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. Author manuscript; available in PMC: 2012 Mar 1.
Published in final edited form as: Reg Anesth Pain Med. 2011 Mar–Apr;36(2):116–120. doi: 10.1097/aap.0b013e3182052505

Figure 2.

Figure 2

Effect of an extended femoral perineural ropivacaine infusion on improvement from preoperative baseline of health-related quality-of-life following tricompartment knee arthroplasty, as measured with the Western Ontario and McMaster Universities Osteoarthritis Index. Data are expressed as mean for patients randomly assigned to an extended continuous femoral nerve block (perineural ropivacaine from surgery through postoperative day 4) or overnight continuous femoral nerve block (perineural ropivacaine from surgery through 06:00 postoperative day 1 followed by perineural normal saline through postoperative day 4). The two treatment groups had similar scores at all individual time points (p>0.05).