Degradation Mechanism and Numerical Simulation of Pervious Concrete under Salt Freezing-Thawing Cycle

In order to explore the occurrence area of pervious concrete freeze-thaw deterioration, the mass loss, strength deterioration, ultrasonic longitudinal wave velocity and dynamic elastic modulus attenuation of pervious concrete under freeze-thaw cycles were measured, and a prediction model of freeze-thaw damage was established. The mechanical properties of hardened cement pastes with the same W/C ratio under freeze-thaw cycles were also measured. Mercury intrusion porosimetry (MIP) was used to measure the pore structure characteristic parameters and pore size distribution changes of cement paste under freeze-thaw cycle, and the microstructure evolution of interfacial transition zone (ITZ) of paste and aggregate was observed by SEM scanning electron microscopy. Finally, a pervious concrete model was established by DEM to analyze the relationship between the number of freeze-thaw cycles and the mesoscopic parameters. The results indicated that the quality, strength and dynamic elastic modulus of pervious concrete deteriorate to different degrees under the conditions of water freezing and salt freezing. The damage sensitivity and strength loss of freeze-thaw damage is greater than the dynamic elastic modulus loss, which is greater than mass loss. In the pervious concrete paste which underwent 100 freeze-thaw cycles, the pore structure and macro strength had no obvious change, and hardened paste and the aggregate-interface-generated defects increased with the increase in freezing and thawing times, indicating that the deterioration of pervious concrete performance under freeze-thaw cycles was closely related to the deterioration of the interface strength of the aggregate and hardened paste. The pervious concrete model established by DEM can accurately simulate the change of the compressive modulus and the strength of pervious concrete during freeze-thaw cycles.     

新型三重抗生素糊剂对再治疗根管内粪肠球菌的抗菌效果及近期疗效

目的 观察并比较新型三重抗生素（奥硝唑、环丙沙星和米诺环素）糊剂单独及与氢氧化钙糊剂联合应用对再治疗根管内粪肠球菌的杀灭效果及近期临床疗效。方法 收集根管治疗失败病例需根管再治疗的单根管患牙149颗。随机分为5组,分别为氢氧化钙糊剂组（CH组）、传统三重抗生素（甲硝唑、环丙沙星和米诺环素）糊剂组（TAP组）、新型三重抗生素糊剂组（NTAP组）、氢氧化钙＋新型三重抗生素糊剂组（CH＋NTAP组）、樟脑酚组（CP组）。取出根管内充填物后,分别于根管预备前、根管预备后及根管封药7 d后检测根管内粪肠球菌数量,并于封药7 d后进行近期临床疗效评定。结果 各组根管预备后及根管封药7 d后根管内粪肠球菌数量均较根管预备前下降（P均<0.05）,根管封药7 d后根管内粪肠球菌数量均较根管预备后下降（P均<0.05）。根管封药7 d后CH组、TAP组、NTAP组、CH＋NTAP组根管内粪肠球菌数量均低于CP组（P均<0.05）,NTAP组和CH＋NTAP组均分别低于CH组和TAP组（P均<0.05）,TAP组低于CH组（P<0.05）。根管封药7 d后CH组、TAP组、NTAP组、CH＋NTAP组的临床疗效均优于CP组（P均<0.05）,TAP组、NTAP组及CH＋NTAP组的疗效均优于CH组（P均<0.05）,但TAP组、NTAP组及CH＋NTAP组3组间差异无统计学意义（P>0.05）。结论 氢氧化钙糊剂、三重抗生素糊剂、氢氧化钙联合三重抗生素糊剂作为根管消毒药物,均对再治疗根管内粪肠球菌有较好的抗菌效果和近期临床疗效,特别是新型三重抗生素糊剂,值得临床上推广应用。     

Bleeding complications precipitated by unrecognized Gingko biloba use after liver transplantation

Because of its neurocognitive enhancing effects, Gingko biloba has emerged as amongst the most commonly used herbal products. We report a liver transplant recipient with potentially life-threatening toxicity resulting from Gingko biloba use. Seven days after a second liver transplantation for recurrent hepatitisB virus infection, subphrenic hematoma was documented in a 59-year-old Korean patient. Failure to control bleeding with CT-guided drainage necessitated exploratory laparotomy for the evacuation of a large subphrenic hematoma. Three weeks later, an episode of vitreous hemorrhage was documented. Unbeknownst to his care providers, the patient had been consuming Gingko biloba throughout the postoperative period. No further bleeding episodes occurred after the cessation of Gingko biloba use. Unrecognized use of herbal products may be associated with serious side effects and adverse clinical sequelae in transplant recipients. Given their increasing popularity, the use of herbal products should be routinely sought as part of the history in transplant recipients.     

