[Efficacy and safety of drainage after total knee arthroplasty].

To determine whether suction drainage is safe and effective compared with no-drainage in total knee arthroplasty. The literature search was based on PubMed, MEDLINE, EMBASE, Highwire, the Cochrane Library, CBM, CNKI, VIP and WFSD.The data were analysed using RevMan 5.3.Fourteen randomised controlled trials involving 1 009 knees were included in our analysis. Suction drainage increases the rate and volume of blood transfusion.No-drainage group increases the rate of wound problems (=1.92, 95% 1.21-3.04, <0.05). No significant difference was observed in the incidence of periprosthetic infection (=0.68, 95% 0.20-2.30, =0.54), VAS (=-0.09, 95% -0.32-0.14, =0.46) and the length of stay (=0.41, 95% -0.21-1.03; =0.19) when the drainage group was compared with the no-drainage group (>0.05). No-drainage for easy total knee arthroplasty may be a better choice. However, orthopedic surgeon need to weigh the pros and cons of no-drainage in some complicated TKAs such as extra-articular deformity .