• İsmail Dikmen, Ozkan Kose, Albert Cakar, Ersin Tasatan, Mehmet Barıs Ertan, and Dilek Yapar.
• Department of Orthopedics and Traumatology, Antalya Training and Research Hospital, Varlık mah., Kazım Karabekir Cd., Muratpasa, 07100, Antalya, Turkey.
• Arch Orthop Trauma Surg. 2023 Jun 1; 143 (6): 330933173309-3317.

PurposeThe purpose of this randomized controlled study was to examine the effect of sealing the intramedullary canal with a bone or cement plug or leaving it empty on postoperative bleeding and pain MATERIALS AND METHODS: A total of 120 patients with knee osteoarthritis who underwent unilateral TKA participated in the trial and were assigned to one of three groups. The femoral canal was sealed with an autogenous bone plug (Group I) or cement plug (Group II), or it was left open (Group III). Estimated blood loss, Hemoglobin decline, bleeding into the drain, and postoperative pain w compared between groups.ResultsSix patients were excluded due to various reasons, and the remaining 114 patients were included in the final analysis. There were no significant variations in baseline clinical characteristics between the three groups (p > 0.05). Hemoglobin reduction between preoperative and 72 h after the surgery (p: 0.034) and estimated blood loss (p: 0.003) were significantly different between groups. The cement plug group showed the least bleeding. Although there was a significant difference between the cement and empty canal groups (p: 0.03 and p: 0.002, respectively), the difference between the cement and bone groups was similar regarding both hemoglobin reduction and estimated blood loss. The blood volume in the suction drain (p: 0.598) and transfusion rate (p: 0.087) were similar between the groups. VAS at the 12 h after the surgery was similarly high in each group (p: 0.676). It declined at 36 h after surgery, but no significant difference was determined between groups (p: 0.815).ConclusionsThis study showed that estimated blood loss and hemoglobin reduction were significantly lower in the cement plug group than in the empty canal group. But bone plug group did not show any difference with both empty canal and cement plug groups. Sealing the IM canal or leaving it open did not change the bleeding into the drain, transfusion rate, and postoperative pain between groups. Based on these findings, sealing the IM canal with a cement plug might be recommended to diminish bleeding during TKA despite similar transfusion rates.Level Of EvidenceLevel I, randomized controlled trial.© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

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