排序方式: 共有11条查询结果,搜索用时 15 毫秒
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目的观察光学相干断层扫描血管成像(OCTA)在中心性浆液性脉络膜视网膜病变(CSC)患者脉络膜新生血管(CNV)检测中的应用价值。方法回顾性病例观察研究。选取2018年3月至2019年3月在云南省第二人民医院诊断为慢性中心性浆液性脉络膜视网膜病变伴脉络膜新生血管患者30例(34眼)纳入研究,总结分析其OCTA与眼底彩色照相、眼底自发荧光、荧光素眼底血管造影(FFA)和OCT等传统影像学对比运用的临床体会。结果12眼FFA存在荧光素渗漏,但形态模糊,不能确定是否伴有CNV,行OCTA则可以清晰显示新生血管影像。8眼FFA未检出CNV,但OCTA清晰显示出新生血管形态。3眼眼底彩色照相及OCT检查高度怀疑CNV的存在,但因荧光素钠皮试阳性,均无法实施FFA,而OCTA则显示出病变区域血流信号,明确了CNV的存在。6眼FFA无明显荧光素渗漏,OCT示无神经上皮层脱离、无色素上皮层脱离,但OCTA提示CNV的存在。5眼通过随访过程中的病情跟踪观察,发现给予患者单一抗VEGF或PDT治疗之后视网膜下积液无明显吸收,而联合治疗后积液明显吸收。结论OCTA在CNV的检查敏感性方面优于传统的检测手段。OCTA可以作为一项安全有效的眼底影像学检查手段对慢性CSC患者的CNV进行观察,从而指导该类患者的诊断、治疗及预后分析。 相似文献
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目的评价多模式疼痛管理方案应用于肝动脉化疗栓塞术患者的效果。方法将166例肝动脉化疗栓塞术患者随机分为对照组80例和干预组86例,对照组采用传统疼痛管理策略,干预组采用多模式疼痛管理策略,包括建立医生、护士、药师及疼痛治疗师多学科团队,实施多模式镇痛知识宣教、超前非甾体抗炎药镇痛、局部浸润渗透、静脉自控镇痛泵、疼痛分级护理等措施。结果干预组术后24h内疼痛严重程度、不良反应(恶心呕吐、便秘腹胀)发生率及睡眠质量显著优于对照组(P0.05,P0.01)。结论多模式疼痛管理方案可有效控制肝动脉化疗栓塞术患者术后疼痛,有利于促进术后恢复。 相似文献
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更准确地对高分辨率可见光机场区域图像进行飞机目标的识别,提出了一种基于主成分分析(PCA-principal component analysis)和模板匹配的方法进行飞机识别。首先对图像进行均值滤波和直方图均衡化,并进行灰度直方图分析,判定图像中是否存在机场,在机场提取的基础上进行飞机图像分割,并对各个分割区域进行主成分分析,将其主轴旋转成水平方向,然后和模板库匹配,进行飞机识别。实验结果证明,该方法对飞机目标的识别是有效的。 相似文献
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【目的】探讨多模式CT在Solitaire支架取栓治疗急性缺血性卒中的影像评估价值。【方法】选择从2015年1月至2016年6月在我院临床诊断为急性缺血性卒中62例患者,在发病3~8h内行多模式CT检查,包括CT平扫(NCCT)、CT血管成像(CTA)、CT灌注成像(CTP),采用改良的血管TICI分级标准(mTICI)评估血管栓塞情况,通过CTA及CTP参数评估责任血管及血流灌注状态,初步判断患者行Solitaire支架取栓的可行性。患者行支架取栓术后24h再次行多模式CT检查评估责任血管情况,患者入院时和取栓术后72h分别进行美国国立卫生研究院神经功能缺损评分(NIHSS)评估神经功能情况。【结果】经多模式CT检查共筛选出34例患者有支架取栓适应证。行支架取栓术后复查多模式CT,血管再通成功30例(30/34),成功率88.2%。取栓治疗的34例患者中,术前CTP成像提示存在缺血半暗带(IP),表现为IP与健侧镜像区相比,脑血流量(CBF)显著降低,脑血容量(CBV)轻度降低,达峰时间(TTP)及平均通过时间(MTT)显著延长,差异有统计学意义(P<0.01);患者取栓术后责任区域相对脑血流量(rCBF)、相对脑容量(rCBV)、相对达峰时间(rTTP)、相对平均通过时间(rMTT)值与术前对比,rCBF、rCBV升高,rTTP、rMTT缩短,差异有统计学意义(P<0.01);术后72h患者NIHSS评分与入院时比较其差异有统计学意义(P<0.01)。【结论】多模式CT对急性缺血性卒中患者行Solitaire支架取栓治疗具有指导作用和重要评估价值。 相似文献
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Background:Perioperative intravenous lidocaine has been reported to have analgesic and opioid-sparing effects in many kinds of surgery. Several studies have evaluated its use in the settings of spine surgery. The aim of the study is to examine the effect of intravenous lidocaine in patients undergoing spine surgery.Methods:We performed a quantitative systematic review. Databases of PubMed, Medline, Embase database and Cochrane library were investigated for eligible literatures from their establishments to June, 2019. Articles of randomized controlled trials that compared intravenous lidocaine to a control group in patients undergoing spine surgery were included. The primary outcome was postoperative pain intensity. Secondary outcomes included postoperative opioid consumption and the length of hospital stay.Result:Four