To use gravity as free primary force for induction. Same reason why catheterized urine bags are below the patient.
that the blood types are the same or compatible
Yes. It can be.
After an operation, many patients need a blood transfusion.
I survived many years ago by getting a blood transfusion.
No, blood cannot be drawn during a transfusion as the purpose of a transfusion is to provide blood to the patient, not to remove blood from them. Drawing blood during a transfusion would disrupt the process and potentially cause harm to the patient.
The patient benefits from blood salvage by the elimination of the risk of blood-transmitted virus or blood transfusion reactions.
A blood transfusion - is giving a patient a quantity of blood to replace any that's been lost though an accident or injury. A small sample of the patient's blood is analysed to determine the blood group & type. This is 'cross-matched' with blood of the same type stored at the hospital. A unit (or 'bag') of blood is hung above the patient from a metal stand, and a needle leading from the bag is inserted into a vein in the patient. A combination of gravity, and the patient's heartbeat drains the blood from the bag into the body. The bag is replaced when empty or the donation is stopped once the patient's blood pressure returns to normal.
there is nothing to forgive, when a blood transfusion is required, the doctor in charge will do so to save the patient's life, end of story.
transfusion
yes
A Group and Screen is taken pre transfusion, this is to check the blood group to ensure the patient recieves the correct blood group.
If a transfusion is given to a patient from a person with a different blood type, the immune system will attack those blood cells. This can cause a severe reaction in the patient, including shock to the immune system or death.