Narula 2015.

Methods	Participants undergoing heart valve replacement were randomly assigned to one of two groups. The method of randomisation and allocation concealment is not described. The blinding status of study participants, personnel, and outcome assessors is not described.
Participants	50 participants undergoing heart valve replacement on cardiopulmonary bypass were randomised to one of the two groups: Intraoperative autologous donation (IAD)group (Autotransfusion): N = 25 Control group: N = 25 The authors do not comment on whether any differences existed between groups at baseline.
Interventions	Intraoperative autologous donation (IAD) group (Autotransfusion): participants had 15% of their estimated blood volume extracted and simultaneously replaced with 1:1 colloid. Control group: participants received standard care and were not subject to IAD.
Outcomes	Outcomes reported: thoracic fluid content (TFC), right atrial pressure, mean arterial pressure, peak and mean airway pressures and oxygenation index, exposure to banked blood transfusion, amount of allogeneic blood transfused, blood component therapy requirement, incidence of massive blood transfusion
Notes	Transfusion protocol: a transfusion protocol is not reported in the abstract. Prospective registration status: it is not clear whether the study was registered prospectively. Ethical approval: it is not clear whether the study received approval from an ethics committee or institutional review board. Language: the abstract is published in English. Reason for awaiting classification status: information for this study is available from a published conference abstract only. There is insufficient information to determine whether the study meets eligibility criteria for inclusion.