Centrul național de transfuzie a sângelui

Who can be a blood donor?

What people who can be blood donors need to know:


Age between 18-60 years;

Minimum body weight 50 kg;

Blood pressure: maximum not exceeding 180 mmHg, minimum 100 mmHg;

Hemoglobin value not lower than 125g/l for women and not less than 135 for men;

No skin diseases, lung sequelae, ulcer surgery, abnormal bleeding tendency, etc;

The time interval between two blood donations cannot be less than 60 days.

 

450±10% millilitres of blood are collected per donation:


 

The medical screening and triage of donors must aim to prevent any risk, both for the donor and for the recipients of this biological product. Therefore, the medical control is based on three examinations (clinical, laboratory and epidemiological), through which contraindications to blood donation can be established. 

These contraindications can be: absolute (due to causes that definitively exclude the individual from donation, such as hepatitis, tuberculosis, syphilis, stomach resection, mitral disease, cancer operated and cured, etc.). ), relative (due to causes that may be variable, such as blood pressure of a certain value, which may subsequently fall, weight under 50 kg, which may subsequently increase, etc.) and temporary (due to certain cyclical phenomena, such as the menstrual period, pregnancy, breastfeeding, as well as a fever caused by a passing respiratory virus, etc.).

Blood donation is allowed only to healthy people between 18 and 60 years of age (as there is no guarantee that the body will respond harmoniously to the loss of 450 ml of blood), to those who do not have blood pressure values above 180 mm Hg or below 100 mm Hg, to women who are not pregnant or breastfeeding, those who do not show exaggerated emotional states, persistent fear of the act of donation or fatigue, have not consumed alcohol or a high-fat meal before coming to the blood collection, have had at least 60 days since their last blood donation, have not had blood loss in the last few days and have not undergone surgery.

The donor's profession can also sometimes be a reason for refusal to be collected, when there is a potential danger of infection (milkers, animal caretakers, sweepers) or physical fatigue (public transport drivers, pilots, heavy machinery operators).

 

The above restrictions on blood donation can be explained as follows:


 

  • Exaggerated emotional states are an expression of damage to the nervous system, which coordinates the distribution of blood as needed, and in this case the response may be inadequate.
  • Fear of the act of donation can lead to a blood circulation disorder, manifested by lipokinesia (fainting).
  • Fatigue (after working the night shift or after heavy exertion) may be a cause of inadequate adaptation of blood circulation. The interval of at least 45 days since the last harvest is considered sufficient to restore all the elements of the blood and the body's reserves lost during the last harvest.
  • The pregnant woman cannot donate blood, as her body must also cover the needs of the future child, and the ban is extended for 18 months after the birth to allow the mother's body to recover its losses.

                  A normal blood supply is 450 ml, a quantity which does not involve any risk for the donor, as the body has a permanent reserve of about 300-400 ml of blood (which it uses when great efforts are made), as well as the ability to quickly replenish the donated blood (in quantity in 1 to 2 hours), without the need for special treatment or nutrition, depending on how the body distributes the various quantities of blood according to needs and how quickly this permanent adaptation is made.