An evidence-based approach to red blood cell transfusions in asymptomatically anaemic patients.

Abstract:

INTRODUCTION:Surgeons and physicians encounter blood transfusions on a daily basis but a robust evidence-based strategy on indications and timing of transfusion in asymptomatic anaemic patients is yet to be determined. For judicious use of blood products, the risks inherent to packed red blood cells, the patient's co-morbidities and haemoglobin (Hb)/haematocrit levels should be considered. This review critiques and summarises the latest available evidence on the indications for transfusions in healthy and cardiac disease patients as well as the timing of transfusions relative to surgery. METHODS:An electronic literature search of the MEDLINE(®), Google Scholar™ and Trip databases was conducted for articles published in English between January 2006 and January 2015. Studies discussing timing and indications of transfusion in medical and surgical patients were retrieved. Bibliographies of studies were checked for other pertinent articles that were missed by the initial search. FINDINGS:Six level 1 studies (randomised controlled trials or systematic reviews) and six professional society guidelines were included in this review. In healthy patients without cardiac disease, a restrictive transfusion trigger of Hb 70-80g/l is safe and appropriate whereas in cardiac patients, the trigger is Hb 80-100g/l. The literature on timing of transfusions relative to surgery is limited. For the studies available, preoperative transfusions were associated with a decreased incidence of subsequent transfusions and timing of transfusions did not affect the rates of colorectal cancer recurrence.

journal_name

Ann R Coll Surg Engl

authors

Chan AW,de Gara CJ

doi

10.1308/rcsann.2015.0047

subject

Has Abstract

pub_date

2015-11-01 00:00:00

pages

556-62

issue

8

eissn

0035-8843

issn

1478-7083

journal_volume

97

pub_type

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