Effect of post-storage filters vs. pre-storage filters for leukoreduction of blood components on clinical outcomes: a systematic review protocol.

Abstract

This review will synthesize the best available evidence on the effectiveness of leukocyte reduction by comparing post-storage and pre-storage filters. The review will consider the following clinical outcomes: transfusion reactions, bacterial infection, length of stay, and mortality. Transfusion is a relevant therapy, but it is not risk-free. Leukocyte reduction can be performed either by apheresis or by pre- or post-storage filters in order to reduce the risk of transfusion reactions, transmission of some diseases, alloimmunization, and platelet refractoriness. It can also reduce the length of hospital stay and the use of antibiotics. Studies comparing the transfusion of leukocyte reduction through post-storage filters with pre-storage filters in patients of any age who received a transfusion and the clinical outcomes resulting from the transfusion will be considered for inclusion. Studies in Portuguese, English, and Spanish will be considered, with no publication time limit. The research sources will include MEDLINE (PubMed), CINAHL (EBSCO), PsycINFO, Scopus, The Cochrane Library, Web of Science Core Collection, Embase, LILACS, and gray literature sources. The selection of titles and abstracts will be carried out by two independent reviewers, and the critical evaluation of the studies will be based on JBI tools. The data of interest for the review question will be extracted using JBI SUMARI. A narrative synthesis will be performed as will a meta-analysis and risk assessment of publication bias, if possible. PROSPERO: CRD42020192202.