Long‐Term Follow‐Up of Donors Cytapheresed More Than 50 Times

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Abstract
Volunteers (11) who had donated white blood cells or platelets more than 50 times over a 5- to 9-yr period were studied to determine whether any adverse consequences of many cytaphereses could be detected. Among the donors no significant differences were found in 18 hematological and biochemical parameters when compared to a group of age- and sex-matched nondonor controls. Despite extensive cumulative lymphocyte losses sustained by these donors, the ratio of T, B, helper and suppressor cell was maintained within the normal range. No detrimental effects of multiple cytapheresis on the donors'' health has been demonstrated to date.