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血-房水屏障

血-房水屏障的相关文献在1991年到2020年内共计62篇,主要集中在眼科学、临床医学、基础医学 等领域,其中期刊论文61篇、会议论文1篇、专利文献248440篇;相关期刊39种,包括长江大学学报(自科版)医学卷、眼科新进展、中华实验眼科杂志等; 相关会议1种,包括2004哈尔滨白内障国际论坛等;血-房水屏障的相关文献由146位作者贡献,包括刘奕志、刘玉华、崔浩等。

血-房水屏障—发文量

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论文:61 占比:0.02%

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论文:1 占比:0.00%

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论文:248440 占比:99.98%

总计:248502篇

血-房水屏障—发文趋势图

血-房水屏障

-研究学者

  • 刘奕志
  • 刘玉华
  • 崔浩
  • 罗莉霞
  • 曹丰
  • 陈辉
  • 侯勇生
  • 傅少颖
  • 张丰菊
  • 张新愉

血-房水屏障

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    • 陈辉; 曹丰; 毛晓春
    • 摘要: 目的 使用3.0T增强MR研究兔眼虹膜周边切除术后前后房房水信号改变.方法 16只健康洁净新西兰白兔单眼接受虹膜周切术,对侧眼为对照眼,兔耳缘静脉注射0.5mol/L钆喷酸葡胺(Gd-DTPA)0.2ml/kg后,MRI连续扫描,分别测量前房、睫状体和后房的平均信号强度,绘制时间-信号增强率曲线,观察对比剂的渗透性及眼内分布.结果 双眼睫状体在静脉注射对比剂后信号迅速增强,15min后睫状体的平均信号增强率为1.09±0.058,信号增强达到最高峰,此后信号强度逐渐下降;实验过程中前房的信号缓慢增加,约50-60min到达峰值,信号增强率为0.69±0.063;手术眼后房信号增高,信号增强率为0.62±0.041,对照眼后房未见信号增强,始终为低信号.手术眼后房信号高于对照眼(P<0.05).结论 眼前、后房之间存在房水屏障,3.OT增强MR可用于检测兔眼虹膜周边切除术后对比剂在前后房的分布.%Objective To study the signal change of the anterior and posterior chamber in the rabbits after the peripheral iridectomy via 3.0 T enhanced MR.Methods Sixteen healthy clean-grade new zealand white rabbits received monocular peripheral iridectomy with the contralateral eyes being taken as control eyes.Gadolinium-diethylenetriamine pentaacetic acids (Gd-DTPA) enhanced MRI were performed with a continuous scanning protocol after injection of Gd-DTPA at a dose of 0.2 ml/kg (0.5 mol/L) through the ear vein.The signal intensities of anterior chamber, ciliary body and the posterior chamber were measured and the SER-to-time curves (signal enhancement ratio, SER) were drawn to observe the permeability and distribution of the tracer in eyes.Results The signal of ciliary body in bilateral eyes increased immediately and sharply after tracer injection, reached the peak at 15 mins and then decreased gradually over time, with the peak SER being of about 1.09 ± 0.058.The signal of anterior chamber increased slowly and reached the peak at 50~60 mins, with the maximum SER being of about 0.69±0.063.An increase of signal intensity in posterior chamber could be the experimental eyes but could not be in the control ones throughout the study.The SER in posterior chamber of the experimental eye was 0.62±0.041, which was significantly higher than that of the control eyes (P<0.05).Conclusion There is a barrier between the anterior and posterior chamber.3.0 T enhanced MR is able to detect the redistribution of contrast agents in the anterior and posterior chamber in the rabbits after the peripheral iridectomy.
