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An acute hemolytic transfusion reaction (AHTR), also called immediate hemolytic transfusion reaction, is a life-threatening reaction to receiving a blood transfusion. AHTRs occur within 24 hours of the transfusion and can be triggered by a few milliliters of blood. The reaction is triggered by host antibodies destroying donor red blood cells.
Hematidrosis is a condition in which capillary blood vessels that feed the sweat glands rupture, causing them to exude blood, occurring under conditions of extreme physical or emotional stress. [4] Severe mental anxiety activates the sympathetic nervous system to invoke the fight-or-flight response to such a degree as to cause hemorrhage of the ...
Blood donation pictogram Blood donation center at the University Hospital of Basel, Switzerland. From left to right: Two cell separators for apheresis, secluded office for pre-donation blood pressure measurement and blood count, and on the right, chairs for whole blood donations. A patient donating blood at a Blood Bank in Córdoba, Argentina
Xenotransfusion (from Greek xenos-'strange, foreign'), a form of xenotransplantation, was initially defined as the transfer of blood from one species into the veins of another. [1] In most cases, it is a transfer of blood between a non-human animal and a human. However, further experimentation has been done between various non-human animal species.
In 1665 another English doctor Richard Lower successfully used blood transfusion between dogs to keep them alive. [1] Karl Landsteiner is recognized as the father of transfusion medicine. Landsteiner is credited with the first classification of human blood into the four types (A, B, AB, O) of the ABO blood group system.
Blood taken from a healthy donor can be separated into its component parts during blood donation, where the needed component is collected and the unharvested components are returned to the donor. Fluid replacement is usually not needed in this type of collection. In many countries, apheresis donors can donate platelets more often than those ...
Even though red blood cells can also be collected in the process, many blood donation organizations do not do so because it takes much longer for the human body to replenish their loss. In addition, some (though not all) centers defer further platelet donations until the red blood cells can be replenished.
Bleeding, hemorrhage, haemorrhage or blood loss is blood escaping from the circulatory system from damaged blood vessels. [1] Bleeding can occur internally , or externally either through a natural opening such as the mouth , nose , ear , urethra , vagina or anus , or through a puncture in the skin .
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