Vilhelmsen F, Nersesjan M, Andersen JH, et al. - Whether an increased volume of ropivacaine would result in greater coverage of incisions used for total hip arthroplasty (THA), was investigated in this randomized, blinded trial in 20 healthy volunteers. In a randomized manner, researchers allocated the participants to receive bilateral LFCN [lateral femoral cutaneous nerve (LFCN)]-blocks with 8 mL ropivacaine 0.75% on the left side and 16 mL ropivacaine 0.75% on the right side, or vice versa. Using invisible ultraviolet-paint, they depicted incision lines for posterior and lateral THA approaches prior to nerve block performance. They used temperature and mechanical discrimination tests to map the blocked area. The monitoring of quadriceps muscle strength was also performed. Coverage of the posterior incision line evaluated by temperature discrimination test was the primary outcome. Although greater coverage of posterior or lateral incision lines used for THA was not achieved with an LFCN-block with increased volume of ropivacaine from 8 mL to 16 mL but this did provide a larger blocked sensory area.