Abstract

BACKGROUND In the scientific literature, the impacts of plateletpheresis on leukogram parameters are not clear, with a high divergence in the studies that have evaluated changes in leukocytes. The objective of this paper was to meta-analyze the effect of plateletpheresis on the leukocyte count, based on studies published between 1980-2018. METHODS Systematic review with meta-analysis of random effects for the difference of means. The phases of the PRISMA guide were applied with 132 search strategies in Pubmed, Scielo, Science direct and Scopus. Reproducibility and evaluation of methodological quality were guaranteed. Heterogeneity was evaluated with Galbraith and Dersimonian and Laird's, publication bias with Funnel Plot and Begg; sensitivity analysis, accumulated meta-analysis and Forest Plot were carried out. RESULTS Nineteen studies were included with 2,358 donors, mostly from India, United States, Turkey, Germany and Austria. A mean difference of -0,80 x109L (IC95%= -1,96; 0,36x109L) between the predonation value and the value immediately after donation was founded; no publication bias was found and the conclusion presented good sensitivity since it does not vary with the elimination of studies in successive phases. CONCLUSIONS The donation of platelets by apheresis does not affect the leukocyte count in the donors, in the last century there were reports of reductions in this parameter, explained by the blood loss in the cases used for the procedure and by effects produced in the blood cells by the biomaterials; however, at present the high safety of plateletpheresis for the white blood cell count is evidenced.

Abstract

The effects of platelet donation by apheresis on different parameters of the erythrogram are still unclear. The objective was to meta-analyze the effect of plateletpheresis on hematocrit, hemoglobin, and erythrocyte count, with a systematic review with random effects meta-analysis of the mean difference. The PRISMA guidelines were considered, as well as 133 search strategies on four different databases. Reproducibility was guaranteed and methodological quality was evaluated. Heterogeneity was evaluated with Galbraith and DerSimonian-Laird's, publication bias with a funnel plot and a Begg's test, sensitivity analysis and a cumulative meta-analysis were also conducted. Eighteen (18) articles were included, 17 evaluated the effects on hematocrit in 2,564 donors; 13 on hemoglobin in 1,640 donors; and 4 on red blood cell count in 243 donors. A decrease of 2.26% (CI95% = 2.11-2.41) was observed in hematocrit, of 0.80 g/dL (CI95% = 0.75-0.86) in hemoglobin and -0.21 x 10(12)/L (CI95% = -0.13; -0.29) in red blood cell count. Plateletpheresis has a negative effect on the erythrogram parameters, explained by blood loss in the kits used for the procedure and cell lysis. Such evidence is relevant to secure the efficiency and safety of the procedure, improve selection processes or determine the number of donations that can be performed without affecting donors' health.