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| Artificial Blood |
Bioethics Case Studies |
For many years, Baxter International has worked on developing a type of artificial blood, called HemAssist. Artificial blood is a potentially important product. Donated blood carries the risk of HIV and hepatitis, and, though the risk is getting smaller, many people still worry about a contaminated blood supply.
Some blood substitutes are produced through recombinant DNA techniques, in which the gene for the oxygen-carrying compound in the blood, called hemoglobin, is inserted into bacteria, which then produce hemoglobin. HemAssist, on the other hand, was engineered to be produced from outdated human blood.
Although other companies are working on types of artificial blood, Baxter was the first to go into Phase III (human) trials. The blood works as a supplement to donated human blood, and it was thought the blood could be used in emergencies or in cases of shortages of specific blood types.
The Phase III trials were conducted on 117 patients in emergency rooms in Europe. The patients had traumatic injuries, caused by stabbings, gunshots, and accidents. The trials showed that more patients died in the HemAssist group than in the group receiving donated blood. This was a blow to Baxter.
Earlier, the U.S. Army had almost decided to use HemAssist for injuries in the Gulf War, but backed out because of a side effect, a slight elevation in blood pressure, which showed up in previous trials.
After these setbacks, the company is closing a $110 million plant in Switzerland. Facing a loss of $500 million investment in research and development, it has still not decided whether to discontinue its trials of HemAssist.
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