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目的探讨在青光眼治疗中运用透明质酸钠疗效。方法选取采用小梁切除术进行治疗的74例青光眼患者,共78眼随机将本资料选取的患者分为两组,各39眼,对照组将平衡盐液注入前房内,观察组将透明质酸钠向前房内注入。结果对两组患者浅前房发生情况、术后眼压控制情况进行比较,观察组浅前房发生率明显低于对照组,眼压控制情况明显比对照组更好(P<0.05);术后观察组发生脉络膜脱离的患者仅1眼(2.56%),对照组3例(7.69%),观察组明显优于对照组(P<0.05)。结论青光眼治疗中运用透明质酸钠,能够使前房深度得到有效维持,加快术后眼压回升,并且对术后脉络膜脱离进行有效预防,避免术后早期低眼压,值得临床大力推广。 相似文献
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微生物多糖透明质酸水凝胶作为具有多样生物活性非人工合成高分子材料,因其在药物缓释、组织修复等领域的出色性能,近年已成为天然生物医用材料研究热点之一。但透明质酸水凝胶尚存在降解时间较短、力学性能不佳等缺陷,而无法实现对不同类型组织的良好修复。因此,为赋予透明质酸更优材料应用性能及生物功能,以透明质酸为原料制备具有卓越力学性能、适当降解速率的水凝胶研究具有重要理论和实践意义。本文从生物医用角度对近年采用化学交联及物理作用制备改性透明质酸水凝胶的研究进行综述,提出用于组织工程领域透明质酸水凝胶医用材料未来发展中亟待解决的问题,进而为透明质酸水凝胶应用研究提供有价值的参考。 相似文献
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组织工程的研究现状与应用展望 总被引:2,自引:0,他引:2
组织工程一词首先由Wolter于1984年提出,特指血管组织的体外构建。广义的组织工程概念是由美国国家科学基金会于1987年正式确立的,将组织工程概念定义为应用细胞生物学和工程学的原理,研究和开发、修复和改善损伤组织和功能的生物替代物的一门科学,也首次以一门新的学科的形式得到权威性的确立。组织工程学是在多学科交融渗透的基础上发展起来的组织工程学的进一步发展又对细胞生物学、分子生物学、材料学等众多学科提出了更高的要求,乃至成为带动相关学科甚至生命科学整体发展的主要动力之一。 相似文献
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生物反应器在构建组织工程产品中的应用研究 总被引:2,自引:0,他引:2
目的:通过对4种生物反应器的介绍,分析不同生物反应器在细胞培养中的作用与用途。方法:观察不同生物反应器对细胞进行培养的结果。结果:不同类型的生物反应器及其机械性能、传质以及流体剪应力等对细胞培养组织的形态和功能产生的影响不同。结论:旋转壁式生物反应器更接近于三维悬浮生长和生物体的内部环境。将来的生物反应器将是集培养、控制、研究、生产于一体的智能化系统生命机器,也是生物反应器发展的最终目标。 相似文献
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透明质酸钠在剖宫产中的应用 总被引:1,自引:0,他引:1
徐欣然 《中国城乡企业卫生》2001,(6):37-37
剖宫产术后引起组织粘连,主要包括肠管浆膜损伤相互粘连以及子宫切口部位与腹壁粘连。形成粘连后,不但影响肠蠕动功能的恢复、延长排气时间,而且由于粘连的牵拉、收缩和压迫,引起消化功能障碍,出现腹胀腹痛,同时也给再次开腹手术带来一定困难,严重影响产妇的生存质量。因此,我院自1999年4月至2000年11月,采用腹壁横切口腹膜内剖宫产术,并在术中局部使用透明质酸钠预防术后组织粘连,取得较好效果, 相似文献
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目的观察透明质酸钠凝胶在屈肌腱损伤中预防肌腱粘连的效果。方法对31例肌腱损伤修复术后患者进行鞘内或局部注射透明质酸钠凝胶预防肌腱粘连,同时配合主动康复锻炼处理。结果术后随访3个月,本组31例43条肌腱中,共随访到25例34条肌腱:依据总主动活动度(TAM)系统评定法进行疗效评价。结果为优者17条占50%,良13条占38.2%,中3条占8.8%,差1条占2.9%,总优良率达到88.2%。结论术中应用透明质酸钠凝胶具有明显的预防术后肌腱粘连的作用,对肌腱愈合无不良影响,值得临床推广应用。同时早期有计划、系统、合理的埭复治疗是必不可少的。 相似文献
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目的 评价透明质酸钠在介入性输卵管再通术中减少术后再粘连的效果.方法 将128例输卵管阻塞性不孕症患者分为2组,治疗组64例常规处理后再注入透明质酸钠注射液;对照组64例仅用常规方法处理.结果 观察组通过介入性输卵管再通,再通成功率为91.2%,对照组再通成功率为92.1%,两组比较差异无统计学意义(P<0.05).观察组介入性再通后术后3个月粘连复发率及12个月受孕率分别为4.7%和45.3%,对照组分别为26.6%和28.1%,两组比较差异有统计学意义(P<0.01,P<0.05).结论 透明质酸钠能有效减少输卵管阻塞介入性治疗术后再粘连的发生. 相似文献
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本文报道未接尘健康人、0、0~+、Ⅰ期和Ⅱ期矽肺患者血清HA测定结果,表明随着接尘情况和矽肺病情发展HA水平逐步增高,认为测定HA对矽肺的诊断和分期有一定帮助,并可作为接尘者一项辅助监测指标。 相似文献
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组织工程中天然支架材料的研究现状 总被引:2,自引:0,他引:2
合适的支架是组织工程的三大要素之一,天然的支架材料包括胶原、甲壳素、透明质酸、珊瑚、蚕丝和蜘蛛丝等,本文就这些材料的优缺点及在组织工程中的应用现状前景展开讨论. 相似文献
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关节软骨损伤后修复能力有限,组织工程为软骨疾病的治疗开辟新的途径。现从关节软骨的结构和功能、组织工程的种子细胞、支架材料、体外培养以及修复机理等方面阐述国内外在软骨组织工程领域的研究进展,并指出软骨组织工程存在和需要解决的问题。 相似文献
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The effect of ascorbic acid intake on tissue levels of ascorbic acid, dehydroascorbic acid and the ratio of dehydroascorbic acid to ascorbic acid in mice was studied. In general, the trend of changes in tissue concentrations was: ascorbic acid > dehydroascorbic acid ratio of dehydroascorbic acid to ascorbic acid. Mice fed a diet with 1% ascorbic acid had significantly higher concentration of dehydroascorbic acid in the kidney, lung and spleen than did control mice fed an ascorbic acid-free diet. Mice fed a diet with 5% ascorbic acid had elevated levels of dehydroascorbic acid in the brain, kidney, liver, lung and spleen. The kidney and lung had the greatest increase in dehydroascorbic acid concentration, suggesting that these two organs may be important sites for catabolism and elimination of ascorbic acid. In comparison with the corresponding control values, the ratio of dehydroascorbic acid to ascorbic acid was higher in the lung, not different in the liver and spleen, and lower in the kidney of mice fed a diet with 1 or 5% added