Limitations
pain
The present study does have some limitations. First, the study was conducted at a single center and the sample size was relatively small, so the conclusions can not be generalized. Further studies at multiple centers are required to generalize the results. Second, the assessment of VAS pain scores is expected to last for 24 h, especially at the 10h and 12h postoperatively time points, the patient may fall asleep, so the assessment may disrupt the patients’ sleep and impair the patients’ postoperative recovery. Third, it is a standard practice in our center to use 15 ml of 0.25% ropivacaine for IBPB, additional studies are required to research different dosages and concentrations of local anesthetics for IBPB.