Statistical analysis
nerve block, Pain, pain
All data were analyzed by SAS software (version 9.4), and the indicators of each group were compared with baseline. The ropivacaine concentration-time curves were drawn, and pharmacokinetic parameters were calculated (Phoenix Win Nonlin 8.2). A fitting power model was used to evaluate the dose-linear relationship of pharmacokinetic parameters CLocal irritation scores of RODD were evaluated by descriptive statistics, and the frequency and percentage of categorical or ordinal variables were summarized. The mixed effect model was used to analyze the changes in acupuncture pain intensity at different time points before and after administration. In the model, changes in pain intensity at different time points in different administration areas compared with baseline were dependent variables. Pain intensity before administration was a covariate. Administrative area/blank area, grouping and visit point were fixed effects. The onset time and duration of RODD nerve block were compared by median (95%, CI). The analgesic intensity was calculated as a percentage, and the range of nerve block and distance adjacent to injection sites were expressed as the mean±SD.