Results
poisoning, femoral nerve block, femoral cutaneous nerve block, lateral cutaneous nerve block, hypoxemia, non-fracture patients45, hematoma, nerve block
HEMATOMA, COMPLICATIONS
In total, 56 patients were enrolled in the study. Three patients were excluded from the study due to the exclusion criteria described above. The consort flow chart is shown in Fig. 
Demographic data of Study Participants, n = 53
Muscle strength changes in non-fracture patients45 (85%) patients were blocked successfully. The onset time of the femoral nerve block and lateral femoral cutaneous nerve block were 15.0(2.5) min and 15.0(5.0) min, respectively. There was no significant difference between FN and FLCN in the block onset time(Z=0.53, p>0.05). 30 min later, the block effect of FN and LFCN was consistent in all patients. The EV50 of 0.33% ropivacaine is 31.75ml (95%CI, 29.16 ~ 32.50) and EV95 is 34.06ml (95%CI, 33.35 ~ 36.28). The sequence of positive and negative blocks in the evaluated patients is shown in Fig. 
The up-and-down sequence of volumes of ropivacaine 0.33% required for ultrasound supra-inguinal fascia iliaca compartment block to produce effective femoral nerve block and lateral cutaneous nerve block. □ failed block, • successful block. The minimum effective volume 95 is represented as a continuous line and the 95% confidence interval as dashed linesAll patients had no complications such as puncture site bleeding, hematoma, local anesthetic poisoning, puncture needle into blood vessels, and hypoxemia.