What are the criteria for qualified and unqualified blood donation?

In the process of blood donation, many blood donors can't donate blood because of the unqualified physical examination and blood test, but in fact, many "eliminated" blood donors are obviously normal in the hospital physical examination. Are there any diseases in their bodies? If not, why are their blood "unqualified"? Blood quality is the lifeline of blood stations. In order to ensure the quality of blood, according to the requirements of the Ministry of Health, blood stations must carry out physical examination and blood test on blood donors before donating blood. The consultation physical examination items include age (18-55 years old), body weight: male ≥ 50kg, female ≥ 45kg, blood pressure: 90- 140/60-90mmhg, pulse pressure ≥30mmHg, normal body temperature, and no serious diseases in five senses and limbs. There are seven blood tests, including blood type (ABO and RH blood types, positive and negative stereotypes are consistent), hemoglobin (anemia or not), transaminase qualified, hepatitis B virus surface antigen, hepatitis C virus antibody, HIV antibody and syphilis serological test negative. If any of the seven items is unqualified, you can't participate in blood donation. Among all the blood donors who failed the test, the vast majority were not suitable for blood donation because the transaminase was higher than the qualified standard, accounting for about 75% of the eliminated blood donors. However, some blood donors were worried that they had diseases because the test results were unqualified, so they went to the hospital for reexamination, but the results were normal. What's going on here? This is mainly because the blood test standards for screening blood donors formulated by the Ministry of Health for blood collection and supply institutions are stricter than the health standards of hospitals. For example, the sensitivity of blood collection agencies to HBSAg detection reagents is required to be ≤ 1ng/ml (nanograms per ml), while the sensitivity of reagents in most hospitals is ≤2ng/ml. Therefore, the sensitivity of blood collection and supply institutions to the kit is very high. Even if some blood donors are mistakenly eliminated, they should try not to lose a positive blood to the recipient. In particular, most people feel calm when they go to the hospital for physical examination, but they are very nervous when they participate in blood donation testing, especially when they donate blood for the first time. Some people can't even sleep well two days ago, which easily leads to the increase of transaminase. But no matter what causes the blood to be unqualified, it is recommended that blood donors go to the hospital for a thorough physical examination to be foolproof. Then, what will lead to the increase of transaminase, and does high transaminase mean hepatitis? Under normal circumstances, the level of transaminase is normal between 0 and 40. If it is beyond the normal range, there are three main reasons: first, the transaminase is increased by the liver itself, including liver injury caused by hepatotropic virus infection, alcohol, fatty liver, drugs and autoimmune dysfunction; Second, it is caused by non-liver diseases, such as severe heart disease and kidney disease. High transaminase is not necessarily hepatitis, but the high transaminase caused by the above aspects can indicate that the liver has been damaged to varying degrees, and it is necessary to go to a specialized hospital for a comprehensive examination before the diagnosis can be made; Third, because transaminase is very sensitive, for healthy people, such as fatigue, tension, poor sleep, strenuous exercise, eating greasy food and so on. It can also cause a slight increase in transaminase, but it does not mean that there is something wrong with the liver. Finally, especially remind blood donors not to eat high-fat foods, such as fat, eggs, fried dough sticks, peanuts and so on. The day before blood donation and the day before, prevent fatty blood. Because the transfusion of fatty blood can cause allergic reaction, fever, fat embolism and other adverse reactions, fatty blood is also a taboo for clinical blood transfusion and blood products production. In addition, don't drink or take medicine before donating blood. For example, taking aspirin will reduce some functions of platelets within three days. www.naa988.com