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Table 2 The compartment of clinical indicators before and after surgery

From: Delayed drainage versus autotransfusion drainage and routine drainage after total knee arthroplasty: a comparative study

Group Postoperative hemoglobin (g/L) Drainage volume (mL) Number of allogeneic blood transfusion Maximum postoperative body temperature Upper patellar diameter difference before and after surgery (cm) Joint motion (degree)
First day Third day Seventh day
Routine drainage (n = 18) 81.33 ± 9.86 666.1 ± 155.0 8 37.26 ± 0.55 36.89 ± 0.66 36.79 ± 0.53 2.56 ± 1.20 110.56 ± 11.36
Blood transfusion (n = 25) 91.96 ± 9.57** 799.2 ± 196.7* 4* 37.70 ± 0.53** 37. 31 ± 0.44* 37.09 ± 0.37* 2.68 ± 1.10 108.00 ± 11.27
Delayed drainage (n = 18) 91.50 ± 7.92** 381.7 ± 129.2** 2* 37.27 ± 0.41 36.67 ± 0.47 36.67 ± 0.48 2.33 ± 0.89 107.50 ± 10.77
Statistics F = 7.616 F = 24.167 χ2 = 5.087 F = 4.953 F = 6.834 F = 7.616 F = 0.406 F = 0.365
P value 0.001 0.000 0.079 0.011 0.002 0.001 0.669 0.696
  1. Compared with routine drainage group, *p < 0.05, **p < 0.01. Compared with blood transfusion group p < 0.05, p < 0.01.