文摘
Introduction Local infiltration analgesia (LIA) is a popular method for decreasing post-operative pain after total knee arthroplasty (TKA). The goal of this meta-analysis is to compare the effect of LIA with placebo on the intensity of post-operative pain and the consumption of opioids. Methods A search was performed in the PubMed/MEDLINE, Cochrane, EMBASE and TRIP databases. All (quasi)-randomized controlled trials (RCTs) were included. LIA consists of intra-operative infiltration with at least one analgesic component. Data were pooled using Cochrane software. Results Seven placebo-controlled RCTs were included, involving 405 TKAs. On the first post-operative day, LIA provides an average decrease in VAS scores at rest of 12.3?% compared to placebo. Six RCTs studied opioid consumption in patients following TKA. There was a decrease in opioid consumption of 14.8?% compared to placebo 24?h after surgery. This suggests a reduced pain perception due to LIA. On the second post-operative day, the effect on both outcome measures was diminished and no longer significant. Heterogeneity between the studies was 71?% for pain and 39?% for opioid consumption (p?=?0.002 and p?=?0.0005). No major complications were reported with the use of LIA. Conclusion LIA might be able to decrease pain and the use of opioids on the first post-operative day following TKA. However, due to the high level of heterogeneity between the studies, no firm conclusions can be drawn. Level of evidence Meta-analysis, Level II.