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Table 2 Surgical and postoperative information of the selected 12 RCTs

From: No clear benefit or drawback to the use of closed drainage after primary total knee arthroplasty: a systematic review and meta-analysis

References Tourniquet CD DRT Drain clamping CPM Thromboprophylaxis VP Transfusion standard
Adalberth 1998 [17] Yes Yes 24 h UC Yes Enoxaparin UC Hb <90 g/L
Cao 2011 [6] Yes Yes UC UC UC LMWH UC Hb <10 g/dL
Crevoisier 1998 [10] Yes UC 48 h UC Yes LMWH UC UC
Esler 2003 [11] Yes Yes 48 h UC UC Aspirin UC Hb <10 g/dL
Fan 2013 [5] UC UC 24–48 h UC UC LMWH UC UC
Holt 1997 [16] Yes Yes 48 h UC No No UC Hb <8 g/dL
Jenny 2001 [9] Yes Yes 48 h UC UC LMWH UC Hct <30 %
Kim 1998 [3] Yes UC 24 h UC UC No UC UC
Liu 2014 [7] Yes Yes 24 h Yes/4 h Yes Nadroparin Yes Hb <90 g/L
Niskanen 2000 [8] Yes Yes NM UC UC LMWH UC UC
Omonbude 2010 [2] Yes Yes 20.1 h UC UC No Yes UC
Ovadia 1997 [4] Yes Yes 48 h UC Yes Heparin UC Hb <8 g %
  1. Abbreviations: CD compressive dressings, DRT drainage remove time, CPM continuous passive motion, VP venous pump, UC unclear, LMWH low molecular weight heparin, Hb haemoglobin, Hct haematocrit