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Table 2 Blood loss and blood transfusions

From: Peri-articular tranexamic acid injection in total knee arthroplasty: a randomized controlled trial

Variable Group 1: Peri-articular group (n = 30) Group 2: Intravenous group (n = 30) P value*
Blood in Hemovac drain(ml)    
 24-h postoperative 300 (+/− 128) 334 (+/− 124) 0.279
 48-h postoperative 145 (+/− 92) 186 (+/− 106) 0.094
Total 445 (+/− 158) 520 (+/− 175) 0.081
Hematocrit (%)    
 Preoperative 36.4 (+/− 3.6) 37.6 (+/− 3.5) 0.226
 24-h postoperative 29.7 (+/− 3.4) 30.4 (+/− 4.0) 0.550
 48-h postoperative 31.0 (+/− 2.7) 31.8 (+/− 3.4) 0.352
Total Hct change (%) (pre op – 48 hr) −5.4 (+/− 3.1) −5.8 (+/− 4.4) 0.730
Hemoglobin (g/dL)    
 preoperative 12.01 (+/− 1.27) 12.27 (+/− 1.30) 0.628
 24-h postoperative 9.69 (+/− 1.19) 10.09 (+/− 1.50) 0.215
 48-h postoperative 10.16 (+/− 0.98) 10.40 (+/− 1.28) 0.693
Total Hb change (g/dL) (pre op – 48 hr) −1.85 (+/− 0.95) −1.87 (+/− 1.37) 0.840
Total blood transfusion (PRC in unit) 12 8 -
Number of patients with blood transfusion 9 7 0.928
  1. Values are number or mean (+/−Standard deviation = SD)
  2. *P < 0.05 considered significant