|28/01/2009, 12:58||رقم المشاركة : 1|
بربي جاوبولي على الأسئلة التالية بالأنقليزيّة و أجوبة مبسطة :
at what age can one start donating blood?-1-
how much bloodcan one give at a time?-2-
how often can one donate blood?-3-
when are blood collecting campaigns help?-4-
who can't giveblood?-5-
|28/01/2009, 15:58||رقم المشاركة : 2|
Blood donation is the process of giving blood to be used for blood transfusions. A person who gives blood for this purpose is called a donor. The Food and Drug Administration (FDA) has strict rules for the collection, processing, storage, and transportation of blood and blood components. These regulations are important because they ensure that infectious diseases are not transmitted during blood transfusions.
Blood donation is extremely important because it is the only way to maintain sufficient blood supplies for medical treatment. That's why local hospitals, blood banks, and the American Red Cross sponsor frequent blood drives. Because many people feel more comfortable knowing the source of the blood for a transfusion, many donors are friends or family members of a recipient. This is called a direct donation, and the blood is stored at the hospital for a specific patient's use.
All blood donors are carefully screened for conditions that would make them poor candidates for blood donation. If you have hepatitis, AIDS, certain types of cancer, heart disease, severe asthma, malaria, bleeding disorders, low blood pressure, or high blood pressure, you may not donate blood. You also may not donate if you have been exposed to the AIDS virus, are pregnant, have had recent surgery, or are using certain drugs. All these precautions are in place to protect the people who might receive your blood. The process of giving blood, however, is extremely safe.
The facility where you donate will use sterile equipment so you cannot catch an infection. You may not give blood more often than once every two months. If you know you will be undergoing surgery, you may want to donate your own blood about a month before your surgery. This is called an autologous transfusion, and the blood you donate is stored at the hospital for your use only. If you need a transfusion during or after surgery, your own blood will be used.
Before you donate blood, the healthcare professional will check your blood pressure, temperature, and pulse. You will lie down on a bed or cot, then he or she will tighten a wrapping, called a tourniquet, on your upper arm to increase the pressure on the veins in your arm so they will swell. This makes it easier to identify the larger veins and to insert the needle into the vein. The healthcare professional will clean the area where the needle will be inserted with an antiseptic wash, then insert a large needle into the vein. You will feel a slight sting as the needle goes in, but the rest of the procedure should be painless. The blood flows through a tube into a sterile plastic bag that holds around one pint (450 ml) of blood, also called one unit. People usually donate one unit at a time. The average man has 10 to 12 pints of blood in his body, while the average woman has 8 to 9 pints. A small sample of the blood you donate is put aside for testing for infectious diseases. No blood is used until all test results have shown that it is safe. All donated blood is also classified and labeled by type, either A, B, AB, or O, and as RH-positive or RH-negative. This is because donor blood must be matched to the recipient's blood type. The sterile bags, which contain preservatives and an agent that prevents clotting, are kept refrigerated. Whole blood is usable for 42 days.
Donated blood can also be broken down into blood components, which include red blood cells, white blood cells, platelets, immunoglobulins, or fresh frozen plasma, which is the liquid part of the blood. Perhaps you are donating blood because someone you know needs a blood component like platelets, which help with blood clotting. A special instrument can be used to separate your blood into components, keep the platelets, then pump the remaining components back into your body. This procedure is called apheresis.
Some patients may feel light-headed when they first stand up after donating blood. You will be given juice to drink and ******s or crackers to eat to begin replacing fluids and increase your blood sugar levels. You will be told to drink plenty of liquids to replace lost fluids and to avoid strenuous activity for the remainder of the day. You may feel a little sore around the area where the needle was inserted, and their is a slight chance of infection in that area if it wasn't well cleaned before the needle was inserted. Your blood volume will return to normal within hours after donating blood if you follow the guidelines for drinking liquids. It takes several weeks, however, to replace donated blood cells and platelets
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|28/01/2009, 20:33||رقم المشاركة : 3|
سالخص لك ماقاله الدكتور onasnas
.2.Are taken from 400 to 450 milliliters, which is about 12-1 of the volume of blood inside the body of every human
being, which ranges from 5
3.Men can donate every two months, and women every three months. Body begins to compensate the loss of blood, which was soon to donate blood
4. blood is collected in The hospital's blood bank
5.we cant give blood when there is chronic respiratory diseases.
• chronic hypertension.
• viral hepatitis.
• cases of kidney failure.
• cases of epilepsy and convulsions, and frequent fainting.
• increase or hypothyroidism.
• bleeding diseases.
• hereditary diseases.
• mental illness.
• any operations during the period of three months
• All types of anemia other than iron deficiency anemia.
• heart disease, rheumatic fever
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