Who Can Ab Positive Donate To
Group AB can donate to other AB’s but can receive from all others. Group B can donate red blood cells to B’s and AB’s. AB’s. Group O can donate red blood cells to anybody.
Blood types are one of the most common ways people categorize themselves, as well as a way that hospitals identify patients before transfusions. Blood type is determined by your ABO blood group, which determines what kind of antibodies you have in your body. The different blood groups produce proteins called antigens on the surface of their red blood cells, so white blood cells know how to attack them.
A person with Type A blood has an antigen that tells his or her immune system to attack foreign bodies like bacteria and viruses. People with Type B blood have another antigen that tells their immune systems to fight off infections caused by eukaryotes (organisms made up of protists and animals). And those with Type AB blood have antigens for both kinds of infection.
Your blood type also affects whether you’re able to donate or be donated. For example, there are only two major blood centers in the United States – American Red Cross and National Marrow Donor Program. Both organizations accept donations from people who have Type O blood. If you want to give blood, check if your local hospital accepts Type O donors first.
In this article, we’ll look at the differences between three main blood groups: A, B and O. Find out why they vary so much, and learn about some of the more uncommon blood types.
ABO Blood Groups Chart
What makes it possible to study the difference between these three main blood types? It’s because each individual blood cell contains information about its donor’s blood type. In order to figure out someone’s blood type, scientists must extract blood cells from a sample of whole blood. They then count the number of blood cells that carry specific antigens in order to determine where that donor falls into a particular blood grouping.
There are four basic blood groups: A, B, AB and O. Each group can be further divided into subgroups. So far, researchers have identified over 50 variations in blood types that differ from the standard ABBO classification scheme [Source: WebMD]. However, doctors don’t need to worry too much about the differences among these minor blood types. Since the vast majority of blood transfusions occur within the same groupings, knowing exactly where someone fits into any given group isn’t important enough to warrant testing or even mention in everyday conversation.
The reason for this is simple: Most people don’t ever run across someone outside their own blood group. Even though rarer blood types exist, they usually only account for a few thousand cases per year. These blood types often result from a genetic mutation passed down through generations, and they tend to appear sporadically rather than as part of a larger pattern.
For the most part, doctors deal with common blood types when treating diseases and disorders. That means they rarely need to perform transfusions or make decisions based on unusual blood types. But occasionally, they may encounter situations where they do.
We’ve already mentioned that many blood banks use Type O blood as the universal donor type. This is because it doesn’t take long for blood to become unusable once it starts clotting. When this happens, oxygen can no longer get to the heart and brain, causing death.
To prevent this from happening, the blood supply is regularly tested for potential donors. Those who test positive for certain infectious diseases such as hepatitis and HIV are immediately removed from the pool. Also, anyone donating less than 500 milliliters (16 ounces) of plasma every 56 days can’t donate at all. Plasma donation takes place under strictly controlled conditions in special facilities.
Plasma consists mainly of water and proteins and accounts for around 60 percent of human blood. Within the blood itself, platelets account for roughly 15 percent while the remaining 25 percent consists of various fluids including hemoglobin, albumin and globulins. Platelets help blood clot by sticking together to form a plug. Without them, our blood would not clot properly and could potentially cause internal bleeding.
Hematocrit levels are used to measure how healthy someone’s blood actually is. Hematocrit measures the percentage of total volume occupied by red blood cells. As such, it indicates how well circulation works throughout the entire body. The lower the hematocrit level, the greater the chance that a patient will experience problems.
Next time you visit the doctor, ask him or her about taking a blood typing class. Learning about the basics of blood groups can help you understand the medical terminology behind them. You can also find out more about the history of blood types and how they developed.
Learn more about blood types in “Donating Your Blood,” by Michael E. Fletcher. We pick related titles based on books we think you’ll like. Should you choose to buy one, we’ll receive a portion of the sale.
Although Type O blood is considered universal, it does have some disadvantages. Because it lacks the ability to trigger an allergic reaction, Type O blood recipients sometimes require higher doses of medication during surgery. Additionally, since Type O blood can’t cause tissue damage, it’s often used as emergency blood during times of disaster. This is particularly true in countries where Type A blood is scarce.
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