犬失血性休克早期血浆3种酶活性值的变化

用１０只犬复制失血性休克模型,观察休克前、休克３０ｍｉｎ及回输血后３０ｍｉｎ时,血浆中心肌相关酶—肌酸激酶（ＣＫ）、谷草转氨酶（ＧＯＴ）、α－羟丁酸脱氢酶（ＨＢＤ）活性值的变化。结果发现：失血性休克３０ｍｉｎ时,ＣＫ、ＧＯＴ较休克前显著下降（Ｐ＜０．０５,Ｐ＜０．０１）;ＨＢＤ值也下降,但无统计学意义（Ｐ＞０．０５）。输血后３０ｍｉｎ时,ＣＫ、ＧＯＴ、ＨＢＤ值回升,与休克３０ｍｉｎ时比显著升高（Ｐ＜０．０５）,与休克前比无显著性差别（Ｐ＞０．０５）。提示：失血性休克早期心肌细胞可能存在有一种保护性反应,心肌细胞没有发生明显损伤。     

冠心病病人淋巴细胞CR1表达及血清sIL—2R水平的变化

目的探讨冠心病病人外周血淋巴细胞补体Ⅰ型受体（ＣＲ１）表达及血清可溶性白细胞介素－２受体（ｓＩＬ－２Ｒ）浓度的变化。②方法采用淋巴细胞花环试验和酶联免疫吸附法（ＥＬＩＳＡ）,检测了７２例冠心病病人和６３例健康人淋巴细胞ＣＲ１花环率（Ｌ－ＣＲ１Ｒ）及血清ｓＩＬ－２Ｒ浓度变化。③结果冠心病病人Ｌ－ＣＲ１Ｒ明显降低,ｓＩＬ－２Ｒ浓度明显增高,与对照组比较差异有极显著性（ｔ＝６．４１４,７．８０６,Ｐ＜０．００１）。冠心病病人Ｌ－ＣＲ１Ｒ与ｓＩＬ－２Ｒ呈负相关（ｒ＝－０．８１５,Ｐ＜０．００１）。不稳定心绞痛（ＵＡ）、急性心肌梗死（ＡＭＩ）和陈旧性心肌梗死（ＯＭＩ）病人Ｌ－ＣＲ１Ｒ和ｓＩＬ－２Ｒ比较,差异亦具有极显著性（Ｆ＝７．８６０,１１．５７９,ｑ＝６．６２７～１０．５５０,Ｐ＜０．００１）,且以ＡＭＩ病人的变化最明显。④结论外周血淋巴细胞ＣＲ１表达和血清ｓＩＬ－２Ｒ浓度异常与冠心病病情变化有密切关系。     

再植肢不同时期侧支循环重建的影像学实验研究

目的研究大鼠再植肢不同时期主要动脉阻断后侧支循环重建的影象学表现.方法选用成年SD大鼠48只制成再植肢动物模型,每组随机选3只鼠做血管造影,分析、比较各再植肢不同时期侧支循环的影象学变化.结果 4天、1周组再植肢再植平面远、近侧无明显新生侧支血管生长.2、3周组侧支血管在再植平面近侧开始出现,自4周组起可见丰富的侧支血管通过再植平面,逐渐增多增粗增长并长向远侧.结论大鼠断肢再植术二周后再植平面侧支循环开始重建.此时,再植肢可逐渐依靠重建的侧支循环而成活.     

八氯二丙醚增强氯氰菊酯杀灭蜚蠊效果观察

目的：为寻找杀灭蜚蠊的有效制剂,制备了高效氯氟菊酯毒饵。并进行了实验室和现场杀灭蜚蠊效果的观察。方法：将氯氰菊酯可湿性粉剂与增效剂八氯二丙醚按比例混合,配以红糖、奶粉等赋形剂制成所需颗粒状毒饵。进行适口性及动物毒性试验,并与不加增效剂的毒饵进行实验室和现场的杀灭蜚蠊效果对比观察。结果：适口性试验结果表明,蜚蠊对高效氯氰菊酯毒饵24h消耗量为98mg,对混合饲料24h消耗量为8mng。动物毒性试验结果表明,该毒饵对小白鼠的LD50＞10000mg／kg。实验和现场杀灭蜚蠊结果表明,该毒饵具有击倒虫体迅速和高效、低毒的效果。投放毒饵3个月后,虫体仍保持低密度。结论：此毒饵具有高效、速杀和滞留杀灭蜚蠊的效果,完全符合实际应用要求。     

