Fig. 4From: A randomized controlled trial on the effects of collagen sponge and topical tranexamic acid in posterior spinal fusion surgeriesPostoperative blood content in drainage. The calculated actual postoperative blood loss in experimental groups is also less than control group in POD 1 as well as total volume, and TXA group shows the best effect. There was no significant difference in 3 groups in POD 2Back to article page