ascorbic acid. These ratios were higher in the brain of mice fed a diet with 5% added ascorbic acid than in mice fed the ascorbic-acid-free diet. No apparent physiological abnormality in these animals was observed. These effects were stereospecific. Exogenous erythorbic acid, D-isoascorbic acid, a stereoisomer of ascorbic acid, increased dehydroascorbic acid equivalents (the sum of dehydroascorbic and dehydroerythorbic acid) in the kidney, lung, and spleen but the ratios of dehydroascorbic acid plus dehydroerythorbic acid to ascorbic acid plus erythorbic acid were essentially unaffected. A large glucose intake (1 or 5% in the diet) did not have an effect on levels of tissue ascorbic acid or dehydroascorbic acid. 相似文献
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Relation between degree of obesity and site-specific adipose tissue fatty acid composition in a Mediterranean population 总被引:1,自引:0,他引:1
Marta Garaulet Juan Jose Hernandez-Morante Francisco Javier Tebar Salvador Zamora 《Nutrition (Burbank, Los Angeles County, Calif.)》2011,27(2):170-176
Objective
Obesity itself could be a key factor determining fatty acid (FA) composition of adipose tissue (AT). A Mediterranean diet influences this relationship. However, a relation between different overweight and obesity levels (including morbidly obese subjects) and AT FA pattern has not been fully established. The objective of the present study was to analyze potential differences in AT FA composition attending to degree of obesity in patients who follow a Mediterranean dietary pattern.Methods
Our study comprises 60 patients classified as overweight, obese, or morbidly obese (20 subjects in each group). Dietary composition was assessed by a 7-d record, and visceral and subcutaneous AT FAs were analyzed by gas chromatography. Cardiometabolic risk-related parameters were also assessed.Results
Our results showed that dietary habits were similar among groups, although palmitic intake was higher and palmitoleic intake was lower in the morbidly obese group. Concerning AT, we observed significant differences in the visceral depot. Concretely, both total monounsaturated FA (P = 0.039) and palmitoleic acid (P = 0.008) were higher in overweight subjects. Most differences were found in the subcutaneous tissue. Among them, n-9 and total monounsaturated FA (P < 0.001) were significantly higher again in overweight subjects, while 22:6n-3 was higher in morbidly obese subjects. Subcutaneous adipose dihommo-γ-linolenic content and dietary palmitic and palmitoleic acids were independent predictors of body mass index.Conclusions
We confirm the relationship between degree of obesity and dietary and AT FA composition in this Mediterranean population. Despite a similar dietary pattern among groups, overweight and morbidly obese patients have a less detrimental FA profile than obese patients, probably due to differences in adipose tissue metabolism. 相似文献18.
Sneddon AA Rayner DV Mitchell SE Bashir S Ha JH Wahle KW Morris AC Williams LM 《Nutrients》2009,1(2):178-196
The effect of supplementation with 1% conjugated linoleic acid and 1% n-3 long chain polyunsaturated fatty acids (CLA/n-3) was assessed in rats. Food intake increased with no difference in body weights. White adipose tissue weights were reduced whereas brown adipose tissue and uncoupling protein-1 expression were increased. Plasma adiponectin, triglyceride and cholesterol levels were reduced while leptin, ghrelin and liver weight and lipid content were unchanged. Hypothalamic gene expression measurements revealed increased expression of orexigenic and decreased expression of anorexigenic signals. Thus, CLA/n-3 increases food intake without affecting body weight potentially through increasing BAT size and up-regulating UCP-1 in rats. 相似文献
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本文重点就类比和类别法在医学工程学各学科教学中的应用进行了讨论,诚望对执教于类似办学条件的同仁有所启迪。 相似文献