B72 (Paraloid B-72)与微晶石蜡,作为传统的保护封护材料,一直被广泛运用于文物保护修复实践。本研究旨在探究两种封护材料的防水保护性能,以便更好地指导修复实践,同时引入电化学噪声技术,探索其在评估涂层防腐性能的能力。实验使用修...B72 (Paraloid B-72)与微晶石蜡,作为传统的保护封护材料,一直被广泛运用于文物保护修复实践。本研究旨在探究两种封护材料的防水保护性能,以便更好地指导修复实践,同时引入电化学噪声技术,探索其在评估涂层防腐性能的能力。实验使用修复实践中的方式制备涂层,并使用极化曲线、电化学阻抗谱及电化学噪声三种电化学方法,结合扫描电子显微镜,对涂层进行研究。结果表明,B72与微晶石蜡在成膜性和耐水性上各有优劣,不同的特性表明它们适合运用在不同的场合。此外电化学噪声的结果与常规电化学的测量结果有较好的一致性,而其无损、便于测量和稳定性要求低的独特优势不仅满足文物保护的原则要求,也适合金属文物腐蚀情况的现场测量与长期监测。B72 (Paraloid B-72) and microcrystalline paraffin wax, as traditional sealing materials, have been widely used in cultural relics preservation and restoration practices. The aim of this study was to investigate the waterproof preservation performance of these two sealing materials in order to better guide restoration practices, and to introduce the electrochemical noise (EN) to explore its ability in evaluating the anticorrosive performance of coatings. The coatings were prepared in the same way as in restoration practice and were investigated using three electrochemical methods, polarization curves, electrochemical impedance spectroscopy (EIS) and electrochemical noise, in conjunction with scanning electron microscopy (SEM). The results showed that B72 and microcrystalline paraffin wax had their own advantages and disadvantages in terms of film formation and waterproof performance. The different properties indicated that they were suitable for different applications. In addition, the results of electrochemical noise were in good agreements with those of conventional electrochemical measurements. Its unique advantages of non-destructive, easy to measure and low stability requirement not only satisfy the principle requirements of cultural relics preservation, but also are suitable for on-site measurements and long-term monitoring of corrosion of metal artifacts.展开更多
目的比较内镜下括约肌切开取石术(endoscopic sphincterotomy,EST)和腹腔镜胆总管探查取石术(laparscop-ic common bile duct exploration,LCBDE)在治疗肝外胆管结石中的安全性和有效性。方法回顾性分析合肥市第二人民医院2018至2022年...目的比较内镜下括约肌切开取石术(endoscopic sphincterotomy,EST)和腹腔镜胆总管探查取石术(laparscop-ic common bile duct exploration,LCBDE)在治疗肝外胆管结石中的安全性和有效性。方法回顾性分析合肥市第二人民医院2018至2022年间176例肝外胆管结石患者的临床资料,根据患者采取的治疗方式,将患者分为EST组和LCBDE组。比较两组患者基线资料及手术时间、术中出血量、住院费用和术后并发症发生率的差异。结果两组患者在年龄、性别、体重指数、ASA分级及人院主诉方面无明显差异,采用EST治疗的患者术前行MRCP进行确诊的占比例更高(69.3%对53.45%,P=0.03)。EST组患者在手术时间、术中出血量.住院天数及住院费用分别为(77.81±15.02)min.(24.95±5.64)ml.(5.32±2.29)天.(2.92±0.65)万元,LCBDE组相应为(111.17±14.40)min.(30.75±6.83)ml.(8.66±2.13)天.(3.69±1.23)万元,两组比较差异有统计学意义(P均<0.001)。EST组术后发生出血患者4例,延迟性穿孔1例,胰腺炎6例,胆管炎4例;LCBDE组患者术后发生出血2例,胰腺炎4例,胆管炎3例,胆漏3例,伤口感染3例,肺炎3例,两组比较无统计学差异(P>0.05)。两组残余结石率分别为2.3%和10.2%(P=0.029),两组患者均未发生围手术期死亡。结论EST与LCBDE在治疗肝外胆管结石中均安全有效,并发症发生情况相当,但是EST作为更微创的手术方式,不需要全身麻醉,手术时间更短,术中出血量低,患者住院时间更短,费用也更低。展开更多
