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《实用医药杂志(山东)》2019,(4)
<正>医源性胆管损伤是肝胆外科手术时造成的胆管损伤,尤以肝外胆道的损伤多见[1]。随着腹腔镜胆囊切除术的广泛开展,医源性胆道损伤逐渐呈上升趋势。造成医源性胆管损伤的原因很多,其中手术医师没有正确判断肝外胆道的关系,盲目操作引致占绝大多数。而术中胆道造影对于正确判断胆道解剖关系,避免胆道损伤具有非常重要的作用[2]。目前 相似文献
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目的评估吲哚菁绿15min试验在肿癌诊疗中的意义.方法对238例原发性肝癌,58例其它肿癌进行ICGR15试验.结果肝癌组ICGR15异常率117/236,非肝癌组2/58,两组比较差异显著.按Child's分级,肝癌组异常率为70/238,非肝癌组为1/58,Child's分级异常率与ICGR15异常率比较差异显著.结论ICGR15是对肿癌特别是肝癌治疗前评估肝储备功能较好的指标. 相似文献
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应用荧光谱法,研究(N-(N-(2-(4-吗啉)乙胺)-4-酰胺吖啶)-α-丙氨酸(MACA)与血清白蛋白(HSA)的相互作用,确定MACA-HSA的静态荧光猝灭机制和疏水力相互作用,系统考察MACA与HSA的结合常数、结合位点数、热力学函数,两者在不同温度下的结合常数分别为2.51×10^5(298K)、1.78×10^5(308K)、1.32×10^5(318K);结合位点数分别为1.05、1.08、1.10,MACA和HSA结合作用的ΔH和ΔS分别为-25.39kJ·mol^-1和18.20kJ·mol^-1。 相似文献
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目的观察和分析吲哚菁绿(ICG)荧光法在乳腺癌前哨淋巴结活检中的临床效果。方法 60例疑似乳腺癌患者作为研究对象,分别行美蓝染色法和吲哚菁绿荧光法检测。对比分析两种检测方法的检测结果 ,并以病理检查结果为金标准比较两种检测方法的假阴性率、准确率;平均检测用时和前哨淋巴结转移数量。结果病理检查结果显示阳性40例、阴性20例。吲哚菁绿荧光法的准确率95.00%(57/60)高于美蓝染色法的75.0%(45/60),假阴性率5.00%(2/40)低于美蓝染色法的20.00%(8/40),差异均有统计学意义(P<0.05)。吲哚菁绿荧光法的平均检测用时(11.25±1.12)min短于美蓝染色法的(17.26±1.53)min,前哨淋巴结转移数量(3.21±0.76)枚多于美蓝染色法的(1.79±0.52)枚,差异均有统计学意义(P<0.05)。结论吲哚菁绿荧光法应用于乳腺癌前哨淋巴结活检中,能降低假阴性率,提高诊断准确性,值得临床推广应用。 相似文献
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目的 探讨吲哚菁绿荧光法在胸腔镜肺减容手术中病变范围界定的可行性.方法 行胸腔镜肺减容手术患者50例,术中注射吲哚菁绿,确定肺气肿组织或巨大肺大泡位置及范围,比较术前及术后3个月PaO2、PaCO2、第1秒用力呼气量(FEV1)、每分钟最大通气量(MVV)和残气量(RV).结果 50例患者均顺利完成手术.5例患者术后有... 相似文献
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目的 探讨0.5%吲哚菁绿溶液前囊膜染色在白内障环形撕囊术中的临床应用效果.方法 60例白内障患者,随机分为两组,每组30例.观察组采用0.5%吲哚菁绿溶液前囊膜染色.采用粘弹剂下染色法,应用撕囊镊完成连续环形撕囊操作.对照组不做染色,应用撕囊镊连续环形撕囊.结果 观察组有28眼撕囊成功,成功率93.3%;对照组有20... 相似文献
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目的 评估吲哚菁绿15min试验在肿癌诊疗中的意义。方法 对238例原发性肝癌,58例其它肿癌进行ICGR15试验。结果 肝癌组ICGR15异常率117/236,非肝癌组2/58。两组比较差异显著,按Child’s分组,肝癌组异常率为70/238,非肝癌组为1/58。Child's分级异常率与ICGR15异常率比较差异显著。结论 ICGR15是对肿癌特别是肝癌治疗前评估肝储备功能较好的指标。 相似文献
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吲哚美辛合用其它药物的相互作用 总被引:1,自引:0,他引:1
吲哚美辛(消炎痛)属非甾体抗炎药,是最强的前列腺合成抑制剂之一,具有显著的抗炎及解热功效。本品口服吸收迅速,其血浆蛋白结合率为90%,主要经肝代谢,随尿、胆汁和粪便排出。目前,临床应用广泛,并常与其它药物合用。因此,必然会出现药物相互作用,现将文献已证实者分述如下。 相似文献
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基于蛋白质对花菁染料的荧光增强效应,以水溶性碳菁染料(1,1′-丙磺酸-3,3,3′,3′-四甲基吲哚三次甲基碳菁-5,5′-二磺酸钾)(STEID)为探针,建立了蛋白质荧光检测体系。考察了pH、染料浓度和离子等影响,在最优条件下,蛋白质对该碳菁染料具有明显的增强作用,荧光强度与蛋白质浓度成良好的线性关系,牛血清蛋白BSA线性响应范围为0.20~10.0μg.mL-1,检测灵敏度(3σ/K)为0.07μg.mL-1。测定了BSA血清合成样品,回收率88.5%~98.0%。 相似文献
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目的:研究不同pH条件下塞曲司特与牛血清白蛋白的相互作用机制.方法:利用荧光光谱法,并以Stern-Volmer方程确定药物与蛋白的作用类型.结果:根据Stern-Volmer方程求出了不同二者pH条件下塞曲司特与牛血清白蛋白之间的猝灭常数,并依据 Foster能量转移理论确定了生理条件下药物与蛋白的结合距离为 2.53 nm.结论:在pH 5.0和人体生理pH条件下塞曲司特对牛血清白蛋白具有荧光猝灭作用且为动态猝灭过程,在pH 8.4时塞曲司特与牛血清白蛋白之间的猝灭为静态猝灭;人体生理pH条件下塞曲司特与牛血清白蛋白之间相互作用力主要为范德华力. 相似文献
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Spectroscopic studies on the interaction between silicotungstic acid and bovine serum albumin 总被引:1,自引:0,他引:1
Wang YQ Zhang HM Zhang GC Tao WH Fei ZH Liu ZT 《Journal of pharmaceutical and biomedical analysis》2007,43(5):1869-1875
The interaction between silicotungstic acid and bovine serum albumin (BSA) was investigated using fluorescence and UV/vis. The experimental results showed that the fluorescence quenching of BSA by silicotungstic acid is a result of the formation of SiW–BSA complex; static quenching and non-radiative energy transferring were confirmed to result in the fluorescence quenching. The binding site number n, apparent binding constant KA and corresponding thermodynamic parameters were measured at different temperatures. The process of binding SiW molecule on BSA was a spontaneous molecular interaction procedure in which entropy increased and Gibbs free energy decreased. Hydrophobic interaction force plays a major role in stabilizing the complex. The effect of silicotungstic acid on the conformation of BSA was analyzed using synchronous fluorescence spectroscopy. 相似文献
