INTRODUCTION: The WAA Registry allows detailed registration of hemapheresis data. Our center registers results there as well. We summarize our results as compared to those of the WAA Registry. MATERIALS AND METHODS: Hemapheresis results are registered in the WAA Registry in Umea, Sweden. The patients' identity is protected by coding. General data (age, gender, weight, procedure, technique used etc.) or special data (occurrence and type of adverse reactions, health condition, quality of life etc.) are completed in a pre-defined form. RESULTS: In 2006-2016, we registered 7,927 hemaphereses in 956 patients in the WAA Registry; 40.4% in men and 59.6% in women aged 53±15years. There were mostly no significant differences in the individual interventions between our center and the WAA Registry; only the share of cascade filtrations/rheophereses is quite different (9 times higher in our center - 18.2% of interventions as compared to 2.1% in the WAA Registry). The share of photophereses (32.1%) is relatively high - due to cooperation with the bone marrow transplantations department. DISCUSSION AND CONCLUSION: In regular quality assessment, one center usually does not have enough data and experience with some diseases or interventions; therefore, comparison with the WAA Registry results is valuable not only for the quality of interventions but also for side effect prevention. On the other hand, the advantage is that every center has its unique code and may work quite independently (quick and independent non-competitive assessments). Five-minute duration of registration is advantageous in a time-demanding work; moreover, the registration is free.

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