小型猪急性心肌梗死后心力衰竭模型的构建

目的研究开放拉长塑料细管法（OPS）对HBV转基因小鼠（P21^HBxPHBx）和白内障小鼠（cataract mice,cM）胚胎冷冻效果。方法采用乙二醇作为冷冻保护剂,以昆明小鼠为对照,用OPS法对CM及P21^HBxPHBx两种小鼠3．5d的胚胎进行玻璃化冷冻,并比较KM、CM及P21^HBxPHBx获得胚胎数,解冻后胚胎的复苏率及发育率。结果KM、CM及P21^HBxPHBx小鼠平均获得胚胎数分别为31．12、19．32、9．14枚;解冻后的复苏率分别为95．6％、79-3％、80．3％;发育率分别为94．7％、73．8％、56．6％。表明HBV转基因小鼠的获得胚胎数明显低于昆明小鼠,解冻后三种小鼠的胚胎复苏率之间无显著差别,而解冻后发育率,P21^HBxPHBx小鼠要明显低于KM小鼠。结论转基因小鼠超排数及解冻后发育率低于昆明小鼠,而白内障模型小鼠和昆明小鼠比较不显著。     

Clinical Research on Comprehensive Treatment of Senile Vascular Dementia

Objective:To observe the curative effect of combined Chinese medicine,acupuncture and rehabilitation therapy on vascular dementia(VD),and to compare the Western medicine piracetam.Methods:Total 134 VD patients screened in reference to the standard for VD diagnosis in DSM-IV were randomly divided into a Chinese medicine plus rehabilitation group(32 cases),a Chinese medicine plus acupuncture group(33 cases),a Chinese medicine and acupuncture plus rehabilitation group(37 cases) and a Western medicine piracetam...     

空气消毒方法应用研究进展

本文概述了国内外室内空气消毒方法研究应用进展,主要包括空气消毒方法的种类、各种空气消毒方法。     

病毒性脑膜炎和病毒性脑炎患者脑脊液中一氧化氮的变化及意义

目的 探讨病毒性脑膜炎和病毒性脑炎(即病脑)患者脑脊液中一氧化氮(NO)含量改变的临床意义。方法 应用相应试剂盒对27例病脑患者和15例非感染者(对照组)脑脊液中的NO进行测定。结果 病脑患者脑脊液中治疗前NO含量与治疗后及对照组比较明显增高(P＜0．01)。结论 提示NO确实参与了病脑的病理过程，NO含量测定有助于病脑的诊断及了解病情变化。     

高氧液对单肺通气低氧血症和肺内分流的影响

目的探讨双腔支气管内麻醉时,输入高氧液对单肺通气时低氧血症和肺内分流(Qs/Qt)的影响。方法选择食管中段癌根治手术20例,随机分为两组,N组(对照组)10例单肺通气时输入平衡液;O组(高氧液组)10例单肺通气时输入高氧平衡液。分别于麻醉前、双肺通气(DLV)30min、单肺通气(OLV)30min抽取动脉血和混合静脉血做血气分析,并计算Qs/Qt等。结果OLV时O组动脉血氧饱和度(SaO2)显著高于N组(P<0.01),O组动脉血氧含量(CaO2)显著高于N组(P<0.05)。OLV时,Qs/Qt较DLV时显著增加(N组P<0.01;O组P<0.05),但两组间比较差异无显著性。结论静脉输注高氧液可以明显升高SaO2和CaO2,高氧液对Qs/Qt的影响不明显。单肺通气时输注高氧液可能对低氧血症有利。     

长春西汀治疗血管性痴呆的临床疗效观察

目的:探讨长春西汀对血管性痴呆(VD)疗效和作用机制。方法:96例VD患者随机分成长春西汀治疗组和胞二磷胆碱对照组,分别在治疗第10、21d进行简易精神状态评分(MMSE)和长谷川评分(1DS),同时测定与记忆有关的乙酰胆碱酯酶(AchE)的活性。结果:长春西汀治疗组患者第21d的MMSE和IDS评分均高于治疗前和一般治疗组(P＜0．01),且长春西汀治疗组VD患者的乙酰胆碱酯酶(AchE)活性降低和血浆乙酰胆(Ach)含量升高(P＜0．05)。结论:长春西汀治疗VD疗效肯定,其机制可能与胆碱能神经系统功能增强有关。     

细菌性痢疾诊断符合率初步研究

目的判断临床诊断细菌性痢疾患者和实际志贺菌感染的符合率,探索影响符合率的因素。方法采用整群抽样的方法,对部分临床诊断为细菌性痢疾的病例进行问卷调查并留取便标本进行志贺菌培养。结果临床诊断为细菌性痢疾的患者,仅有18．3％培养出志贺菌。便培养阳性的患者,便常规红细胞数较多,有更加明显的流行病学史和临床特征。结论临床诊断的细菌性痢疾患者中,病原学诊断符合率较低,故对患者的治疗应结合具体临床表现实施。     

组织芯片技术与人工智能神经网络在大肠肿瘤诊断中的应用

目的：构建组织原位检测指标预测诊断大肠肿瘤的人工智能神经网络（ANN）模型,探讨组织芯片技术与ANN结合应用的可行性。方法：应用组织芯片技术检测ST13等8种组织原位检测指标在大肠肿瘤演进过程各阶段的表达,同时采用ANN构建相应的诊断模型。结果：采用Matlab6．5软件中提供的Kruskal-wal-lis H秩和检验函数,对这8种指标在正常大肠组织、大肠腺瘤和大肠癌组织中的阳性表达差异进行统计学检验,其中ST13、Bcl-2、Survivin和HSFlm RNA的表达,差异有统计学意义,P〈0．01;将8种指标随机组合,分别构建相应的ANN诊断模型,评价其各自的诊断效率,发现ST13、Bcl-2、Survivin与HSFl mRNA组合的ANN-BP模型预测准确率最高,其对正常大肠组织、大肠腺瘤和大肠癌训练集的预测准确率分别高达92.895％、94.163％和92.013％,对该ANN-BP网络诊断模型的盲法测试结果也分别高达85.714％、79.412％和72％。结论：组织芯片技术与ANN相结合,可以大大提高组织原位检测指标对大肠肿瘤的预测诊断效率。     

Optimizing Parametric Factors in CIELAB and CIEDE2000 Color-Difference Formulas for 3D-Printed Spherical Objects

The current color-difference formulas were developed based on 2D samples and there is no standard guidance for the color-difference evaluation of 3D objects. The aim of this study was to test and optimize the CIELAB and CIEDE2000 color-difference formulas by using 42 pairs of 3D-printed spherical samples in Experiment I and 40 sample pairs in Experiment II. Fifteen human observers with normal color vision were invited to attend the visual experiments under simulated D65 illumination and assess the color differences of the 82 pairs of 3D spherical samples using the gray-scale method. The performances of the CIELAB and CIEDE2000 formulas were quantified by the STRESS index and F-test with respect to the collected visual results and three different optimization methods were performed on the original color-difference formulas by using the data from the 42 sample pairs in Experiment I. It was found that the optimum parametric factors for CIELAB were kL = 1.4 and kC = 1.9, whereas for CIEDE2000, kL = 1.5. The visual data of the 40 sample pairs in Experiment II were used to test the performance of the optimized formulas and the STRESS values obtained for CIELAB/CIEDE2000 were 32.8/32.9 for the original formulas and 25.3/25.4 for the optimized formulas. The F-test results indicated that a significant improvement was achieved using the proposed optimization of the parametric factors applied to both color-difference formulas for 3D-printed spherical samples.