The optimal dosage, route and timing of glucocorticoids administration for improving knee function, pain and inflammation in primary total knee arthroplasty: A systematic review and network meta-analysis of 34 randomized trials.

Glucocorticoids are a mainstay to control postoperative pain, inflammation, nausea and vomiting (PONV) in total knee arthroplasty (TKA). Understanding the optimal dose and route of glucocorticoids administration in TKA is of great significance in speedy functional recovery. We aimed to summarize, evaluate and rank order the efficacy of glucocorticoids regimens in TKA. Electronic databases (PubMed et al.) were systematically searched from inception up to April 30, 2020. The primary outcomes were visual analogue scale (VAS), range of motion (ROM) and knee society score (KSS). C-reactive Protein (CRP) and PONV were also evaluated. Multivariable Bayesian random effects models were used to synthesize and rank the comparative efficacy of glucocorticoids regimens. A total of 34 eligible randomized controlled trials with 11 different glucocorticoids regimens were assessed. Overall inconsistency and heterogeneity were acceptable. Multiple medium dose perioperative intravenous injection (IV) ranked first in the analgesia network and a single high doses of preoperative IV ranked first in the inflammation and PONV network. There was no statistically significant increase in ROM or KSS in all the glucocorticoid formulations and doses compared with controls on postoperative day 30. Glucocorticoid multiple intravenous injection was preferable to a single intravenous injection (preoperative and postoperative), periarticular injection and intra-articular injection in analgesia. Based on the available evidence, a medium dose of hydrocortisone of 2-4 mg/kg is optimal.

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