Background: Thrombotic thrombocytopenic purpura (TTP) is a rare clinical disorder which was associated with poor prognosis for a long time. The outcome has been improved by the consistent introduction of thera-peutic plasma exchange (TPE) as standard treatment of TTP. Patients and Methods: We describe our experience in the use of solvent/detergent-treated plasma (SDP) for TPE in TTP. We retrospectively analyzed acute TTP epi-sodes in 8 patients (mean age = 27 years, range 18–44 years) treated with TPE using SDP with regard to tolerability and efficacy. Results: All 8 patients were positive for anti-ADAMTS-13 antibody. Seven out of 8 had a se-vere ADAMTS-13 deficiency. All patients responded rapidly to SDP TPE with an increase in platelet count to above 150 × 109/l. Hemolytic anemia disappeared over the treatment period. Approximately 2,000 l SDP were used for more than 500 treatments. Treatment with SDP was well tolerated; none of the patients experienced an adverse drug reaction after exposure to SDP. No major complications occurred even after multiple TPE. Conclusion: Our investigations suggest that TPE using SDP as replacement fluid is an effective treatment for TTP. The data described also indicate that SDP might offer the benefit of reducing adverse drug reactions.

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