Platelets are multifunctional cells whose primary function is to stop or prevent bleeding. When bleeding occurs, platelets rapidly adhere and aggregate to the bleeding site, preventing further bleeding through a series of reactions. The main indications for platelets are bleeding caused by leukemia, reblocking, malignancy, DIC, infection, idiopathic thrombocytopenic purpura, multiple myeloma, uremia, radiotherapy or chemotherapy, trauma and surgical patients. Platelet donation is not harmful to the health of healthy people in moderation. Based on the metabolic physiology of blood cells, even without donation, about 10-20% of platelets in the human body die every day in the blood, while new platelets are produced continuously, and the platelets in the human body are in a continuous metabolic process. The life span of platelets is generally 7-11 days, and platelets recover faster than red blood cells. After a healthy person donates platelets, the platelets in the blood circulation will return to their original level 3 days after collection through the body’s self-regulation.
Conditions for platelet donation: In addition to meeting the general examination requirements for blood donors, platelet donors should also meet the following.
1, hemoglobin (Hb) measurement; male ≥ 120 g / L; female ≥ 115 g / L, such as the use of copper sulfate method: male ≥ 1.0520, female ≥ 1.0510
2, erythrocyte specific volume (HCT) ≥ 0.36, the
3, the predicted platelet count (PLT) after collection: ≥ 100 × 109 / L.
4.The platelet count (PLT) of the donor before collection is ≥150×109/L and <450×109/L.
The following points should be noted for platelet donation.
1. Donors who have taken oral anti-platelet aggregation or drugs that inhibit platelet metabolism (such as aspirin, vitamin E, anti-inflammatory pain, pansentin, aminophylline, chloramphenicol and anti-allergy drugs) before donating blood for less than 5 days after stopping the drug cannot donate platelets and platelet preparation components of whole blood. These drugs can interfere with the hemostatic function of platelets, and the hemostatic function of platelets can hardly be completed normally after transfusion.
2.Good venous filling of the upper limbs before collection.
3.Ensure sufficient sleep and emotional stability the day before platelet donation, avoid mental tension during blood donation, relax your whole body, and watch TV programs to distract from the tension of blood donation.
4. Try not to drink alcohol the day before donating blood. Excessive drinking, staying up late, fatigue, drugs, etc. may cause high transaminases (ALT) and lead to blood waste.
5. Eat a light diet the day before donation. Do not eat high-fat and high-protein foods, such as meat, eggs, dairy products, soy products, peanuts, melon seeds, etc., to avoid producing fatty blood. Too high blood lipids interfere with the monitoring of the interface detector, the normal interface is difficult to form, affecting the separation and collection of platelets. But also can not fasting, fasting prone to hypoglycemia.
6.When the cuff is inflated indicates that you are donating blood, make a fist movement; when the cuff is loosened, do not make a fist movement and wait to return the transfusion.
7.After platelet donation, use three fingers to apply static pressure to the eye of the needle for 3-5 minutes and rest for 10-15 minutes. Keep the dressing on the puncture site for at least 4 hours.
8.After donation, take more water, eat easily digestible food and fruits, avoid drinking alcohol and ensure sufficient sleep.
9. Age: 18-55 years old, weight: 50 kg for men and 45 kg for women
What are the conditions that prevent people from donating blood for the time being?
1. Those who have had teeth extraction or other minor surgery within half a month.
2.Women who are three days before or after menstruation, during pregnancy, less than six months after miscarriage, and less than one year after delivery or breastfeeding.
3.People who have recovered from cold or acute gastroenteritis for less than one week, those who have recovered from acute urinary tract infection for less than one month, and those who have recovered from pneumonia for less than three months.
4.Some infectious diseases such as dysentery for less than six months, typhoid fever for less than one year, brucellosis for less than two years, malaria for less than three years.
5.Transfusion of whole blood and blood components within the last five years.
6.Less than six months after a major surgery, appendectomy, hernia repair, tonsil surgery less than three months.
7. Those who have not completed one week after the healing of limited inflammation of the skin, and those who have not completed two weeks after the healing of extensive inflammation.
What are the conditions that prevent people from donating blood?
1.Patients with venereal disease, leprosy, AIDS and HIV infection.
2. Patients with hepatitis disease, hepatitis B surface antigen positive, hepatitis C antibody positive.
3, patients with allergic diseases and recurrent allergies, such as frequent measles, bronchial asthma, drug allergies (simple measles is not allowed to donate blood during acute attacks).
4. Patients with various tuberculosis diseases, such as pulmonary tuberculosis, renal tuberculosis, lymphatic tuberculosis and bone tuberculosis, etc.
5.Patients with cardiovascular diseases, such as various heart diseases, hypertension, hypotension, myocarditis and thrombophlebitis, etc.
6, patients with respiratory system diseases, such as chronic bronchitis, emphysema and bronchial dilatation pulmonary insufficiency.
7, patients with digestive and urinary system diseases, such as severe gastric and duodenal ulcers, chronic gastroenteritis, acute and chronic nephritis and chronic urinary tract infections, nephrotic syndrome, chronic pancreatitis.
8, patients with hematological diseases, such as anemia, leukemia, true erythrocytosis and various bleeding and coagulation diseases.
9, patients with endocrine diseases or metabolic disorders, such as pituitary and adrenal diseases, hyperthyroidism, acromegaly, uremia and diabetes mellitus.
10, patients with organic neurological diseases or psychiatric disorders, such as encephalitis, sequelae of traumatic brain injury, epilepsy, schizophrenia, hysteria, severe neurasthenia, etc.
11.Patients with parasitic and endemic diseases, such as black fever, schistosomiasis, filariasis, hookworm, cysticercosis and pulmonary schistosomiasis, kwashiorkor disease and big bones disease, etc.
12.Patients with various malignant tumors and benign tumors affecting health.
13.Patients who have undergone surgery to remove important internal organs such as stomach, kidney and spleen.
14.Patients with chronic skin diseases, especially infectious, allergic and inflammatory systemic skin diseases, such as ringworm, widespread eczema and systemic psoriasis, etc.
15.Patients with ophthalmic diseases, such as keratitis, iritis, optic neuritis and high myopia with changes in the fundus of the eye.
16, autoimmune diseases and collagen diseases, such as systemic lupus erythematosus, dermatitis, scleroderma, etc.
17.People with a history of drug addiction.
18, Homosexuals, multiple sexual partners.
19.Patients with other diseases that the examining physician believes cannot donate blood.