Organ procurement of kidneys is a relatively widespread practice. For the heart normothermic preservation has been used in which the heart is provided with warm oxygenated blood and so continues to beat ex-vivo during its preservation. This technique has also been applied to lungs and led to the emergence of donor lung reconditioning centres in North America. For the liver, hypothermic and normothermic techniques are being used with evidence to suggest that both may be beneficial . The HOPE (HIV Organ Policy Equity) Act allows for clinical research on organ transplantation from HIV+ donors to HIV+ recipients. The Act was passed by
Blood to an excess of blood, according to Hippocratic medicine. According to the "Oxford English Dictionary", the word "blood" dates to the oldest English, circa 1000 CE. The word is derived from Middle English, which is derived from the Old English word "blôd", which is akin to the Old High German word "bluot", meaning blood. The modern German word is "(das) Blut." Fåhræus (a Swedish physician who devised the erythrocyte sedimentation rate) suggested that the Ancient Greek system of humorism, wherein the body was thought to contain four distinct bodily fluids (associated with different temperaments), were based upon the observation of