|SSM Cardinal Glennon Children's Medical Center|
A blood transfusion is a relatively simple medical procedure during which a patient receives whole blood or one of its parts through an intravenous line, or IV. This is a tiny tube that is inserted into a vein using a small needle.
While patients are likely to notice a brief pinch of the needle, a blood transfusion is relatively painless. Still, any procedure that involves a needle is likely to cause some anxiety for a child, so it helps to understand how a transfusion is done. That way you can feel confident about what is happening and help put your child at ease.
About Blood Transfusions
Blood is like the body's transportation system. As blood circulates, it delivers oxygen and nutrients throughout the body. It also collects waste products and carries them to the organs responsible for making sure the wastes leave the body.
Whole blood is a mixture of cells and liquid, and each part has a specific job:
A blood transfusion can make up for a loss of blood or any part of the blood. Although whole blood can be transfused, it is rarely used. Instead, more specific parts of blood are transfused as needed. Red blood cells, the most commonly transfused part, are used to increase the blood's ability to carry oxygen and prevent fatigue and other complications.
Transfusions take 1 to 4 hours, depending on how much blood and what type is given, and no special recovery time is needed.
Most transfusions are done in a hospital, but can be done elsewhere when necessary. In most cases, the blood comes from volunteer donors. The blood of the donor, which is carefully screened to ensure its safety, must match the blood of the person receiving it.
Why Blood Transfusions Are Performed
The three main reasons why a child may need a blood transfusion are:
Where the Blood Comes From
Since there's no manmade substitute for blood, the blood supply used for transfusion must be donated. The three types of blood donation are:
Some people worry about getting diseases from infected blood, but the United States has one of the safest blood supplies in the world. Many organizations, including community blood banks and the federal government, work hard to ensure that the blood supply is safe.
The risk of contracting a disease like HIV or hepatitis is extremely low in the United States today because of very stringent blood screening. Also, the needles and other equipment used are sterile and they're used only on one person and then thrown away.
Preparing for a Blood Transfusion
If your child needs a blood transfusion, the doctor will speak with you about the procedure. If you have questions, be sure to ask. When you feel comfortable with the information and your questions have been fully answered, you'll be asked to sign an informed consent form, stating that you understand the procedure and its risks, and give your permission for your child to have the blood transfusion.
If the situation is not a life-threatening emergency, two tests will be performed:
Most transfusions occur in a hospital setting, often at a patient's bedside, or in the operating room, emergency room, or chemotherapy unit. They also can be performed in an outpatient care clinic or even at home, if necessary.
As long as the transfusion is not being done during surgery, you can stay with your child, who will be awake. Your child can sit comfortably in a reclining chair or lie down on a bed, watch a movie, listen to music, or play quietly, and might be able to eat and drink, walk around a bit, and use the bathroom.
Starting an IV Line
A nurse will begin an intravenous line (IV). After the needle is inserted into an arm or hand, a small sample of blood is taken and sent to a lab to confirm the blood type. Once the results are obtained, a tiny plastic tube is left in the vein and attached to the IV tubing, which is then used to connect to the bag containing the blood.
Since puncturing the skin involves a small needle, starting an IV can cause a little bit of pain (kind of like a small pinch). To reduce discomfort, a nurse might put some numbing cream on your child's skin a half hour before inserting the needle.
Though the vein is typically in the arm or hand, it can be done in other places, if necessary, especially if conditions like severe dehydration or blood loss have made the veins harder to find. For example, babies often receive transfusions through veins in their foot or scalp.
Children who need many transfusions may require a central line (a tube inserted into a larger vein in the chest) or a PICC line (a longer tube inserted through a vein near the bend of the elbow). These lines allow easy access and also spare smaller veins the damage that can come from repeated punctures.
Most kids don't require any special medications before or during a blood transfusion. However, if your child has had a mild reaction during a previous transfusion, the doctor might give your child some medication just before the procedure, either by mouth or through the IV.
Just before the transfusion, two nurses will read to each other the names and identification numbers on your child's armband and on the blood that came from the blood bank. The transfusion won't begin unless there is a match.
Transfusing the Blood
The blood bag is hung upside down from an IV pump that controls the speed of the flow.
The nurse will measure your child's blood pressure, body temperature, and pulse several times throughout the procedure. Your child also will be watched closely for any signs of an allergic or other type of reaction, including rash, fever, headache, or swelling.
After a transfusion, if your child is going home, the tiny plastic tube is removed from the vein and a bandage is placed over the area. The site may be slightly sore or tingly for a little while. Medication may be given for any mild side effects, such as fever or headache. If your child is having surgery or is in the hospital, the IV line will stay in place.
In kids with anemia or those undergoing chemotherapy, the greatest benefit of a transfusion is increased blood flow to nourish the organs and improve oxygen levels in the body. This can keep them from feeling extreme fatigue and help give them enough energy for the activities of daily life. Benefits like this often are felt fairly quickly.
For patients with bleeding problems, transfusions with platelets or plasma can help to control or prevent bleeding complications.
Serious reactions to transfusions are rare, but as with any medical procedure, there are a few potential risks, which your doctor will review with you.
When your child is having any kind of procedure, it's understandable to be a little uneasy. But it helps to know that blood transfusions are common procedures and complications are rare. If you have any questions about transfusions, talk with your doctor.
Reviewed by: Kate M. Cronan, MD