![]() It's safe for most recipients because it does not have any A, B or RhD antigens on the surface of the cells, and is compatible with every other ABO and RhD blood group.įind out more about the Rh system on the NHS Blood and Transplant (NHSBT) website Blood group test It's often used in medical emergencies when the blood type is not immediately known. In most cases, O RhD negative blood (O-) can safely be given to anyone. This means you can be 1 of 8 blood groups:Ībout 85% of the UK population is RhD positive (35% of the population has O+, the most common type). If it's absent, your blood group is RhD negative. If this is present, your blood group is RhD positive. Red blood cells sometimes have another antigen, a protein known as the RhD antigen. This is why group A blood must never be given to someone who has group B blood and vice versa.Īs group O red blood cells do not have any A or B antigens, it can safely be given to any other group.įind out more about the different blood groups on the NHS Blood and Transplant (NHSBT) website The Rh system ![]() Receiving blood from the wrong ABO group can be life-threatening. For example, if someone with group B blood is given group A blood, their anti-A antibodies will attack the group A cells. ![]() Almost half of the UK population (around 48%) has blood group O. blood group AB – has both A and B antigens, but no antibodiesīlood group O is the most common blood group.blood group O – has no antigens, but both anti-A and anti-B antibodies in the plasma.blood group B – has B antigens with anti-A antibodies in the plasma.blood group A – has A antigens on the red blood cells with anti-B antibodies in the plasma.There are 4 main blood groups defined by the ABO system: They recognise foreign substances, such as germs, and alert your immune system, which destroys them.Īntigens are protein molecules found on the surface of red blood cells. They're part of your body's natural defences. Your blood group is identified by antibodies and antigens in the blood.Īntibodies are proteins found in plasma. Antibodies and antigensīlood is made up of red blood cells, white blood cells and platelets in a liquid called plasma. Your blood group is determined by the genes you inherit from your parents.Įach group can be either RhD positive or RhD negative, which means in total there are 8 blood groups. This was only 1.82% of the residential population.Ģ4% were 1st time donors 40% were regular donors and 17% were youth (25 years of age and below) donors.There are 4 main blood groups (types of blood) – A, B, AB and O. HSA keeps 9 days stockpile of blood supply to ensure sufficient blood supply during times of emergency. That is 325 units every day or 118,750 units in the year. In 2023, 14 units of blood are required every hour in Singapore. White blood cells: helps the body fight infections.Red blood cells: helps carry oxygen and carbon dioxide to organs and tissue.Plasma: the liquid portion of blood, containing mostly water, electrolytes, nutrients, and proteins such as antibodies and clotting factors. It is a way to help patients in need and make our society a better place. Through altruistic blood donation, we also celebrate the value of being kind and generous to others. This could put both the donor and the person receiving the blood at risk. If donors were paid or given incentives, they might be tempted to withhold important information. Singapore’s VNRBD policy is in place to make sure that donors are honest about their medical history and any high-risk social activities they may have engaged in. This is aligned with the World Health Organisation and the International Federation of Red Cross and Red Crescent Societies. This is known as voluntary non-remunerated blood donation (VNRBD) and is the foundation of a safe and sustainable blood supply. In Singapore, blood donors donate blood or blood components such as platelets and plasma on their own free will and they do not receive any incentives for doing so. View the Big Blood Picture 2022Ĭlick here for the common misconceptions on blood donation.Ībout Singapore’s voluntary non-remunerated blood donation policy In 2022, we collected 117,967 whole blood and 9,100 apheresis donations. Whole blood donations collect the blood with all its components, while apheresis donations collect specific blood components such as plasma or platelets. The fluid (plasma) portion of your donated blood will be replaced in a few days. About 8% to 12% of your blood volume (depending on your weight) will be taken during blood donation. During a donation, only 350 to 450 ml of blood is drawn. The average adult has 4 to 5 litres of blood.
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