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Apheresis is obtained from one donor, donors are connected to a machine that can clean up blood and only take platelets. The remaining cells and blood plasma are then returned to the donor's body. The purpose of this study was to determine the effectiveness of apheresis methods on the quality of blood products in UTD PMI Surabaya. This type of research uses a post test only control design, which was conducted on November 1st, 2019 - March 30th, 2020 with a sample of 50 TC Apheresis and 50 TCdoi:10.30994/sjik.v9i2.511 fatcat:wcc7du7dkzcndiep4yyjulwgj4