Can I donate blood?

The total blood volume of healthy people accounts for about 8% of body weight, and that of adults is about 4000 ~ 5000 ml. Usually, 80% blood circulates in the heart and blood vessels to maintain normal physiological functions; Another 20% of the blood is stored in the liver, spleen and other organs. Once blood loss or strenuous exercise occurs, blood will enter the blood circulation system. A person donating 200 ~ 400 ml of blood at a time only accounts for 5% ~ 10% of the total blood volume, and the blood stored after blood donation will be replenished immediately without reducing the circulating blood volume. Water and inorganic substances lost after blood donation will be replenished within 1 ~ 2 hours; Plasma protein, synthesized by liver, can be supplemented in a day or two; Platelets, white blood cells and red blood cells also quickly recovered to their original levels. The blood of human body is constantly metabolized. Many blood cells are aging and dying all the time, and at the same time, a large number of new cells are generated to maintain the balance of human metabolism. After blood donation, due to the enhancement of hematopoietic function, the lost blood cells were quickly replenished. Therefore, a healthy person who donates blood according to the regulations will not have any influence on his body, let alone "hurt his vitality", but will be beneficial to his body.

Donating blood according to the regulations can promote human metabolism, enhance immunity and disease resistance, stimulate human bone marrow hematopoietic organs, and keep them in the same vigorous hematopoietic state as when they were young, so as to achieve the effect of prolonging life and prevent cardiovascular and cerebrovascular diseases such as arteriosclerosis. It is reported that 332 former blood donors over 66 years old were compared with 399 non-blood donors under the same conditions. As a result, the survival rate of former blood donors was significantly higher than that of non-blood donors, and those who donated more blood lived longer.

Domestic blood donors' physical examination standards are:

(1) Age: 18 ~ 55 years old.

(2) Weight: male > = 50kg, female > = 45kg.

(3) blood pressure12 ~ 20/8 ~12kpa (90 ~140/60 ~ 90mmhg), pulse pressure >: = 4kpa (> = 30mmhg).

(4) Pulse: 60 ~ 100 beats/min, high endurance athletes >; =50 times/minute.

(5) The body temperature is normal.

(6) The skin has no yellow stain, no wound infection, no extensive dermatosis and no obvious swelling of superficial lymph nodes.

(7) There is no serious disease in the five senses, no yellow staining in the sclera and no goiter in the thyroid gland.

(8) There is no serious disability of limbs, no serious dysfunction, and no redness and swelling of joints.

(9) Chest: the heart and lungs are normal (the physiological murmur of the heart can be regarded as normal).

(10) Abdomen: The abdomen is flat and soft, without lump, tenderness and hepatosplenomegaly.

Can't donate blood are:

(1) STD, leprosy and AIDS patients and HIV-infected people.

(2) Patients with hepatitis, those who are positive for hepatitis B surface antigen and those who are positive for hepatitis C antibody.

(3) Patients with allergic diseases and repeated allergies, such as frequent measles, bronchial asthma, and drug allergy (blood donation is not allowed when measles is acute).

(4) Patients with various tuberculosis, such as tuberculosis, renal tuberculosis, lymphoid tuberculosis, bone tuberculosis, etc.

(5) Patients with cardiovascular diseases, such as various heart diseases, hypertension, hypotension, myocarditis, thrombophlebitis, etc.

(6) Patients with respiratory diseases, such as chronic bronchitis, emphysema, bronchiectasis with pulmonary insufficiency.

(7) Patients with digestive system and urinary system diseases, such as severe gastric and duodenal ulcer, chronic gastroenteritis, acute and chronic nephritis, chronic urinary tract infection, nephrotic syndrome, chronic pancreatitis, etc.

(8) Patients with hematological diseases, such as anemia, leukemia, polycythemia vera and various bleeding and coagulation diseases.

(9) Patients with endocrine diseases or metabolic disorders, such as pituitary and adrenal diseases, hyperthyroidism, acromegaly, diabetes insipidus, diabetes, etc.

