Objective To explore the value of dual energy CT displaying knee joint torn posterior cruciate ligament (PCL). Methods Ten cases with single knee joint torn PCL were scanned by 1.5 TMR and dual energy CT. By the use of postprocessing technique of muhiplanar reformation (MPR) and volume rendering technique (VRT), the CT value,length,thickness of PCL were assessed by paired t test respectively. Results MPR and VRT clearly displayed the PCL. The CT value of the patient sides and normal sides were(60.10±3.21), (72.98±7.35) HU(t=4.33,P=0.006), the length were(4.42±0.56),(4.14±0.49) cm (t=-1.20,P=0.285), the thickness of the attachment site and middle sire were (0.88±0.19), (0.58±0.10), (0.38±0.12) cm and (0.43±0.07), (0.39±0.03), (0.43±0.12) cm (t=-6.89,P=0.001;t=-4.38,P=0.007;t=0.85,P=0.587) respectively. Conclusion Dual energy CT can demonstrate clearly the ligament with three-dimension display,and may provide important information for diagnosis and per-surgical evaluation.

Objective:To investigate the relationship between hyperuricemia and outcome in patients with acute ischemic stroke.Methods:Patients with acute ischemic stroke admitted to Department of Neurology, Putuo Hospital, Shanghai University of Tranditional Chinese Medicine between January 2020 and September 2020 were enrolled retrospectively. The modified Rankin Scale (mRS) score was used to evaluate the clinical outcome 3 months after the onset. ≤2 was considered as good outcome, and >2 was considered as poor outcome. The demography and baseline characteristics were compared between the good outcome group and the poor outcome group. Multivariate logistic regression analysis was used to determine the independent influencing factors of the outcome. Results:A total of 210 patients were included, their age was 69.87±62.62 years. There were 125 males (59.52%) and 85 females (40.48%). The baseline median National Institutes of Health Stroke Scale (NIHSS) score was 4. The serum uric acid level in 169 patients (80.48%) was normal and 41 (19.52%) had hyperuricemia; 120 patients (57.14%) had a good outcome, and 90 (42.86%) had a poor outcome. Blood glucose level, serum uric acid level, baseline NIHSS score and the proportions of diabetes mellitus, history of stroke or transient ischemic attack, hyperuricemia in the poor outcome group were significantly higher than those in the good outcome group (all P<0.05). Multivariate logistic regression analysis showed that diabetes mellitus (odds ratio [ OR] 2.735, 95% confidence interval [ CI] 1.461-5.121; P=0.002), hyperuricemia ( OR 2.400, 95% CI 1.102-5.228; P=0.027), and higher baseline NIHSS score ( OR 1.233, 95% CI 1.118-1.360; P<0.001) were the independent risk factors for poor outcome in patient with acute ischemic stroke. Conclusion:Hyperuricemia is an independent risk factor for poor outcome in patients with acute ischemic stroke.

Objective To provide evidence-based references for the prevention of surgical site infection(SSI)by sum-marizing the best evidence for the prevention of SSI in adult inpatients.Methods The'6S'evidence resource pyramid model was used to systematically search the related evidence in domestic and foreign databases,guideline websites,and academic socie-ty websites from the inception of the database to September 30,2023.Four researchers evaluated the quality of the included guidelines,and two researchers independently evaluated the quality of other types of literature and rated the level of evidence.Results A total of 12 articles were included,including 6 clinical decision making and 6 clinical guidelines.Thirty best items of the evidence were summarized from 7 aspects:diagnosis,clinical symptoms,influencing factors,patient prevention strategies,preventive strategies for medical staff,intraoperative and postoperative treatment,and consultation and education.Conclusion Clinical staff should develop a standardized management plan for infection prevention based on corresponding evidence to reduce the incidence of SSI instead of taking a single measurement.Moreover,they need to formulate a standardized work process for preventing SSI based on the clinical practice and patients'preference.