Does the hip powder of Rosa canina (rosehip) reduce pain in osteoarthritis patients?--a meta-analysis of randomized controlled trials

OBJECTIVE: Meta-analysis of randomized controlled trials (RCTs) - of a hip powder of Rosa canina (rosehip) preparation for symptomatic treatment of osteoarthritis (OA), in order to estimate the empirical efficacy as a pain reducing compound. METHOD: RCTs from systematic searches were included if they explicitly stated that OA patients were randomized to either rosehip or placebo. The primary outcome was reduction in pain calculated as effect size (ES), defined as the standardized mean difference (SMD). As secondary analysis the number of responders to therapy was analyzed as Odds Ratios (OR), and expressed as the Number Needed to Treat (NNT). Restricted Maximum Likelihood (REML) methods were applied for the meta-analyses using mixed effects models. RESULTS: The three studies (287 patients and a median trial-duration of 3 months) - all supported by the manufacturer (Hyben-Vital International) - showed a reduction in pain scores by rosehip powder (145 patients) compared to placebo (142 patients): ES of 0.37 [95% confidence interval (CI): 0.13-0.60], P=0.002. Test for homogeneity seemed to support that the efficacy was consistent across trials (I(2)=0%). Thus it seems reasonable to assume that the three studies were measuring the same overall effect. It seemed twice as likely that a patient allocated to rosehip powder would respond to therapy, compared to placebo (OR=2.19; P=0.0009); corresponding to a NNT of six (95% CI: 4-13) patients. CONCLUSIONS: Although based on a sparse amount of data, the results of the present meta-analysis indicate that rosehip powder does reduce pain; accordingly it may be of interest as a nutraceutical, although its efficacy and safety need evaluation and independent replication in a future large-scale/long-term trial.     

光子嫩肤技术联合胶原蛋白敷料贴在皮肤美容中的应用效果

探究将光子嫩肤技术联合胶原蛋白敷料贴应用于皮肤美容的效果。方法 选取2020年5月-2022年8月于我院行皮肤美容治疗的150例患者为研究对象,随机分为对照组和观察组,每组75例。对照组采用光子嫩肤技术治疗,观察组采用光子嫩肤技术联合胶原蛋白敷料贴治疗,比较两组临床疗效、心理状况、复发情况及不良反应发生情况。结果 观察组治疗总有效率为96.00%,高于对照组的60.00%（P＜0.05）;观察组干预后SAS评分、SDS评分均低于对照组（P＜0.05）;观察组复发率为0,低于对照组的6.67%（P ＜0.05）;两组不良反应发生率比较,差异无统计意义（P ＞0.05）。结论 光子嫩肤技术联合胶原蛋白敷料贴在皮肤美容中的应用效果确切,可提升美容效果,有效安抚患者情绪,且治疗后复发率较低,不会增加不良反应发生风险,预后理想。     

中药穴位贴敷对中风后便秘的预防效果研究

【目的】探讨中药穴位贴敷预防中风后便秘的临床效果。【方法】采用随机双盲对照的研究设计方案,将96例中风阳类证患者随机分为观察组和对照组各48例。2组患者均在中风疾病治疗的基础上进行预防便秘的常规护理,对照组给予安慰剂穴位贴敷治疗,观察组给予自制的大黄芒硝敷脐贴穴位贴敷治疗。观察2组患者便秘发生率、使用缓泻剂及不良反应情况。【结果】（1）经干预后,观察组在第7天、第14天的便秘发生率均低于对照组（P＜0.05或P＜0.01）。（2）干预后第7天和第14天,观察组的Bristol大便性状评分均较干预前显著提高（P＜0.05）,而对照组提高不明显（P＞0.05）,观察组在改善大便性状方面优于对照组（P ＜0.05）。（3）观察组使用缓泻剂的例次较对照组显著减少,差异有统计学意义（P＜0.05）。（4）对照组的不良反应发生率为6.25%,观察组为8.33%,差异无统计学意义（P＞0.05）;且所有患者的不良反应症状均较轻,未有中止治疗者。【结论】中药穴位贴敷预防中风后便秘效果好,操作简单且安全。     