文摘B72 (Paraloid B-72)与微晶石蜡,作为传统的保护封护材料,一直被广泛运用于文物保护修复实践。本研究旨在探究两种封护材料的防水保护性能,以便更好地指导修复实践,同时引入电化学噪声技术,探索其在评估涂层防腐性能的能力。实验使用修复实践中的方式制备涂层,并使用极化曲线、电化学阻抗谱及电化学噪声三种电化学方法,结合扫描电子显微镜,对涂层进行研究。结果表明,B72与微晶石蜡在成膜性和耐水性上各有优劣,不同的特性表明它们适合运用在不同的场合。此外电化学噪声的结果与常规电化学的测量结果有较好的一致性,而其无损、便于测量和稳定性要求低的独特优势不仅满足文物保护的原则要求,也适合金属文物腐蚀情况的现场测量与长期监测。B72 (Paraloid B-72) and microcrystalline paraffin wax, as traditional sealing materials, have been widely used in cultural relics preservation and restoration practices. The aim of this study was to investigate the waterproof preservation performance of these two sealing materials in order to better guide restoration practices, and to introduce the electrochemical noise (EN) to explore its ability in evaluating the anticorrosive performance of coatings. The coatings were prepared in the same way as in restoration practice and were investigated using three electrochemical methods, polarization curves, electrochemical impedance spectroscopy (EIS) and electrochemical noise, in conjunction with scanning electron microscopy (SEM). The results showed that B72 and microcrystalline paraffin wax had their own advantages and disadvantages in terms of film formation and waterproof performance. The different properties indicated that they were suitable for different applications. In addition, the results of electrochemical noise were in good agreements with those of conventional electrochemical measurements. Its unique advantages of non-destructive, easy to measure and low stability requirement not only satisfy the principle requirements of cultural relics preservation, but also are suitable for on-site measurements and long-term monitoring of corrosion of metal artifacts.
文摘目的比较内镜下括约肌切开取石术(endoscopic sphincterotomy,EST)和腹腔镜胆总管探查取石术(laparscop-ic common bile duct exploration,LCBDE)在治疗肝外胆管结石中的安全性和有效性。方法回顾性分析合肥市第二人民医院2018至2022年间176例肝外胆管结石患者的临床资料,根据患者采取的治疗方式,将患者分为EST组和LCBDE组。比较两组患者基线资料及手术时间、术中出血量、住院费用和术后并发症发生率的差异。结果两组患者在年龄、性别、体重指数、ASA分级及人院主诉方面无明显差异,采用EST治疗的患者术前行MRCP进行确诊的占比例更高(69.3%对53.45%,P=0.03)。EST组患者在手术时间、术中出血量.住院天数及住院费用分别为(77.81±15.02)min.(24.95±5.64)ml.(5.32±2.29)天.(2.92±0.65)万元,LCBDE组相应为(111.17±14.40)min.(30.75±6.83)ml.(8.66±2.13)天.(3.69±1.23)万元,两组比较差异有统计学意义(P均<0.001)。EST组术后发生出血患者4例,延迟性穿孔1例,胰腺炎6例,胆管炎4例;LCBDE组患者术后发生出血2例,胰腺炎4例,胆管炎3例,胆漏3例,伤口感染3例,肺炎3例,两组比较无统计学差异(P>0.05)。两组残余结石率分别为2.3%和10.2%(P=0.029),两组患者均未发生围手术期死亡。结论EST与LCBDE在治疗肝外胆管结石中均安全有效,并发症发生情况相当,但是EST作为更微创的手术方式,不需要全身麻醉,手术时间更短,术中出血量低,患者住院时间更短,费用也更低。
