Wataru Takayama said: “Our results also raise questions about how emergency transfusion of O type red blood cells to a severe trauma patient could affect homeostasis, the process which causes bleeding to stop, and if this is different from other blood types. The authors suggest that a lower level of the factor is a possible explanation for the higher death rate in trauma patients with blood type O. Lower levels of von Willebrand factor may be linked to higher levels of haemorrhage. Patients with blood type O have been shown to have lower levels of von Willebrand factor, a blood clotting agent, than those with other blood types. We wanted to test the hypothesis that trauma survival is affected by differences in blood types.” Loss of blood is the leading cause of death in patients with severe trauma but studies on the association between different blood types and the risk of trauma death have been scarce. Wataru Takayama, the corresponding author said: “Recent studies suggest that blood type O could be a potential risk factor for hemorrhage (bleeding in large quantities). Researchers at Tokyo Medical and Dental University Hospital, Japan found that severe trauma patients (those with an injury that has the potential to cause long-term disability or death) with blood type O had a death rate of 28%, compared to a rate of 11% in patients with other blood types.ĭr. Blood type O is associated with high death rates in severe trauma patients, according to a study published in the open access journal Critical Care that involved 901 Japanese emergency care patients.
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