Have you ever donated blood?
When it comes to blood donation, you have to mention one person -- Wang Yanping.
Over the past 11 years, he has donated blood 106 times, 73,600 milliliters, which is equivalent to the total amount of blood of 15 adults, and has been called the "king of blood donors". However, fate did not favor such a good man. A bad news came: Wang Yanping died at the age of 48. As soon as the news came out, it hit the microblogging hot search, netizens have left their condolences and expressed their feelings of regret. At the same time, many people questioned the behavior of his blood donation, that his death may be related to regular blood donation.
Some even said that blood donation is so harmful to the body that even doctors are reluctant to donate.
A casual search on the Internet can also see a lot of similar "blood donation harm" statement: blood donation will hurt the vital energy, cause anemia, blood donation will cause blood vessel rupture, become fat, blood donation easy to infected with AIDS, Hepatitis B, often donate blood, prone to leukemia......
However, is this really the case?
Donating blood is harmful to the body, so doctors never donate blood?
Previously, an article titled "Why don't doctors donate blood? After reading it, I was shocked! The article was circulated on the Internet. The article said that blood donation is harmful and doctors and nurses never donate blood.
This has made many people fearful of donating blood, and they have the heart but not the guts. However, the opposite is true. Medical personnel not only donate blood, but also the main force of blood donation. The official state data show that three groups of people, namely college students, civil servants and medical personnel, have the highest rate of blood donation and are the main force of blood donation.
Many medical professionals have also been speaking out to refute the rumor that doctors never donate blood. In fact, the so-called blood donation claim, in fact, are untenable.
Donating blood will hurt your energy and cause anemia?
According to China's regulations, the amount of blood that can be donated is 200-400 milliliters, and the interval between donations is six months. And the total blood volume of a healthy adult is 4000~5000 ml, which is about 8% of body weight. Donating 200~400 ml of blood at one time is only equivalent to 5~10% of the total amount. As you can see, the amount is not large.
And not all the blood in the human body circulates in the cardiovascular system to maintain normal physiological functions, and about 20% of the blood is stored in the liver, spleen and other organs, which is professionally known as the "reserve blood volume". After donating blood, the missing blood volume will be replenished immediately through the reserve blood volume, which will not affect the normal physiological functions.
In addition, the body itself has a strong hematopoietic function, and the donated blood will be regenerated immediately. Therefore, a healthy person who donates blood according to the regulations will not be hurt and will not be anemic.
But if you donate blood too often and in such large quantities that you can't even keep up with your blood reserves, that's a different story. So is Wang Yanping's passing related to excessive blood donation?
In 11 years, 106 times of unpaid blood donation, 73,600 milliliters, which is equivalent to 694ml per donation, about 10 times a year. And according to the regulations, a whole blood donation of 200 to 400 ml, blood donation interval of 6 months. Therefore, many people think that Wang Yanping belongs to excessive blood transfusion.
This is not true. There are two types of blood donation: whole blood donation and component blood donation. Component blood donation is usually referred to as single platelet donation. According to the "Blood Donor Health Examination Requirements", the interval between single platelet donations should be no less than 2 weeks and no more than 24 times/year. One can donate platelets 1~2 therapeutic volume at a time, each therapeutic volume is calculated according to the whole blood 800ml.
This calculation, 106 times during the 11 years of unpaid blood donation, 73,600 ml makes perfect sense. In fact, according to China's Blood Donation Law, even if you want to donate blood excessively, it is not allowed. And blood donation also has requirements for physical fitness, and it's not something you can do just because you want to.
Wang Yanping's death was in fact due to another reason, Wang Yanping accidentally fell on the cervical vertebrae resulting in paraplegia, and since then a few years have been in the fight with the disease, until the unfortunate death due to complications.
Can blood donation cause blood vessel rupture and become fat?
There are claims that donating blood can cause blood vessels to rupture and become irreparable for life. This claim is a bit of nonsense. If that were true, who would dare to go through a blood check program? Who would dare to get a needle and a transfusion?
In fact, this kind of small blood vessel rupture, the normal human body can automatically repair, do not have to worry. As for saying that blood donation will become fat, it is also unscientific. After donating blood, the body makes blood, not fat, so blood donation will not directly cause obesity.
Frequent blood donation, easy to get leukemia?
Some people say that after donating blood, there are fewer platelets, so it will lead to leukemia. This is really reversing the cause and effect. It is true that leukemia patients experience thrombocytopenia, but this is a result of the disease, not the cause of the disease. There is no evidence that leukemia patients have a higher rate of past blood donations than the general population.
For healthy adults, some reduction in platelets after blood donation is not a major problem. Because in the human body, platelets have a lifespan of only about 10 days, the human body would have to constantly "make" platelets. After a healthy adult donates blood, the platelets can return to their pre-donation level within 2-3 days.
Donating blood makes you susceptible to HIV and hepatitis B?
We have already mentioned that there are two types of blood donation: whole blood donation and single platelet donation. Some people are worried that donating platelets will make you susceptible to hepatitis B and HIV. The reason for this is that when you donate platelets, you have to draw out your blood first, and after the platelets have been separated by a blood separator, the remaining blood is then pumped back into the donor's body.
This is an in-and-out process that many people worry is unsafe. This concern is in fact completely unnecessary, whether you are donating whole blood or platelets, it is safe. The needles and bags used in the collection of blood are all new consumables and have been sterilized under high pressure, so there is no chance of them infecting each other with disease.
Platelet donation process, blood is always in the strictly sterilized sealed pipeline sets of material circulation and separation, blood is not in direct contact with the machine, it is impossible to infect germs. In summary, according to the regulations of normal blood donation is not harmful. On the contrary, there will be benefits: it can reduce blood viscosity and prevent cardiovascular and cerebrovascular diseases. After normal blood donation, the blood viscosity will be reduced, which in turn reduces the potential risk of atherosclerosis.
Blood donation is free, so why does it cost money to use it?
In fact, whether it is allogeneic blood or autologous blood, there is no charge for the blood itself. The fee paid when donating blood is actually the cost fee for blood preparation, including testing, preparation and storage. Before donating blood, staff at the blood station are required to conduct an initial checkup, including testing for hemoglobin, transaminases, hepatitis B virus and so on.
After collecting the blood, the blood stations have to do further testing for hepatitis B, hepatitis C, HIV, syphilis and so on, and at least twice. After the blood is tested, it has to be separated into different components, stored in specific containers at low temperatures, and sent to various hospitals through cold chain transportation. In fact, the charge for the use of blood is still far from enough to maintain the operating costs of the blood station, many times also need to rely on the government's financial allocations to support.