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The ABO group and Rh typeThe ABO group and Rh type must be determined for the blood of both the donor and the intended recipient. ABO group is determined by testing the RBCs with anti-A and anti-B reagents and by testing the serum with A1 and B RBCs. Rh type is determined with anti-Rh (anti-D): if the initial test of the donor blood with anti-D is negative, then that blood is tested by a method designed to detect weak D (Du). When either Rh test is positive, the blood sample label reads Rh positive. Conversely, when the tests for both D and Du are negative, the label reads Rh negative. It is not necessary to determine whether a patients RBCs are of the Du type because no harm results from transfusing Rh-negative blood.
How is blood group testing doneBasically, a sample of your blood is mixed with different samples of plasma known to contain different antibodies. For example, if plasma which contains anti-A antibodies makes the red cells in your blood clump together, then you have A antigens on your blood cells. Or, if plasma which contains rhesus antibodies makes the red cells in your blood clump together, then you have rhesus antigens on your blood cells. By doing a series of such tests it is possible to determine what antigens are on your red blood cells.
Other blood typesThere are many other types of antigen which may occur on the surface of red blood cells. However, most are classed as minor and are not as important as ABO and rhesus.
Blood GroupingThe blood group depends on which antigens occur on the surface of the red blood cells. The genetic make-up which you inherit from your parents determines which antigens occur on your red blood cells. Because of this fact a blood group test is sometimes used to help settle disputes about who is the father of a child. The blood group is said to be: A+ (A positive) if you have A and rhesus antigens. A- (A negative) if you have A antigens, but not rhesus antigens. B+ (B positive) if you have B and rhesus antigens. B- (B negative) if you have B antigens, but not rhesus antigens. AB+ (AB positive) if you have A, B and rhesus antigens. AB- (AB negative) if you have A and B antigens, but not rhesus antigens. O+ (O positive) if you have neither A nor B antigens, but you have rhesus antigens. O- (O negative) if you have do not have A, B or rhesus antigens.
 2010-08-28 Caretaking Cat Saves Lives at Animal Clinic - Paw NationThe kitten didnt even have enough blood to type it," Thompson explains, but both cats being fairly common short-haired alley cats, both would most likely have type-A blood. With time running out, Thompson made the call and transfused blood from Christopher to the dying kitten. As you may have guessed, it worked. However, there is a twist: Both cats were actually type B. Perhaps Christophers greatest claim to fame occurred just a few weeks ago. "We had a kitten that was severely anemic and needed a blood transfusion right away. But since it was late at night, I didnt have any blood in my freezer," Dr. Thompson tells Paw Nation. Thats when Christopher stepped in; he jumped up on the table and began bathing the anemic kitten as it struggled to breathe. Christopher the Cat with one of his friends, Facebook Despite his fairly run-of-the-mill orange tabby appearance, Christopher the cat is no ordinary
2010-08-24 Westport Patch, CT - Local Red Cross in "Critical Need" of Blood DonorsThe agency is seeking persons of all blood types, but especially those with O negative. Donors of this type can make the difference between an adequate supply and a shortage, Morrissey explained, because their bloodcan be transfused to patients of all groups and is the most commonly used type in emergency and trauma situations. We usually keep 100 to 110 units of red blood cells per day, including 10 to 12 units of O-negative blood type," Vanessa Hurtado, a medical technologist at the hospital, said. "O-negative is the universal donor type. That is what we give to victims of trauma when they arrive at the hospital before we establish their type. " While area hospitals report adequate supplies, officials echoed the organizations call to give blood.
2010-08-20 Technician - From one arm to another: the journey of donated bloodThe test tubes donated this Friday will be received at the Charlotte Red Cross National Testing Laboratory, one of five laboratories nationwide. The blood samples then undergo a dozen tests to make sure the blood doesn and rsquo;t contain any infectious diseases and to establish the blood type. If the blood tests positive for any infectious diseases, the unit is discarded and the donor is notified. When a blood donor candidate arrives at a blood drive, the donor registers and completes a health history and mini physical. If everything checks out, about one pint of blood will be collected from the donor along with several small test tubes that can be used for further testing. An identical bar code label is placed on the bag, test tubes and the donor record to keep track of the donation, and the donation is stored in ice coolers until it is transported to a Red Cross processing center. Donated blood goes through many treatments before being distributed to hospitals for patient use. Saving lives isn and rsquo;t just a job reserved for firefighters and soldiers. In fact, an ordinary student has the potential to save three lives every two months. How It and rsquo;s as easy as giving blood.
