Stamenic 2009.

Methods	Participants undergoing total hip arthroplasty were randomised into two groups. The method of randomisation and allocation is not described. The blinding status of study participants, personnel, and outcome assessors is not described.
Participants	40 participants were randomised to one of two groups: Group 1 (Autotransfusion): N = 20. Ratio of primary:revision THA = 11:9 Group 2 (Control) No further demographic information is available for each group, and it is not known whether there was baseline balance between groups following randomisation.
Interventions	Group 1 (Autotransfusion): underwent postoperative cell salvage and autotransfusion using the Haemovac Autotransfusion System (Zimmer Company). Group 2 (Control): did not undergo postoperative cell salvage and autotransfusion and, instead, received classic wound drainage postoperatively.
Outcomes	Outcomes reported: average time of blood collection and reinfusion, average amount of reinfusion blood, postoperative haemoglobin and haematocrit levels, coagulation status, incidence of complications
Notes	Transfusion protocol: use of a transfusion protocol is not reported Prospective registration status: unclear whether the study was registered prospectively Ethical approval: unclear whether the study was approved by an ethics committee or institutional review board Language: abstract is published in English Reason for awaiting classification status: study is published as an abstract only, and the abstract lacks the information needed to determine whether the study meets eligibility criteria for inclusion