    • 陈辉; 曹丰; 李广明
    • 摘要: 目的 探讨MRI检测Gd-DTPA经静脉注射后兔眼内的渗透性及其分布.方法 采用钆喷酸葡胺(Gd-DTPA)作为对比剂,活体兔耳缘静脉注射0.5 mol/L对比剂0.2 ml/kg后,1小时内每间隔10分钟行1次MRI,1小时以后间隔15分钟行1次MRI,分别测量前房、睫状体和后房的平均信号强度,绘制时间-信号增强率曲线,观察对比剂的眼内渗透性及眼内分布.结果 睫状体在静脉注射对比剂后信号迅速增强,15分钟后睫状体的平均信号增强率为(1.09±0.058),信号增强达到最高峰,此后信号强度逐渐下降.实验过程中前房的信号缓慢增加,50~60分钟到达峰值,信号增强率为(0.69±0.046);双眼后房未见信号增强,始终为低信号.结论 Gd-DTPA并不进入后房,而是经睫状体由虹膜根部直接进入前房,MRI可在活体内定量分析静脉注射Gd-DTPA后的渗透性分布.
    • 万明军; 曹丰; 陈辉; 王万笔
    • 摘要: With the increasing application of dynamic contrast-enhanced magnetic resonance imaging(MRI) and magnetization transfer contrast imaging,the application of MRI in ophthalmology has gradually increased,especially that in the intraocular anatomical structure display,MRI is significantly better than other inspection methods.At present,the research of MRI in ophthalmology is focused on the functional and metabolic imaging,which can not only accurately display the anatomical structure of the eye,but also reflect the change of the eye in the drug pharmacokinetics,blood-aqueous barrier and aqueous humor.These technologies show the advantage of no damage,real-time, repeatable and so on,therefore are ideal technologies for eye disease inspection.In the future,MRI will be used to further study the changes of blood-aqueous barrier and its pathophysiological mechanism in glaucoma and uveitis.%随着动态对比增强磁共振成像(MRI)、磁化传递对比成像等技术的广泛应用,其在眼科中的应用也逐渐增多,且MRI对眼内结构的显示明显优于其他检查手段.目前,MRI的研究热点集中在眼部疾病功能及代谢显像领域,其不仅能精确显示眼部的解剖结构,还能反映眼部药动学、血-房水屏障及房水循环等功能性变化.同时,它还具有无损伤、实时、可重复等优点,是目前眼部疾病检查较为理想的技术.未来,MRI可用于进一步研究青光眼和葡萄膜炎血-房水屏障的改变及其病理生理机制.
    • 陈辉; 毛晓春; 査云飞; 曹丰; 樊建中
    • 摘要: Objective:To investigate the Feasibility of contrast-enhanced MRI for evaluating the effects of anti-glauco-ma drugs on blood-ocular barrier.Methods:Twelve purebred New Zealand white rabbits were divided into group A and group B.Rabbits from group A were given eye drips of 1% pilocarpine while rabiits from group B were treated with eye drips of 0.25% timolol in right eyes.The left eyes of all rabbits were left untreated for control.Gadolinium-diethylenetri-aminepentaacetic acids (Gd-DTPA)enhanced MRI were performed to both eyes of these rabbits,once per 10min within the first hour and once per 15min post one hour after injection of Gd-DTPA with a dose of 0.2mL/kg (0.5mol/L)through the ear vein.The signal enhanced ratios (SER)of anterior chamber,ciliary body and the posterior chamber were measured as signal intensity of right eyes divided by signal intensity of corresponding