A patient may require a blood transfusion if they have lost a large amount of blood or if they are anemic. Major blood loss can result from a surgery or an injury that causes the patient to lose blood. In these extreme cases, blood transfusions are necessary for the survival of the patient.
Anemia, the most common blood condition, is the result of a lack of healthy red blood cells in the blood. Blood is made up of several different cells and other components. Red blood cells contain hemoglobin, an iron-containing molecule, is responsible for carrying oxygen through the body.
Anemia can result from a lack of red blood cells or a lack of functioning hemoglobin. The result is a lack of oxygen being transported through the body, and the patient experiences anemia symptoms such as fatigue. In the case of anemia, a blood transfusion may not be medically necessary if the cause of the anemia can be successfully treated by other means, such as providing iron supplements or vitamin supplements.
There are risks with a blood transfusion, and with all medical procedures, it is important to weigh the risks and benefits. Some patients may experience fever, which resolves on its own without consequences. There are risks that the blood may contain bacteria or viruses which would infect the transfusion recipient, but these are very rare occurrences.
For more info, see the following helpful websites: nhs.uk/Conditions/Blood-transfusion/Page....
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