17 Beta-estradiol increases VEGF receptor-2 and promotes DNA synthesis in retinal microvascular endothelial cells.

PURPOSE: Estrogen is known to promote angiogenesis in gonads. The presence of estrogen receptors in the vascular endothelium of organs other than gonads has been reported. The goal of this study was to determine whether estrogen promotes the proliferation of retinal microvascular endothelial cells and to explore the mechanism of it. METHODS: DNA was quantitated using primary cultures of bovine retinal endothelial cells that were incubated with different doses of 17 beta-estradiol (E2), VEGF, or both. The changes in expression level of VEGF and VEGF receptor-2 (VEGFR2) were measured using northern blot analysis after treatment with E2. The presence of estrogen receptors in the endothelial cells was studied by immunohistochemistry and western blot analysis. RESULTS: 17 Beta-estradiol (E2) increased the DNA level in bovine retinal capillary endothelial cells (BRECs) by 177% at 1 nM (P < 0.05) and 150% at 10 nM (P < 0.05) by comparison with unstimulated BREC. One hundred nanomole tamoxifen completely blocked the E2-induced DNA synthesis in BRECs. Ten nanomole E2 augmented vascular endothelial growth factor (VEGF)-induced DNA synthesis in BRECs significantly (160%, P < 0.01). Ten nanomole E2 also increased VEGF mRNA expression, which peaked after 24 hours (6.7 times, P < 0.05), and VEGF receptor-2 (VEGFR2) mRNA expression, which peaked after 9 hours (2.4 times, P < 0.05). The mRNA expression level of VEGFR2 peaked with 10 nM E2 (P < 0.05) and that of VEGF reached maximum with 1 nM E2 (15 times, P < 0.001). VEGFR2 and VEGF proteins increased in parallel with their mRNA levels. Immunocytochemistry showed estrogen receptor expression in BRECs, and western blot analysis indicated the presence of a 67-kDa protein that was compatible with the estrogen receptor. CONCLUSIONS: These findings suggest that E2 may stimulate BREC growth by the receptor-mediated pathway and that E2 may augment the VEGF-dependent angiogenesis partly through the upregulation of VEGFR2.     

The on-eye dehydration of proclear compatibles lenses.

PURPOSE: The purpose of the study was to evaluate the on-eye dehydration over time, of molded omafilcon A lenses (Proclear Compatibles) compared to a range of frequent replacement lenses. METHODS: Ten subjects wore a Proclear Compatibles lens in one eye and a control lens in the other eye for 4-, 8- and 12-hours. The control lenses were Acuvue, Soflens 66 and Optima frequent replacement lenses. Each subject wore three different pairs of lenses for each time period in a masked, randomized fashion. A gravimetric technique was used to determine lens water content. RESULTS: The Proclear Compatibles lenses showed significantly less relative dehydration than the Acuvue and Soflens 66 lenses. The Acuvue and Soflens 66 lenses showed a significant increase in relative dehydration with increasing wearing time. Subjective comfort was graded higher with the Proclear Compatibles than with the Acuvue lenses. There was a significant negative correlation between Acuvue dehydration and subjective ratings of comfort. CONCLUSIONS: The study showed that Proclear Compatibles lenses dehydrate significantly less than the other frequent replacement high-water content lenses. The Acuvue and Soflens 66 lenses showed increasing dehydration during the 4-12 hour wearing period.     

基于自适应方向滤波的左心室轮廓提取

提出基于自适应方向滤波方法来提取左心室轮廓。在噪声的干扰下,引入经平滑处理的方向滤波能够得到精确的边缘,所获得的边缘方向矢量能够在边缘跟踪时对边缘走向预测,同时对参数进行自适应地调整。通过尽量少的人机交互,算法能够自动提取出左心室的轮廓。实验证明该算法增加了边缘提取的精度和一致性,同时显著地降低了计算复杂度。     

肺癌患者血清与支气管肺泡灌洗液四项放免肿瘤指标同步检测的结果分析

对３８例肺癌患者的血清和支气管肺泡灌洗液（ＢＡＬＦ）同步进行ＣＥＡ、ＣＡ－５０、ＡＦＰ、ＳＦ的检测。结果显示：肺癌ＢＡＬＦ的ＣＥＡ浓度测值７３％明显高于血清中ＣＥＡ浓度;ＣＡ－５０浓度测值６８％高于血清;ＳＦ９２％明显低于血清中测值;而ＡＦＰ在肺癌患者无论血清及灌洗液中,阳性率均低于７％,但仍是ＢＡＬＦ的浓度测值敏感于血清。提示支气管肺泡灌洗液的ＣＥＡ、ＣＡ－５０与血清的同步检测是目前肺癌早期诊断的主要优选方法之一。     

Isolated pedunculated congenital corneal dermoid

PURPOSE: To investigate a case of isolated pedunculated congenital corneal dermoid. METHODS: Case report. RESULTS: In a 14-day-old infant, the pedunculated portion of the dermoid was removed and confirmed by histopathologic examination. No surgical complication or recurrence was encountered, and the patient is waiting for a rotational autokeratoplasty. CONCLUSIONS: Prompt treatment of such an unusual tumor is important to allow for visual rehabilitation and development.