Objective:To compare the analgesic effect of femoral triangle block and adductor canal block after total knee arthroplasty.Methods:Clinical studies comparing the analgesic efficacy of femoral triangle block and adductor canal block after total knee arthroplasty were retrieved from CNKI, Wanfang Data Knowledge Service Platform, VIP, Chinese Medical Journal Full-text Database, PubMed, Embase, and the Cochrane Library, with the retrieval time ranging from the establishment of the databases to October 2024. Data on knee pain scores, morphine consumption, quadriceps muscle strength, postoperative timed up-and-go test (TUGT), and postoperative complications were extracted. The modified Jadad scale was used to evaluate the methodological quality of the included literature. Meta-analysis was performed using Stata 18.0 statistical software.Results:A total of 670 patients from 9 randomized controlled trials were included in the meta-analysis. There were 333 patients in the femoral triangle block group, with an average age of 60.6-72.3 years, and there were 337 patients in the adductor canal block group, with an average age of 61.7-73.5 years. All the 7 English articles were of high quality, and the modified Jadad score was 6-7 points. Two Chinese articles were of low quality and the modified Jadad score was 3. The results of meta-analysis showed that there were no statistically significant differences between the two groups in postoperative morphine consumption [ SMD=0.13, 95% CI(-0.45, 0.71), P=0.658], postoperative 24h knee resting pain score [ SMD=-0.35, 95% CI(-1.48, 0.78), P=0.545], postoperative 48h knee resting pain score [ SMD=-0.56, 95% CI(-1.71, 0.60), P=0.347], postoperative 24h TUGT [ SMD=0.01, 95% CI(-0.27, 0.30), P=0.933], postoperative 48h TUGT [ SMD=0.04, 95% CI(-0.61, 0.69), P=0.905], and incidence of postoperative complications [ RR=1.17, 95% CI(0.56, 2.45), P=0.669]. The quadriceps strength of the adductor canal block group was greater than that of the femoral triangle block group at 24 h after operation, and the difference was statistically significant [ WMD=-0.73, 95% CI(-0.93, -0.53), P<0.001]. Conclusions:Both femoral triangle block and adductor canal block can effectively relieve pain after total knee arthroplasty. Patients with adductor canal block have better muscle strength recovery in the early postoperative period.

Objective:To compare the analgesic effect of femoral triangle block and adductor canal block after total knee arthroplasty.Methods:Clinical studies comparing the analgesic efficacy of femoral triangle block and adductor canal block after total knee arthroplasty were retrieved from CNKI, Wanfang Data Knowledge Service Platform, VIP, Chinese Medical Journal Full-text Database, PubMed, Embase, and the Cochrane Library, with the retrieval time ranging from the establishment of the databases to October 2024. Data on knee pain scores, morphine consumption, quadriceps muscle strength, postoperative timed up-and-go test (TUGT), and postoperative complications were extracted. The modified Jadad scale was used to evaluate the methodological quality of the included literature. Meta-analysis was performed using Stata 18.0 statistical software.Results:A total of 670 patients from 9 randomized controlled trials were included in the meta-analysis. There were 333 patients in the femoral triangle block group, with an average age of 60.6-72.3 years, and there were 337 patients in the adductor canal block group, with an average age of 61.7-73.5 years. All the 7 English articles were of high quality, and the modified Jadad score was 6-7 points. Two Chinese articles were of low quality and the modified Jadad score was 3. The results of meta-analysis showed that there were no statistically significant differences between the two groups in postoperative morphine consumption [ SMD=0.13, 95% CI(-0.45, 0.71), P=0.658], postoperative 24h knee resting pain score [ SMD=-0.35, 95% CI(-1.48, 0.78), P=0.545], postoperative 48h knee resting pain score [ SMD=-0.56, 95% CI(-1.71, 0.60), P=0.347], postoperative 24h TUGT [ SMD=0.01, 95% CI(-0.27, 0.30), P=0.933], postoperative 48h TUGT [ SMD=0.04, 95% CI(-0.61, 0.69), P=0.905], and incidence of postoperative complications [ RR=1.17, 95% CI(0.56, 2.45), P=0.669]. The quadriceps strength of the adductor canal block group was greater than that of the femoral triangle block group at 24 h after operation, and the difference was statistically significant [ WMD=-0.73, 95% CI(-0.93, -0.53), P<0.001]. Conclusions:Both femoral triangle block and adductor canal block can effectively relieve pain after total knee arthroplasty. Patients with adductor canal block have better muscle strength recovery in the early postoperative period.

Objective To evaluate the effect of ulinastatin on the expression of aquaporin-4 (AQP4) during focal cerebral ischemia-reperfusion (I/R) in rats.Methods One hundred and thirty-five male adult SpragueDawley rats,weighing 230-280 g,were randomly divided into 3 groups (n =45 each):sham operation group (S group),I/R group and ulinastatin group (group U).The rats were anesthetized with intraperitoneal 10％ chloral hydrate 3.5 ml/kg.Focal cerebral ischemia was induced by 2 h middle cerebral artery occlusion followed by 24 repeffusion.In U group,ulinastatin 100000 U/kg was injected immediately after beginning of reperfusion,while the equal volume of normal saline was injected in S and I/R groups.The rats were sacrificed at 6,24 and 48 h of repeffusion and brains were removed for determination of infract volume (by TTC),brain water content and expression of AQP4 (by immunohistochemistry) in brain tissues.Results Compared with S group,the infarct volume and brain water content were significantly increased,and the expression of AQP4 was up-regulated at each time point in I/R and U groups (P ＜ 0.05).Compared with I/R group,the infarct volume and brain water content were significantly decreased,and the expression of AQP4 was down-regulated at each time point in U group (P ＜0.05).Conclusion The mechanism by which ulinastatin mitigates focal cerebral I/R injury is related to down-regulation of AQP4 expression in brain tissues.