Temporary 12-Hour Drain Clamping versus 3-Hour Drain Clamping in Simultaneous Bilateral Total Knee Arthroplasty.

Compared to the 3-hour clamping protocol, the 12-hour clamping protocol significantly reduced transfusion requirements, estimated blood loss volume, and hemoglobin and hematocrit levels after SBTKA. We suggest that 12-hour temporary clamping should be considered for reducing transfusion rates.