NCT01468129.

Methods	Participants scheduled for one‐stage bilateral total hip arthroplasty were randomised 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	Participants aged 21 years and over scheduled for one‐stage bilateral total hip arthroplasty were randomised to one of two groups: Cell Saver (Autotransfusion) group Non cell saver (Control) group
Interventions	Cell saver group (Autotransfusion) group: participants underwent one‐stage bilateral total hip arthroplasty with cell saver Non cell saver (Control) group: participants underwent one‐stage bilateral total hip arthroplasty without cell saver
Outcomes	Outcomes reported: there are no outcomes available for this study
Notes	Transfusion protocol: it is unclear whether there was a transfusion protocol. Prospective registration status: it is unclear whether the study was registered prospectively or retrospectively from the trial registration information on clinicaltrials.gov. Ethical approval: it is not clear whether the study was approved by an ethics committee or institutional review board. Language: information on the trial registration is published in English. Reason for awaiting classification status: this study has been identified within the clinicaltrials.gov registration database only. Study Start Date: November 2011 Primary Completion Date: December 2012 Last Update Posted: 9 November 2011 Recruitment status was: Recruiting Recruitment Status: Unknown The study has been completed for over two years; however, no publications or data are available. There is insufficient information available to determine whether the study meets eligibility criteria for inclusion.