Asakura Y, Yano T, Takagi H, Tsuchiya H, Kato T. The incidence of development of motor blockade by ropivacaine is concentration dependent, and most studies regarding the continuous FNB after total knee arthroplasty used 0.2% to 0.3%ropivacaine. J Arthroplasty. 2010 Aug;25(5):836; author reply 837–8. doi: 10.1016/j.arth.2010.03.006. PMID: 20381286.
The incidence of development of motor blockade by ropivacaine is concentration dependent, and most studies regarding the continuous FNB after total knee arthroplasty used 0.2% to 0.3%ropivacaine