Jeong JH, Chang MJ, Kang SB, et al. - This study was sought to ascertain if postoperative intravenous (IV) iron supplementation could decrease transfusion rate in patients undergoing staged bilateral total knee arthroplasty (TKA). Further, they explored if hemoglobin levels and iron profile differed between patients with and without postoperative IV iron supplementation. Researchers performed a retrospective, comparative cohort study including a total of 126 patients who had undergone primary staged bilateral TKA during a single hospitalization. After acute blood loss, postoperative IV iron supplementation immediately caused by TKA was not effective in improving the transfusion rate. Thus, for reducing the transfusion rate, surgeons should use protocols other than postoperative IV iron supplementation in patients undergoing staged bilateral TKA in a single hospitalization.