彩色多普勒超声在宫颈癌诊断中的应用价值研究

目的 探讨彩色多普勒超声在宫颈癌诊断中的应用价值。方法 选择2017年1月～2019年1月我院收治的宫颈癌患者40例为宫颈癌组,选择同期收治的宫颈肌瘤患者40例为宫颈肌瘤组,选择同期收治的宫颈炎患者40例为宫颈炎组,比较各组患者的声像图表现及CDFI水平。结果 宫颈癌的声像图表现与宫颈肌瘤和宫颈炎表现不同,CDFI水平显示宫颈癌的PSV明显高于其他组,RI明显低于其他组(P0.05)。结论 彩色多普勒超声能够有效诊断宫颈癌,可作为评价宫颈癌浸润程度、指导临床分期及治疗方法选择的重要手段。彩色多普勒超声是一种有效诊断宫颈癌的方法,可清晰显示宫颈各层结构,分辨肌层浸润情况及与周围组织的关系等,并检测宫颈癌内部的血管血流动力学指标,有利于与宫颈炎及宫颈肌瘤相鉴别,可作为诊断宫颈癌及宫颈癌浸润程度、指导临床分期及选择治疗方法的一项重要检查方法。     

Color change of some aesthetic dental materials: Effect of immersion solutions and finishing of their surfaces

ObjectivesThe purpose of this research was to evaluate the color change of five aesthetic dental materials, before and after immersion in distilled water and blue food color solution for 7 and 21 days, and to study the effect of finishing the surfaces on any color change.MethodsDisc shaped samples of five types of light curing composite (A2) (n = 10 samples/composite) were prepared and all samples were light-cured with a Plasma Arc light cure unit for ten seconds. One side of each sample disc was finished and polished with a Super-Snap system all samples. After 24 h, color measurements of each sample were conducted using a digital spectrophotometer. Five sample discs from each composite group were immersed in 30 ml of food color solution for 7 and 21 days, while the remaining five sample discs were immersed in 30 ml of distilled water as a control. Color measurements were repeated for all samples at 7 and 21 days after immersion. The color changes were statistically analyzed using t-tests within the same group. A result was considered statistically significant at α = 0.05.ResultsThe color differences (ΔE) ranged from 0.4 to 4.66 and statistically significant differences on the finished and unfinished surfaces were observed after immersion in the food color solution for 7 days. No significant differences were found in any group after immersion in the food color solution for 21 days. The Tetric EvoCeram and Arabesk groups showed less color differences after 7 and 21 days than other composites.ConclusionFinished composite surfaces showed less coloration than unfinished surfaces after 7 days, but all surfaces (finished and unfinished) were highly colored for all composite types after 21 days.     

The color of touch: A case of tactile–visual synaesthesia

We report a single-case study, EB, who experiences synaesthetic sensations of color from tactile stimulation. Developmental synaesthesia is typically characterized by the consistency of synaesthetic pairings over time, in that stimuli tend to generate the same synaesthetic responses on different occasions. Here we demonstrate that EB's touch–color associations are significantly more consistent over time compared to a group of non-synaesthete controls, but that this comes in the face of surprisingly high consistency among non-synaesthetes themselves, for certain tactile stimuli. We show, too, that EB's touch–color correspondences are guided by an implicit rule system, and that this system is shared by non-synaesthetes. Both synaesthetes and non-synaesthetes are sensitive to tactile qualities such as smoothness and softness, and these qualities are systematically related to the luminance and chroma of associated colors.     

