Pack snacks, water, and entertainment such as books, headphones, or a tablet
• Wear comfortable clothing with easy arm access for the IV line
• Ask about scheduling — some clinics allow you to request specific appointment times
• Arrange a ride home, as you may feel tired after a transfusion
• If you have a port or central line, ask your care team whether it will be used for the transfusion

You Are Not Alone in This

Blood transfusions can feel like one more thing to manage during an already overwhelming time. But they are also a powerful reminder that your treatment plan is working to support your body through every stage of care — and that donors and medical teams are part of your extended support network.

At the Live Like Brent Foundation, we understand that the practical challenges of treatment — getting to appointments, keeping up with household expenses, and maintaining stability at home — can be just as taxing as the medical challenges. Our <a href="/how-we-help/comfort-funds">Comfort Fund program</a> helps blood cancer patients and their families overcome non-medical barriers to treatment, with approved expenses paid on behalf of patients to verified vendors for needs like transportation, utilities, food support, and housing stability.

Disclaimer: This article is intended for educational purposes only and does not constitute medical advice. Blood transfusion needs, procedures, and side effects vary based on individual health conditions, treatment protocols, and other factors. Always consult your oncologist or hematologist for guidance specific to your care plan.