randomized controlled trials with 275 patients were included in the study. postoperative pain compared with control was reduced at 6 hours after surgery (WMD −0.50, 95%CI, −0.76 to −0.25, P < .001), at 24 hours after surgery (WMD −0.50, 95%CI, −0.70 to −0.29, P < .001) and at 48 hours after surgery (WMD −0.57, 95%CI, −0.96 to −0.17, P = .005). The effect of intravenous lidocaine on postoperative opioid consumption compared with control revealed a significant effect (WMD −15.36, 95%CI, −21.40 to −9.33 mg intravenous morphine equivalents, P < .001).Conclusion:This quantitative analysis of randomized controlled trials demonstrated that the perioperative intravenous lidocaine was effective for reducing postoperative opioid consumption and pain in patients undergoing spine surgery. The intravenous lidocaine should be considered as an effective adjunct to improve analgesic outcomes in patients undergoing spine surgery. However, the quantity of the studies was very low, more research is needed. 相似文献
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目的研究脑磁图(MEG)与颅内电极脑电图(i EEG)联合在癫痫外科治疗中的应用价值。方法应用MEG参与到将行颅内电极埋置患者的术前评估中:根据电-临床症状学、影像学、脑电图、MEG等结果设计出颅内电极埋置方案,进而行颅内电极置入并监测i EEG,捕捉发作期,最终根据定位结果行手术治疗。结果最终成功定位癫痫发作起始区并手术治疗者38例。其中证实为颞叶癫痫(TLE)的16例中,MEG与i EEG定位一致者仅6例,而颞叶以外癫痫(NTLE)22例中两者一致者达16例,两组结果有统计学差异。所有患者术后随访:EngelⅠ级28例,Ⅱ级5例,Ⅲ级3例,Ⅳ级2例。结论 MEG运用于NTLE时较TLE有着更高的与i EEG的一致率。区别于视频脑电图、MRI等其它的无创检查,MEG能够对有创的i EEG电极埋置起到额外指导作用。MEG与i EEG联合,能使电极埋置更合理精确、有针对性,能获得较高的癫痫手术疗效。 相似文献
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Ying-tao LIU Yi LI Zi-fu HUANG Zhi-jian XU Zhuo YANG Zhu-xi CHEN Kai-xian CHEN Ji-ye SHI Wei-lia ng ZHU 《Acta pharmacologica Sinica》2014,35(3):419-431
Aim: To develop a reliable computational approach for predicting potential drug targets based merely on protein sequence. Methods: With drug target and non-target datasets prepared and 3 classification algorithms (Support Vector Machine, Neural Network and Decision Tree), a multi-algorithm and multi-model based strategy was employed for constructing models to predict potential drug targets. Results: Twenty one prediction models for each of the 3 algorithms were successfully developed. Our evaluation results showed that --30% of human proteins were potential drug targets, and--40% of putative targets for the drugs undergoing phase II clinical trials were probably non-targets. A public web server named D3TPredictor (http://www.d3pharma.com/d3tpredictor) was constructed to provide easy access. Conclusion: Reliable and robust drug target prediction based on protein sequences is achieved using the multi-algorithm and multi- model strategy. 相似文献
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针对污水处理过程高度非线性及强耦合性的特点,基于多个模型的组合可以提高模型精度和鲁棒性的思想,提出了一种基于
模糊核聚类的多最小二乘支持向量机的软测量建模方法。该方法根据不同工况使用模糊核聚类算法对输入数据进行聚类划分,针对
每个聚类子集用最小二乘支持向量机方法建立子模型,最终通过子模型切换策略得到系统输出。在污水处理过程仿真平台展开验证
工作,对生化需氧量BOD的软测量进行建模,获得了良好的实验结果。 相似文献