(10) Patients with organic nervous system diseases or mental diseases, such as encephalitis, sequelae of brain trauma, epilepsy, schizophrenia, hysteria, severe neurasthenia, etc.

(1 1) Patients with parasitic diseases and endemic diseases such as kala-azar, schistosomiasis, filariasis, hookworm disease, cysticercosis, paragonimiasis, Keshan disease and Kaschin-Beck disease.

(12) Patients with malignant and benign tumors that affect their health.

(13) Those who have had important internal organs such as stomach, kidney and spleen removed.

(14) Patients with chronic skin diseases, especially infectious, allergic and inflammatory systemic skin diseases, such as chloasma, eczema and psoriasis.

(15) Patients with ocular diseases such as keratitis, iritis, optic neuritis and high myopia with fundus changes.

(16) autoimmune diseases and collagen diseases, such as systemic lupus erythematosus, dermatitis and scleroderma.

(17) People with a history of drug abuse.

(18) Homosexuals and multiple sexual partners.

(19) Patients with other diseases that the physical examination doctor thinks cannot donate blood.

Blood has always been regarded as the source of vitality and health. Today, when technology can't produce artificial blood, blood for clinical use can only come from healthy people. Blood donation is a noble act based on altruism. Healthy people donate a small amount of blood to save others' lives, which is also a civilized embodiment of love exchange and mutual assistance between people.

What should I pay attention to before and after donating blood? It is necessary to learn the knowledge of blood donation, understand the common sense of blood donation, and eliminate nervousness. Don't be too tired the day before blood donation. Better take a bath. Do not eat greasy food or drink alcohol for two meals before blood donation. Don't overeat at night, but don't eat on an empty stomach. You can eat light food such as steamed bread and vegetables. Get enough sleep. Relax on the day of blood donation. Pay attention to rest after blood donation, keep happy, avoid strenuous activities, and increase nutrition (such as lean meat, eggs, animal liver, etc.). ) and water are beneficial to the recovery of blood, but it is not suitable for overeating. After blood donation, there is a blue phenomenon around the eye of the needle. You can apply hot compress, and it will fade in a few days.

What is voluntary blood donation? That is, healthy citizens of school age voluntarily donate a small amount of renewable blood or blood components to save the lives of critically ill patients, and blood donors don't want any reward. Voluntary blood donation is a form of blood donation advocated by the International Health Organization and the International Red Cross. At present, many countries in the world have realized that clinical blood comes from unpaid blood donation, which has become a symbol to measure the degree of social civilization. Governments all over the world attach great importance to and care about voluntary blood donation. 1985 the best slogan of blood donation in Japan is "blood donation is love, courage and care". This was put forward by a housewife and has been adopted by blood stations all over the world. In Japan, 65438+ 10 month 15 is an adult festival every year. Young men and women who have reached the age of 20 are dressed in costumes. After the adult ceremony, they came to the blood donation car to donate blood for free. This has become a traditional form of promoting blood donation in Japan. The Japanese government stipulates that administrative personnel at all levels and people of school age must donate blood once a year. In America, a popular slogan of blood donation is "Give you a gift, life". In the eyes of Americans, blood donation is a noble act, which is unmatched by any other gift. The Jordanian government has banned the sale of blood. Central blood bank was established in Amman, the capital, 1975. Anyone in urgent need of blood can get it from here, but he must donate blood after he recovers, otherwise his relatives will replace him. This blood bank is called "blood bank of life". After the blood bank was built, the first person to donate blood was King Hussein of Jordan. The slogan of blood donation in Indonesia is "The greatest contribution you can make to your compatriot is to save his life." Former Philippine President Ramos personally participated in blood donation and asked his family to participate in blood donation. 1997 In March, Philippine President Ramos participated in 4 1 voluntary blood donation (250 ml each time) as a commemoration of his 69th birthday. He often said: donating blood makes him 20 years younger. It seems that this sentence is not all a joke. At present, many countries in the world have realized that all medical blood comes from unpaid blood donation. Such as the United States, Japan, Canada, Germany, Australia and other economically developed countries, as well as Algeria, Tanzania, Niger, Nepal, Myanmar and other economically underdeveloped countries, have implemented the system of unpaid blood donation. In many countries, citizens eat a few snacks and have a drink after donating blood, and then go to their jobs without any reward. It is common that people regard blood donation as the obligation of healthy people to society. In Australia and other countries, there are blood donation knowledge classes in primary and secondary schools. The school regularly takes students to visit the blood collection points in the blood center, so that students can understand the whole process of blood donation, and let them understand that blood donation is everyone's social obligation from an early age, and blood donation does not affect their health. When they grow up, they will become a voluntary and glorious blood donor. People regard blood donation as the obligation of healthy people to society, which is a very common thing. Millions of blood donors in dozens of countries around the world have proved that proper blood donation is harmless to health. In China, there is also a propaganda that "blood donation is not harmful to health, just needs a little courage".

