The Assessment of Blood Loss During Total Knee Arthroplasty When Comparing Intravenous vs Intracapsular Administration of Tranexamic Acid.
Administration of tranexamic acid topically and intravenously has demonstrated effectiveness in decreasing blood loss and transfusion rates.



We randomized 131 patients undergoing primary total knee arthroplasty to receive either intracapsular (69) or intravenous tranexamic acid (62). Postoperative blood loss was calculated using the formula derived by Nadler et al. The number of units transfused was recorded, as well as length of hospital stay.



We found no statistically significant difference on calculated blood loss (postoperative day [POD] 1: 624 ± 326 vs 644 ± 292; P = .71, POD 2: 806 ± 368 vs 835 ± 319; P = .64, and POD 3: 1076 ± 419 vs 978 ± 343; P = .55). There was no difference in number of blood transfusions, length of stay, or complications.



Intracapsular tranexamic acid is not inferior to intravenous tranexamic acid in decreasing blood loss and blood transfusion rate in primary total knee arthroplasty.
Department of Orthopaedic Surgery, Boonshoft School of Medicine, Wright State University, Dayton, Ohio.
Jedediah H
JH
May
Department of Orthopaedic Surgery, Boonshoft School of Medicine, Wright State University, Dayton, Ohio.
Geoffrey R
GR
Rieser
Department of Orthopaedic Surgery, Boonshoft School of Medicine, Wright State University, Dayton, Ohio.
Chad G
CG
Williams
Department of Internal Medicine, Boonshoft School of Medicine, Wright State University, Dayton, Ohio.
Ronald J
RJ
Markert
Orthopaedic Institute of Dayton, Dayton, Ohio.
Ryan D
RD
Bauman
Department of Orthopaedic Surgery, Boonshoft School of Medicine, Wright State University, Dayton, Ohio.
Matthew W
MW
Lawless
D061605:Administration, Intravenous; D000368:Aged; D000933:Antifibrinolytic Agents / Q000008:administration & dosage*; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects* / Q000706:statistics & numerical data; D016063:Blood Loss, Surgical / Q000517:prevention & control* / Q000706:statistics & numerical data; D001803:Blood Transfusion / Q000706:statistics & numerical data; D005260:Female; D006801:Humans; D007270:Injections, Intra-Articular; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D019106:Postoperative Hemorrhage / Q000209:etiology / Q000517:prevention & control*; D011184:Postoperative Period; D014148:Tranexamic Acid / Q000008:administration & dosage*
D000933:Antifibrinolytic Agents; D014148:Tranexamic Acid
blood conservation; intra-articular; intracapsular; intravenous; total knee arthroplasty; tranexamic acid