Aluminum potassium sulfate and tannic acid sclerotherapy for Goligher Grades Ⅱ and Ⅲ hemorrhoids: Results from a multicenter study

AIM: To show that aluminum potassium sulfate and tannic acid(ALTA) sclerotherapy has a high success rate for Grade Ⅱ and Ⅲ hemorrhoids.METHODS: This study was based on the clinical data of 604 patients with hemorrhoids who underwent ALTA sclerotherapy between January 2009 and February 2015. The objective of this study was to assess the efficacy of this treatment for Grades Ⅱ and Ⅲ hemorrhoids. Preoperative and postoperative symptoms, complications and success rate were all assessed retrospectively. Follow-up consisted of a simple questionnaire, physical examination and an anoscopy. Patients were followed-up at one day, one week, two weeks, one month, one year, two years, three years, four years and five years after the ALTA sclerotherapy.RESULTS: One hundred and sixty-nine patients were diagnosed with Grade Ⅱ hemorrhoids and 435 patients were diagnosed with Grade Ⅲ hemorrhoids. The one year, three year and five year cumulative success rates of ALTA sclerotherapy for Grades Ⅱ and Ⅲ hemo-rrhoids were 95.9% and 93.1%; 89.3% and 83.7%; and 89.3% and 78.2%, respectively. No significant differences were observed in the cumulative success rates after ALTA sclerotherapy between Grades Ⅱ and Ⅲ hemorrhoids(P = 0.09). There were forty-seven post-operative complications(low grade fever; anal pain; urinary retention; rectal ulcer; and others). No serious or life-threatening complications occurred and all cases improved through conservative treatment. At univariate analysis there were no predictive factors of failure.CONCLUSION: ALTA sclerotherapy has had a high success rate for Grade Ⅱ and Ⅲ hemorrhoids during five years of post-operative treatment. However, additional studies are needed to evaluate the efficacy of this ALTA sclerotherapy in the management of hemorrhoidal disease.

Liver injury after aluminum potassium sulfate and tannic acid treatment of hemorrhoids

We are reporting a rare case of acute liver injury that developed after an internal hemorrhoid treatment with the aluminum potassium sulfate and tannic acid(ALTA) regimen. A 41-year-old man developed a fever and liver injury after undergoing internal hemorrhoid treatment with a submucosal injection of ALTA with lidocaine. The acute liver injury was classified clinically as hepatocellular and pathologically as cholestastic. We could not classify the mechanism of injury. High eosinophil and immunoglobulin E levels characterized the injury,and a drug lymphocyte stimulation test was negative on postoperative day 25. Fluid replacement for two weeks after hospitalization improved the liver injury. ALTA therapy involves injecting chemicals into the submucosa,from the rectum to the anus,and this is the first description of a case that developed a severe liver disorder after this treatment; hence,an analysis of future cases as they accumulate is desirable.

热分解法综合利用明矾石工艺研究

提出了热分解法综合利用明矾石新工艺 :采用高温快速脱水、分解处理明矾石矿 ,既提高了明矾石的分解率 ,又保证了氧化铝的活性 ;采用“酸熔法”分离铝硅 ,既保证了氧化铝浸出率 ,又有效地解决了设备的腐蚀问题。实验结果表明 ,明矾石矿在 90 0℃下 ,焙烧 2 0min后 ,再经湿法加工 ,氧化钾和氧化铝的浸出率均能达到 95

乙酰水杨酸合成方法改进

以水杨酸和乙酸酐为原料,以弱酸硫酸铝钾作催化剂可以方便的合成乙酰水杨酸,实验结果表明:反应温度、反应时间、催化剂用量、水杨酸与乙酸酐的比例等因素均有影响,最佳反应条件是:催化剂的用量为0.6g,n(水杨酸)n(乙酸酐)=1.0 2.0,恒温70℃,反应时间为30min,在优化的反应条件下,乙酰水杨酸的产率为77.8%。结果还表明,硫酸铝钾作为催化剂产率高于浓硫酸作催化剂的产率,而且产品色泽为白色,且纯度高。

氢氧化钾法与硫酸法制备硫酸铝钾的区别探讨

研究了氢氧化钾和硫酸溶解铝箔制备十二水合硫酸铝钾的区别,通过返滴定法测定制备过程中各阶段的铝含量,深入分析了实验过程中的相关物料守恒,发现氢氧化钾法在铝箔溶解阶段由于副反应形成Al(OH)3沉淀,导致最终产率很低,进行搅拌及降低体系浓度可很大程度上提高产率,不过仍低于硫酸法。此外,硫酸法在实验操作上也相对更简捷。因此推荐学生使用硫酸法来制备十二水合硫酸铝钾。

铬酸钡沉淀分离硫酸亚铁铵滴定法测定硅铝钙钡合金中钡

试样溶解后,以Ca-EDTA溶液掩蔽铁、铝等干扰离子,在pH值5.5～5.9的乙酸-乙酸钠缓冲溶液介质中,加重铬酸钾溶液使钡生成铬酸钡沉淀,过滤使钡与钙、铁、铝等干扰离子分离。用盐酸溶解铬酸钡沉淀,在硫磷混酸介质中,以N-苯代邻氨基苯甲酸为指示剂,用硫酸亚铁铵标准溶液滴定至试样由紫红色转变为浅黄棕色为终点,根据所消耗的硫酸亚铁铵标准溶液的体积,计算钡的百分含量。

煤矸石酸浸液亚铁氰化钾深度脱铁实验研究

以煤矸石酸浸液经初步脱铁反应后的溶液为研究对象,通过对其组分含量的分析,结果表明:100g煤矸石经初步脱铁后,酸浸液中Al2O3,Fe2O3质量分别为32.50,0.21g,其中铁质量没有达到制备无铁级硫酸铝的要求。因此,本研究取初步脱铁反应后的溶液500mL,通过添加除铁剂亚铁氰化钾进行深度脱铁,系统研究了反应温度、反应时间和亚铁氰化钾加量对脱铁的影响,以溶液中Fe2O3的最终质量为指标来考察各因素对除铁效果的影响,确定最优的工艺条件。研究结果表明:反应温度为20℃,反应时间为0.5h,亚铁氰化钾加量为1.79g时,除铁率达到97.46%,此时溶液的铁质量是达到制备无铁级硫酸铝的要求,研究成果具有较好的应用前景。