areas of left eyes.The SER-to-time curves were drawn,in order to assess the permeabilityand distribution of the contrast agent.Results:The SER-to-time curves showed that SER in ciliary body increased dramatically and reached peaks at 15min after injection,The signal enhanced ratios (SER) was 1.09±0.058,followed by a slow decline.The SER in anterior chamber rose up a bit slowly to peaks at about 50~60min after injection,The SER was 0.98±0.063 in the anterior chamber of the right eyes,The SER was 0.59±0.046 in the anterior chamber of the left eyes,Signal enhancement of the anterior chamber were obvious in the right eyes of all rab-bits,but none signal enhancement were observed in posterior chamber.Conclusion:The path way of plasma protein entering into the anterior chamber is different from that of aqueous secretion.A barrier between the anterior and posterior chamber may exist and may be a component of blood-ocular barrier.Anti-glaucoma drugs will not damagethis barrier.%目的:探讨增强 MRI评估抗青光眼药物滴眼后对血-房水屏障影响的可行性。方法:将12只健康洁净新西兰白兔分为两组,A组采用单眼滴注1%盐酸匹鲁卡品滴眼液,B组采用单眼滴注0.25%噻吗心安滴眼液,以对侧眼作为对照。静脉注射Gd-DTPA 0.2 mL后行 MR动态增强扫描,共扫描10次(1 h内每间隔10 min行1次 MRI,1 h以后间隔15 min行1次 MRI)。测量各时间点前房、睫状体和后房的平均信号强度,绘制时间-信号增强率曲线,观察对比剂在眼内的分布情况。结果:在注射对比剂后2组中实验眼睫状体信号迅速增高,15 min后达到最高峰,信号增强率为109.0%±5.8%,此后信号强度逐渐下降;前房信号呈缓慢增高,50~60 min到达峰值,信号增强率为98.0%±6.3%,高于对照眼(59.0%±4.6%),差异有统计学意义(P<0.05);双眼后房均未见信号增强,始终为低信号。结论:血浆蛋白进入前房途径与房水分泌途径是分别独立的通道,眼的前后房之间存在着屏障,使用抗青光眼药物后并没有破坏血-房水屏障;增强MRI可用于评估眼的房水循环情况。
    • 周民稳; 王伟; 黄文彬; 陈士达; 张秀兰
    • 摘要: Background The aqueous flare is obvious in uveitic glaucomatous eye due to the damage of blood-aqueous barrier,especially following intraocular surgery.How to quantitatively determine the aqueous flare is important for us to understand the severity of inflammatory response.Objective This study was to assess inflammatory response following Ahmed glaucoma valve implantation in uveitic glaucomatous eye.Methods A nonrandomized controlled study was carried out under the approval of Ethic Committee of Zhongshan Ophthalmic Center of Sun Yat-sen University.Twenty-nine eyes of 29 subjects with refractory glaucoma were enrolled this hospital from October 2011 through July 2012.The patients were divided into the uveitic glaucoma group (10 eyes) and the other refractory glaucoma group (19 eyes) with the matched demography,and Ahmed glaucoma valve implantation was performed on all the eyes under the informed consent of each patient.The aqueous flare value was determined with FC-2000 flare-cell photometry and intraocular pressure (IOP) was measured with Goldmann tonometer before