SOMERVILLE, N.J., Sept. 11 /PRNewswire/ -- A randomized study comparing treatment with plasma-derived human thrombin and thrombin derived from bovine sources shows that human thrombin is as effective as bovine thrombin in achieving hemostasis in patients at three-, six- and 10-minute intervals. The study of 305 patients with mild or moderate bleeding during elective cardiovascular, neurological or general surgical procedures also showed that human thrombin was less likely to result in an immune response in patients as compared to bovine thrombin. Study results were presented Friday at the Society for the Advancement of Blood Management meeting in Los Angeles. The study was supported by ETHICON, Inc.