氢氧化钙糊剂在年轻恒牙牙髓切断术中的应用

目的探讨氢氧化钙糊剂用于年轻恒牙牙髓切断术的临床效果。方法对2016年1月～2017年11月来我科就诊的46例患儿的外伤冠折露髓后行牙髓切断术的51颗年轻恒前牙的治疗效果进行比较分析及随访观察。结果经过1～2年的随访观察,51颗年轻外伤恒牙行牙髓切断术后,成功45颗,失败6颗,成功率为88.2%。不同治疗时间段患者治疗效果对比显示,外伤后就诊越早,露髓孔感染的机率越小,牙髓切断术的成功率就越高,其差异有统计学意义(P0.05)。伤后1～24 h治疗的43颗牙(40例)总有效率为93.0%。结论氢氧化钙糊剂具有很好的杀菌消毒作用,对组织无刺激,可诱导牙本质桥的形成,能有效地保护年轻恒牙的根髓活力,使年轻恒牙的牙根继续发育,并形成良好的根尖形态,建立正常的根尖周组织结构,是年轻恒牙牙髓切断术的首选盖髓剂。     

艾灸合暖宫贴干预寒湿凝滞型痛经的临床观察

目的探讨艾灸合暖宫贴对寒湿凝滞型痛经女大学生痛经症状、疼痛程度和睡眠质量的影响。方法选择寒湿凝滞型痛经女大学生80例,随机分为西药组和艾灸合暖宫贴组,每组40例,共观察4个月经周期。采用中医痛经症状评分、疼痛视觉模拟评分(visual analogue scale,VAS)和匹兹堡睡眠质量指数评分(Pittsburgh sleep quality index,PSQI),评定患者治疗前、第3个月经周期(治疗期间)、第4个月经周期(停止治疗)的痛经症状、疼痛程度和睡眠质量的变化情况。结果治疗后的第3个月经周期,两组的中医痛经症状评分、VAS评分和PSQI评分均较前明显下降(P<0.05)。第4个月经周期,停止治疗后,西药组的中医痛经症状评分、VAS评分较第3个月经周期上升(P<0.05),但较治疗前评分降低(P<0.05);艾灸合暖宫贴组中医痛经症状评分、VAS评分和PSQI评分与西药组比较,差异有统计学意义(P<0.01)。结论艾灸合暖宫贴可以改善寒湿凝滞型痛经女大学生的痛经症状、疼痛程度和睡眠质量,疗效具有持久性,值得推广应用。     

三色散凝胶贴膏剂的基质处方优化及其对KOA大鼠滑膜炎症的干预效应观察

目的 优化三色散凝胶贴膏剂的基质处方工艺,研究其对膝骨关节炎(KOA)大鼠滑膜炎症的干预效应.方法 以综合感官、初黏力、持黏力、剥离强度为评价指标,以聚丙烯酸钠、甘羟铝、酒石酸、甘油为考察因素,采用正交实验筛选最优基质处方.随后,将大鼠随机分为空白组、模型组、三色散凝胶贴膏剂组、三色散传统制剂组、三色散凝胶贴膏剂(含促...     

复方柴胡汤加减对大鼠酒精性肝损伤形态学和线粒体的定量研究

目的：探讨中药复方对酒精性肝损伤的防护作用。方法：形态学观察（光镜,电镜）应用MPIAS－500病理图文分析系统做线粒体定量分析（面积,周长,等效直径,平均光密度）,结果：光镜损伤组肝细胞破坏明显,呈气球样变,有酒精小体,汇管区有炎细胞浸润,而防治组与正常组相似,肝小叶排列规则,细胞体积大,分界清晰,电镜损伤组细胞不规则,胞质疏松,含大量脂滴,而防治组与正常组相似,核大而规则,含丰富的细胞器,无或少量脂滴,线粒体各指标损伤组与防治组差异显著（P＜0．01）。结论：本中药复方对酒精性肝损伤具有一定的防护作用。