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Binding interaction of indomethacin with human serum albumin 总被引:2,自引:0,他引:2
Bogdan M Pirnau A Floare C Bugeac C 《Journal of pharmaceutical and biomedical analysis》2008,47(4-5):981-984
The interaction between indomethacin and human serum albumin (HSA) was investigated by fluorescence quenching technique and UV-vis absorption spectroscopy. The results of fluorescence titration revealed that indomethacin, strongly quench the intrinsic fluorescence of HSA by static quenching and nonradiative energy transfer. The binding site number n and the apparent binding constant K(A), were calculated using linear and nonlinear fit to the experimental data. The distance r between donor (HSA) and acceptor (indomethacin) was obtained according to fluorescence resonance energy transfer (FRET). The study suggests that the donor and the acceptor are bound at different locations but within the quenching distance. 相似文献
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Tianci Xu Xingjia GuoLei Zhang Fang PanJunna Lv Yunyu ZhangHongjing Jin 《Food and chemical toxicology》2012
The interaction between olaquindox (OLA) and bovine serum albumin (BSA) was investigated using fluorescence, UV–vis absorption and circular dichroism (CD) spectroscopy. The results showed that the fluorescence quenching of BSA by OLA was a static quenching process induced by the formation of OLA–BSA complex. The binding constant of OLA–BSA complex was calculated to be 1.299 × 104 L mol−1 (293 K). The negative values of ΔH0 and ΔS0 indicated that hydrogen bond and van der Waals interactions played major roles in stabilizing the complex. Site probe competition experiments and number of binding sites (n) revealed that OLA could bind to site I in subdomain IIA of BSA, and the binding distance (r) was evaluated to be 3.643 nm according to Förster’s non-radiative energy transfer theory. The results of CD and three-dimensional fluorescence spectra suggested some conformational changes of BSA after OLA binding. 相似文献
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The interaction of gossypol with bovine serum albumin (BSA) at pH 7.6 in 0.02 M borax-borate buffer has been followed by circular dichroism (CD) and difference spectroscopy. From the extrinsic CD band at 390 nm, a binding constant of 2.7 times 103M-1was calculated. At 54° the induced CD spectrum was abolished, suggesting that the interaction is not favoured at that temperature. The effect of various solvents and salts on the interaction has been followed by difference spectroscopy. The modification of ?-amino groups of lysine did not affect the interaction. Binding of gossypol to BSA does not cause a change in its secondary structure or sedimentation coefficient. 相似文献
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目的采用荧光光谱法和紫外吸收光谱法研究曲克芦丁与牛血清白蛋白(BSA)结合反应的特征。方法将曲克芦丁对BSA内源性荧光的猝灭数据分别应用Stern-Volmer方程和Lineweaver-Burk双倒数方程计算反应的荧光猝灭常数和结合常数,应用双对数方程计算结合位点数,热力学公式计算二者结合主要作用力类型,在此基础上应用Frster非辐射能量转移理论,计算曲克芦丁与BSA相互结合时给体-受体间的距离和能量转移效率。结果结果表明曲克芦丁能够有效降低BSA的内源性荧光,其猝灭机制属于静态猝灭,二者之间的结合力为疏水作用力,二者的结合常数为106数量级,结合位点数为1,作用距离为1.97nm,能量转移效率为0.529。结论曲克芦丁可与BSA通过疏水作用结合为复合物,经静态猝灭机制引起BSA内源性荧光的猝灭。 相似文献