2010-08-18 Blood donor center saves lives one pint at a time - WLOX-TV and The News for South MississippiAlong with finding donors with rare blood types, there are a host of other challenges for blood donor centers. Anyone deployed to malaria-endemic regions in the past five years are deferred for one year. Those testing positive or at risk of exposure to HIV or hepatitis are deferred permanently. Recent donations, tattoos, women with iron deficiencies or who are pregnant are among the reasons for partial deferment. Only 7 percent of the population is O negative. However, the other 93 percent of the population can receive O negative blood, making those with this blood type the universal donor. O negative blood is used in emergency situations when there is no time to test for blood type. WLOX TV 13 - The Station for South Mississippi - Local news, weather, sports, jobs, and entertainment - Gulfport, Biloxi, Pascagoula - The Station for South Mississippi breaking news Gulfport Biloxi DIberville Woolmarket Long Beach Pass Christian Waveland Diamondhead Saucier Kiln Picayune Pascagoula Lucedale Poplarville Ocean
2010-08-14 Ontario cancels vitamin D testing for allFrom fighting high blood pressure to protecting against colorectal cancer and boosting the bodys immune system, vitamin D has become the latest cure-all. But that claim is currently more fiction than fact, said Dr. Les Levin, an oncologist at Princess Margaret Hospital and a member of the Ontario governments medical advisory secretariat - the group responsible for informing the health ministry on latest technologies. Since 2004, vitamin D testing in the province has skyrocketed by 2,500 per cent or from 29,000 to 700,000 in 2009, according to the health ministry. As a result, costs to the province have ballooned from usd. 1. 7 million in 2004 to usd. 66 million a year, said Health Minister Deb Matthews. Vitamin D supplements are the latest health craze to fight cancer but doctors say the evidence is not there. - HealthZone News and Features
2010-08-13 Should Gay Men Be Allowed to Donate Blood Psychology TodayMen (or blood from members of any other high risk groups for HIV). This is because, even though all blood donations are routinely tested for HIV infection, these tests are not a 100 pct. accurate (a person who was infected with the HIV virus within only a few days of the test might not show as being HIV positive in a standard blood test). Given even this slight margin of error, accepting donations from high risk donors (those with a higher base probability of being HIV positive) will of course increase the overall likelihood of declaring HIV infected blood as disease free and using it in blood transfusions. Hence, excluding those with high risk of HIV is the rational - arguably the - Psychology Today
2010-07-23 French Riders Rise Amid Tougher Drug TestingIn 2003, the last time officials from WADA monitored the sample collection and drug-testing at the Tour, riders also were notified on race radio 20 minutes beforehand if they had been chosen to provide a urine or blood sample. and ldquo;Some kind of manipulation could have taken place, and rdquo; the antidoping agency and rsquo;s final report said. Last year and rsquo;s Tour had one positive test - and that result was announced after the Tour ended. Mikel Astarloza of Spain, who won Stage 16 last year, had tested positive for the blood-booster EPO about a week before the Tour began. The French cyclists, who must adhere to strict antidoping laws in their country, have won 6 of the 17 Tour de France stages so far. - Bicycles and Bicycling Doping (Sports) Tour de France (Bicycle Race) Contador Alberto Schleck Andy Fedrigo Pierrick Landis Floyd International Cycling Union World Anti-Doping Agency
2010-07-06 Blood typing in a jiffyWhile knowing the blood group thus makes a certainty out of the value of blood transfusion, there remains the need to test the donor and the recipient for the blood group. The usual method is to take a blood sample and mix it with reagents, one which contains the antibodies for the antigens of group A, and the other which contains the antibodies for the antigens of group B. If the sample clumps, or aggregates, with either, the blood group is identified, as A or B. If it clumps with both, it is O, if with neither, it is AB. In practice, blood is first typed by this comparison with typed reagents. Next, in a process called reverse typing, the sample is mixed with blood of known type. Again, clumping will determine the blood type and confirm the results of the first test and make sure. Innovation Researchers have evolved a method of blood group testing with a strip of special paper, which can be easily and quickly done by a lay person. This method might be useful in case of emergencies such as an accident, where delays in ascertaining blood type could be fatal, writes S Ananthanarayanan - Blood typing in a jiffy S Ananthanarayanan
2010-06-30 Type O blood donors needed - The ReporterNews: Serving North Penn, Indian Valley and neighboring communitiesHowever, if you have Type O blood, you can only receive Type O blood. And those with Type O positive blood cannot give blood to everyone, only to O postive, A positive, B positive and AB positive. They can only receive blood from O postive and O negative persons. O negative can be used during any trauma situation," Tornetta said. "If you dont know your type and we give you a blood transfusion of O negative, it will help you recover for whatever the medical situation is. So, if you are B positive and we give you O negative, theres no complications. " Lansdale Pennsylvania daily newspaper covering local, regional, and national news including local sports, video and multimedia coverage, and classified advertising. - Thereporteronline the reporter lansdale lansdale pennsylvania news lansdale pa news north penn valley pa news all around philly indian valley pa news montgomery county pa news bucks county pa
2010-06-29 Type O blood donors needed - The ReporterNews: Serving North Penn, Indian Valley and neighboring communitiesHowever, if you have Type O blood, you can only receive Type O blood. And those with Type O positive blood cannot give blood to everyone, only to O postive, A positive, B positive and AB positive. They can only receive blood from O postive and O negative persons. O negative can be used during any trauma situation," Tornetta said. "If you dont know your type and we give you a blood transfusion of O negative, it will help you recover for whatever the medical situation is. So, if you are B positive and we give you O negative, theres no complications. " Lansdale Pennsylvania daily newspaper covering local, regional, and national news including local sports, video and multimedia coverage, and classified advertising. - Thereporteronline the reporter lansdale lansdale pennsylvania news lansdale pa news north penn valley pa news all around philly indian valley pa news montgomery county pa news bucks county pa
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