surgery and 1 day,3 days,1 week,2 weeks,1 month and 3 months after surgery.The outcomes were compared between the two groups,and the correlation of aqueous flare value with IOP was analyzed.Results In the uveitic glaucoma group,the aqueous flare values were 21.10 (10.50,38.58) photoparticles/ms,88.00 (23.55,168.63) photoparticles/ms and 29.90 (8.90,65.18)photoparticles/ms 1 day,3 days and 1 week after surgery,which were significantly higher than 13.53 (7.60,24.00) photoparticles/ms before surgery (all at P<0.01).The same trend was found in the other refractory glaucoma group.In addition,the aqueous flare value was higher in the uveitic glaucoma group than that in the other refractory glaucoma group in 3 months after surgery (q=-3.445,P<0.01).No significant differences were seen in IOP between the two groups at various time points (all at P>0.05).Also,no significant correlations were seen between IOP and aqueous flare value in all patients at various time points (preoperation:rs =0.136,P =0.481; postoperative 1 day:rs =0.019,P =0.922 ; postoperative 3 days:rs =-0.035,P =0.858 ; postoperative 1 week:rs =0.317,P=0.094; postoperative 2 weeks:rs =0.034,P =0.861 ; postoperative 1 month:rs =-0.094,P =0.628 ; postoperative 3 months:rs =0.065,P =0.738).Conclusions FC-2000 flare-cell photometry can reflect the inflammatory reaction of the anterior chamber following Ahmed glaucoma valve implantation in various types of refractory glaucomatous eyes.The postoperative inflammatory response is more serious and lasting in uveitic glaucomatous eye.%背景 葡萄膜炎继发性青光眼患者由于葡萄膜的炎症而导致血-房水屏障的破坏,局部手术的创伤刺激可加重炎症反应,对术眼前房炎症反应进行定量检测可监测眼部反应程度. 目的 探讨葡萄膜炎继发性青光眼患者行Ahmed青光眼引流阀植入术后前房内炎症反应是否重于其他类型的难治性青光眼.方法 采用前瞻性非随机对照的病例对照研究方法,于2011年10月至2012年7月纳入在中山大学中山眼科中心确诊的难治性青光眼29例29眼,分为葡萄膜炎继发性青光眼组(10眼)及其他类型的难治性青光眼组(19眼),2个组间术眼术前性别、年龄、眼压及房水闪辉值等基线特征匹配.所有患者均接受Ahmed房水引流阀植入术并随访3个月,记录术前、术后1d、3d、1周、2周、1个月和3个月术眼的眼压,同时采用FC-2000激光蛋白细胞检测仪定量测定术眼的房水闪辉值,以光粒子数/ms表示.比较2个组间房水引流阀植入术后房水闪辉值的不同,对术眼手术前后眼压值变化与房水闪辉值变化的关系进行分析. 结果 葡萄膜炎继发性青光眼组术后1d、3d和1周房水闪辉值分别为[21.10 (10.50,38.58)]、[88.00(23.55,168.63)]和[29.90(8.90,65.18)]光粒子数/ms,均明显高于术前的[13.53(7.60,24.00)]光粒子数/ms,差异均有统计学意义(均P<0.01),术后1个月和3个月房水闪辉值分别为[6.45 (4.70,13.50)]光粒子数/ms和[8.95 (6.23,18.20)]光粒子数/ms,均低于术前值,差异均有统计学意义(均P<0.01);其他类型青光眼组遵循同样的趋势.术后3个月葡萄膜炎继发性青光眼组术眼房水闪辉值明显高于其他类型青光眼组,差异有统计学意义(q=-3.445,P<0.01).术后2个组间眼压的比较差异无统计学意义(P>0.05).所有患者术眼术后眼压值均逐渐下降,术前及术后1d、3d、1周、2周、1个月和3个月术眼眼压与前房闪辉值间均无明显相关性(rs =0.136,P=0.481;rs=0.019,P=0.922;rs =-0.035,P=0.858;r,=0.317,P=0.094;rs=0.034,P=0.861;rs=-0.094,P=0.628;rs=0.065,P=0.738). 结论 FC-2000激光蛋白细胞检测仪检测证实Ahmed房水引流阀植入术可导致术眼术后早期的前房炎症反应,葡萄膜炎继发性青光眼患者术后炎症反应的恢复较缓慢,术后3个月时房水闪辉值仍高于其他类型的难治性青光眼.