Many people's first idea of donating blood is to cure diseases and save lives, which is obligatory. However, a large number of scientific studies have proved that while donating love to the society, blood donors have inadvertently improved their physical condition and invested in their health.

1, blood donation has a good long-term effect on cardiovascular and cerebrovascular systems: it can prevent and relieve blood viscosity and reduce the occurrence of cardiovascular and cerebrovascular diseases. Due to the improvement of living standards and the reduction of physical activity, people accumulate more and more fat in their bodies, which is at a high level for a long time, commonly known as "thick blood". The result of "thick blood" is that fat is attached to the blood vessel wall layer by layer, and finally arteriosclerosis is formed, and the elasticity of blood vessels is reduced, leading to cardiovascular and cerebrovascular diseases. Regular blood donation reduces a part of the sticky blood in the body, and then through normal drinking water, the blood volume is replenished, so that the blood is naturally diluted, and the blood lipid will be reduced. Insisting on proper blood donation can reduce all components in blood, especially iron and protein, and also reduce blood viscosity, thus speeding up blood flow. With the increase of oxygen supply, people feel relaxed and clear-headed. Can effectively reduce arteriosclerosis, thrombosis, cerebrovascular accident and myocardial infarction.

2, regular blood donation can improve hematopoietic function: because from the birth of the fetus, bone marrow has become the main hematopoietic organ. With the increase of age, hematopoietic function and hematopoietic rate gradually decreased. After blood donation, due to the decrease in the number of blood cells, it stimulates the release of mature blood cells stored in bone marrow, stimulates hematopoietic tissue in bone marrow and promotes blood cell production. Regular blood donation within the prescribed time limit can keep the bone marrow vigorous.

3. Male blood donation can reduce the incidence of cancer: too low iron content in the body is prone to iron deficiency anemia, slow action, and too high is counterproductive. International Cancer once reported that if the iron content in the body exceeds 10% of the normal value, the probability of cancer will increase (because red blood cells in the blood contain a lot of iron), and proper blood donation can prevent cancer.

4, can promote and improve mental health: A large number of studies show that healthy emotions can communicate with the brain and other tissues and organs through the nervous system, body fluids and endocrine systems, making them in a good state, which is conducive to the enhancement of human immunity and the improvement of resistance. Blood donation is a noble character to save lives. While helping others and being kind to others, it also purifies one's spirit, soothes one's soul and enriches one's work and life. Doing good by virtue actually helps others and yourself, which is an important element of health and longevity.

5, can prolong life: insisting on proper blood donation can promote human metabolism, but also stimulate human bone marrow hematopoietic organs, so that they always maintain the same vigorous hematopoietic state as youth, and constantly increase the proportion of young red blood cells in the blood. In addition, young cells produced in the body have a strong ability to swallow virus elements, which can play a role in preventing cancer. Improve immunity and disease resistance, prevent diseases and prolong life.