Comparison between autologous blood transfusion drainage and no drainage/closed-suction drainage in primary total hip arthroplasty: a meta-analysis

12 randomized controlled trials were included in this meta-analysis which focused on postoperative outcomes and complications in patients treated with autologous blood transfusion drainage, closed suction drainage or no drainage following primary total hip arthroplasty. Data on blood loss, transfusion rate, Hb level, hematoma, swelling, postoperative pain, hospital stay, and complications was considered for meta-analysis. Results indicated postoperative Hb level, transfusion rate, postoperative pain, and length of hospital stay found no significant differences between the three drainage options. While pooled estimates suggested potentially lower blood loss with ABT drainage compared to no drainage, as well as a lower incidence of superficial infection compared to either no drainage or closed suction drainage. It should be noted that pooling was limited to a small number of studies and that larger randomized controlled trials are needed to provide further assessment.