How Many Milliliters of Blood Should Be Donated for the First Time?

Update Date: 2024-05-27 Source: Network

Blood donation is a very meaningful activity that can save many patients. Therefore, our country now strongly encourages unpaid blood donation. However, not everyone is suitable for blood donation. The age range for blood donation is between 18 and 55 years old, and there are also certain requirements for body weight. Only those who have passed the examination can donate blood.

Many friends do not know how much blood they should donate for the first time. So, how many milliliters of blood should be donated for the first time? Here are the answers:

1. For first-time blood donation, 200-400 milliliters of blood is required. According to the Blood Donation Law, each person can donate 200 to 400 milliliters of whole blood at a time, with a maximum of 400 milliliters. If donating component blood, each person can donate one to two treatment doses at a time, with a maximum of two treatment doses.

2. There are regulations on the amount of blood donation because the amount of blood in the human body is relatively stable, accounting for 7% to 8% of body weight in adults. Medical research has proven that if the blood loss does not exceed 400ml at a time, plasma and blood cells can recover to normal levels in a short period of time through the body's regulatory mechanisms, without affecting the normal operation of the body. Therefore, it is advisable to donate 200 to 400ml of blood each time.

3. The interval between two blood donations should be sufficient. Citizens can donate whole blood or component blood. The interval for donating whole blood should be at least 6 months, and the interval for donating component blood (such as platelets) should be at least 1 month. Donations should not be too frequent to avoid affecting the normal operation of the body.

4. The recovery time after blood donation varies depending on the amount of blood donated, the interval between donations, nutrition after donation, and individual differences. The water and inorganic substances lost during blood donation will return to normal levels within 1-2 hours. Plasma proteins, which are synthesized by the liver, can be replenished within one or two days. Platelets, white blood cells, and red blood cells require corresponding periods of recovery, with platelets typically taking 7-9 days and red blood cells taking 120 days. Within a month, iron, protein, vitamins, folate, and other nutrients can also gradually recover.