    • 周民稳; 王伟; 黄文彬; 陈士达; 张秀兰
    • 摘要: 背景 葡萄膜炎继发性青光眼患者由于葡萄膜的炎症而导致血-房水屏障的破坏,局部手术的创伤刺激可加重炎症反应,对术眼前房炎症反应进行定量检测可监测眼部反应程度. 目的 探讨葡萄膜炎继发性青光眼患者行Ahmed青光眼引流阀植入术后前房内炎症反应是否重于其他类型的难治性青光眼.方法 采用前瞻性非随机对照的病例对照研究方法,于2011年10月至2012年7月纳入在中山大学中山眼科中心确诊的难治性青光眼29例29眼,分为葡萄膜炎继发性青光眼组(10眼)及其他类型的难治性青光眼组(19眼),2个组间术眼术前性别、年龄、眼压及房水闪辉值等基线特征匹配.所有患者均接受Ahmed房水引流阀植入术并随访3个月,记录术前、术后1d、3d、1周、2周、1个月和3个月术眼的眼压,同时采用FC-2000激光蛋白细胞检测仪定量测定术眼的房水闪辉值,以光粒子数/ms表示.比较2个组间房水引流阀植入术后房水闪辉值的不同,对术眼手术前后眼压值变化与房水闪辉值变化的关系进行分析. 结果 葡萄膜炎继发性青光眼组术后1d、3d和1周房水闪辉值分别为[21.10 (10.50,38.58)]、[88.00(23.55,168.63)]和[29.90(8.90,65.18)]光粒子数/ms,均明显高于术前的[13.53(7.60,24.00)]光粒子数/ms,差异均有统计学意义(均P<0.01),术后1个月和3个月房水闪辉值分别为[6.45 (4.70,13.50)]光粒子数/ms和[8.95 (6.23,18.20)]光粒子数/ms,均低于术前值,差异均有统计学意义(均P<0.01);其他类型青光眼组遵循同样的趋势.术后3个月葡萄膜炎继发性青光眼组术眼房水闪辉值明显高于其他类型青光眼组,差异有统计学意义(q=-3.445,P<0.01).术后2个组间眼压的比较差异无统计学意义(P>0.05).所有患者术眼术后眼压值均逐渐下降,术前及术后1d、3d、1周、2周、1个月和3个月术眼眼压与前房闪辉值间均无明显相关性(rs =0.136,P=0.481;rs=0.019,P=0.922;rs =-0.035,P=0.858;r,=0.317,P=0.094;rs=0.034,P=0.861;rs=-0.094,P=0.628;rs=0.065,P=0.738). 结论 FC-2000激光蛋白细胞检测仪检测证实Ahmed房水引流阀植入术可导致术眼术后早期的前房炎症反应,葡萄膜炎继发性青光眼患者术后炎症反应的恢复较缓慢,术后3个月时房水闪辉值仍高于其他类型的难治性青光眼.
    • 姜伟; 张剑; 王玉清; 齐艳秀; 宿星杰; 曹丽辉; 刘宏伟; 王冬兰
    • 摘要: 目的:观察超声乳化白内障吸除折叠式人工晶状体植入联合青光眼小梁切除术(三联手术)对血—房水屏障影响,评价三联手术安全性.方法:回顾性分析13例(13眼)年龄相关性性白内障并发急性闭角型青光眼患者,通过药物治疗眼压降至正常范围后行三联手术.结果:术前1d及术后7、30和90d房水闪辉值分别为19.808±3.456、41.153士8.418、14.844±5.107、13.942士6.875,术前1d与术后7、30和90d的房水闪辉值比较有显著性差异(P<0.05),术前1d较术后7d房水闪辉值低,但较术后30及90d房水闪辉值高;术后7d较术后30、90d的房水闪辉值高(P<0.05);术后30d与90d房水闪辉值比较无统计学差异(P>0.05).术前1d、术后7、30和90d眼压分别为(52.270士6.960)mmHg、(13.935士4.361)mmHg、(14.385士3.230)mmHg、(15.089士2.597)mmHg,各时间点眼压与房水闪辉值之间无线性相关性(P>0.05).结论:年龄相关性性白内障并发急性闭角型青光眼患者行三联手术后血—房水屏障破坏较为严重,术后积极抗炎治疗减轻手术损伤,是保证三连手术成功的关键.
    • 周洋; 景昕虹; 李效岩
    • 摘要: 目的:探讨激光蛋白细胞检测仪(laser flare cell meter,LFCM)定量测定葡萄膜炎患者房水闪辉的临床应用价值.方法:选择2009-07/2010-07在我院就诊、复查的葡萄膜炎患者129例171眼,根据其临床特点将其分为前葡萄膜炎组87例87眼,中间葡萄膜炎组10例20眼,后葡萄膜炎组32例64眼;正常对照组50例100眼.应用LFCM(FM-600型)检测各期患者房水闪辉情况,检查前所有患者均经裂隙灯显微镜检查,并进行房水闪辉分级.结果:前葡萄膜炎患者裂隙灯检查前房闪辉48眼(1+),35眼(2+),2眼(3+),2眼(4+);LFCM检测1~2级房水闪辉的平均值分别为28.6±6.7pc/ms,144.3±28.1pc/ms,3~4级房水闪辉由于背景干扰大,检测结果显示警告或无法检测;前葡萄膜炎患者1~2级房水闪辉的裂隙灯显微镜检查与LFCM测定结果呈正相关(r=0.901,P<0.01);与对照组房水闪辉值比较(5.1±1.8pc/ms),差异具有统计学意义(P<0.05).中间葡萄膜炎患者裂隙灯检查前房闪辉10眼(1+),10眼(2+),LFCM检测1~2级房水闪辉的平均值分别为31.7±5.0pc/ms,130.7±12.9pc/ms;中间葡萄膜炎患者1~2级房水闪辉的裂隙灯显微镜检查与LFCM测定结果呈正相关(r=0.867,P<0.01);与对照组房水闪辉值比较,差异具有统计学意义(P<0.05).后葡萄膜炎患者裂隙灯检查前房闪辉均为0级,LFCM检测房水闪辉的平均值为9.8±3.1pc/ms,高于对照组,差异具有统计学意义(P<0.05).结论:LFCM(FM-600型)可确切判断葡萄膜炎患者轻、中度的血-房水屏障破坏,对判断眼前段炎性反应和指导临床治疗有重要意义.
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