2006-07-28 06:58:41 · 5 answers · asked by baby girl 2 in Science & Mathematics ➔ Medicine
There are many reasons for needing a transfusion of blood. If you have lost blood due to an accident or surgery, then the transfusion is only a replacement for your own blood. If you have anemia and need more blood cells then you mayy get just packed cells. Some people need the clotting factors in blood. Some diseases are treated by the antibodies in another person's blood. It is important to cross match the blood to be sure there is not a reaction between the donor and recipient.
2006-07-28 12:36:31 · answer #1 · answered by science teacher 7 · 4⤊ 1⤋
Blood is collected from a donor. It is usually seperated into seperate components (red blood cells, plasma and platelets). The donor blood is tested for various diseases to make sure it is safe for transfusion. It is also "typed." The major blood types are O pos, A pos, B pos, AB pos, O neg, A neg, B neg and AB neg. At the hospital, the lab determines the patient's blood type. The lab will also screeen the patient for any abnormal antibodies that would require special blood. The lab will select a unit based on the patient's blood type. They then perform a crossmatch. This is where a small amount of the donor blood is mixed with a small amount of the patient's plasma. If no reaction occurs, the blood is considered an acceptable match. The blood is then transfused through an IV into the patient's bloodstream. I used to work in a hospital blood bank and now work for a company that collects and processes donor blood.
2006-07-28 07:28:36 · answer #2 · answered by meltee 3 · 0⤊ 0⤋
Blood is taken from a living donor and the type is determined. The person needing blood is cross-matched with the donor's blood to avoid coagulation. If the blood has been stored for a while, its oxygen carrying ability may be reduced but will recover soon helping the patient to deliver oxygen to tissues that would be under-oxygenated if a plasma without red blood cells was used. Only about 5% of the population donates blood (and many can't because of health restrictions or prior disease) but nearly everyone could need donated blood in the future. Surgeons will not even start some elective surgery if an adequate supply of cross-matched blood is not on hand; even if it is not used during the procedure.
2006-07-28 07:33:19 · answer #3 · answered by Kes 7 · 0⤊ 0⤋
They transfur blood from a dead body who has the same blood type like blood type a or b and transfur it to a body who lost too much blood during surgery
2006-07-28 07:03:11 · answer #4 · answered by mamas_grandmasboy06 6 · 0⤊ 0⤋
Your own stored blood, or someone else's donated blood, is injected into your vein.
2006-07-28 07:02:14 · answer #5 · answered by Strange question... 4 · 0⤊ 0⤋