肾综合征出血热患者肾脏超声、血管性血友病因子和肝肾功能的变化及其临床意义

目的 研究肾综合征出血热(HFRS)患者肾脏彩色多普勒超声、血浆血管性血友病因子(vWF)、肝肾功能的变化及临床意义.方法 16例HFRS患者按病情分为轻、重两组,每组各8例,按病期进行肾脏二维及彩色多普勒超声检测,同时采血用酶联免疫吸附试验(ELISA)检测vWF,用自动生化仪检测血尿素氮(BUN)、肌酐(Cr)、丙氨酸氨基转移酶(ALT),用自动血细胞分析仪检测血小板参数;另取30名健康者作对照.结果 HFRS急性期左肾体积、段动脉(SRA)阻力指数(RI)及血浆vWF均显著升高,ALT、BUN也显著上升,在发热期轻、重二组相比有统计学差异(左肾体积:325.12 ±28.53v368.82 ±24.83,P＜0.05;左肾段动脉RI:0.59±0.02 v 0.66±0.03,P＜0.05;vWF:311.55 ±99.98μg/L v 356.36±54.21μg/L,P＜0.05)与BUN、ALT的变化基本一致,但血小板的变化则正相反.结论 HFRS患者肾损害各期的声像图与其临床病理变化密切相关,超声能动态观察病情各期肾损害的轻重,并能估计HFRS病情轻重,判断HFRS患者的临床治疗效果及其预后.肾脏超声检查具有准确、迅速、方便及无痛苦的优点.     

Perceived color shift of ceramics according to the change of illuminating light with spectroradiometer

PURPOSE

Perceived color of ceramics changes by the spectral power distribution of ambient light. This study aimed to quantify the amount of shifts in color and color coordinates of clinically simulated seven all-ceramics due to the switch of three ambient light sources using a human vision simulating spectroradiometer.

MATERIALS AND METHODS

CIE color coordinates, such as L*, a* and b*,of ceramic specimens were measured under three light sources, which simulate the CIE standard illuminant D65 (daylight), A (incandescent lamp), and F9 (fluorescent lamp). Shifts in color and color coordinate by the switch of lights were determined. Influence of the switched light (D65 to A, or D65 to F9), shade of veneer ceramics (A2 or A3), and brand of ceramics on the shifts was analyzed by a three-way ANOVA.

RESULTS

Shifts in color and color coordinates were influenced by three factors (P<.05). Color shifts by the switch to A were in the range of 5.9 to 7.7 ΔE*_abunits, and those by the switch to F9 were 7.7 to 10.2; all of which were unacceptable (ΔE*_ab > 5.5). When switched to A, CIE a* increased (Δa*: 5.6 to 7.6), however, CIE b* increased (Δb*: 4.9 to 7.8) when switched to F9.

CONCLUSION

Clinically simulated ceramics demonstrated clinically unacceptable color shifts according to the switches in ambient lights based on spectroradiometric readings. Therefore, shade matching and compatibility evaluation should be performed considering ambient lighting conditions and should be done under most relevant lighting condition.     

超声引导下经皮射频消融治疗黏膜下子宫肌瘤的有效性和安全性

 目的 探讨超声引导下经皮射频消融治疗黏膜下子宫肌瘤的有效性和安全性。方法 回顾性分析2016-03至2017-11收治的78例有症状的黏膜下子宫肌瘤,计算子宫肌瘤的完全消融率并评价治疗结果,比较术后3个月子宫肌瘤体积、血红蛋白(Hb)定量及子宫肌瘤症状及健康相关生活质量问卷(UFS-QOL)评分。观察和记录治疗过程中及治疗后随访期间患者出现的各种不良反应及并发症。结果 射频消融后3、6、9、12个月病灶体积缩小率分别为65.3%、75.6%、81.5%和91.6%。治疗3个月后,体积减少(35.1±9.7)cm³,血红蛋白增加(31.9±44.05 )g/L,UFS-QOL评分中SSS评分减少(24.7±13.2),HRQL评分增加(17.3±18.65),差异均有统计学意义(P＜0.01)。术后3 d检查未发现严重并发症。结论 超声引导下经皮射频消融治疗黏膜下子宫肌瘤是一种安全有效的治疗方法,适合对子宫保留有需求的患者。     

彩色多普勒血流会聚法对室间隔缺损分流程度的评估研究

本文应用彩色多普勒血流会聚法对２３例单纯室间隔缺损患者的分流程度进行评估，结果表明血流会聚法所测分而率Ｆ与频谱多普勒法所测的每搏分流量Ｑｐ－Ｑｓ及肺体循环血流量之比Ｑｐ／Ｑｓ之间均有极好的相关性（ｒ分别为０．９９和０．８７，Ｐ＜０．００１）。血流会聚区的简化指标ＮＬ×Ｒ及ＮＬ×Ｓ与Ｑｐ－Ｑｓ（ｒ＝０，９０～０．７３，Ｐ＜０．００１）及Ｑｐ／Ｑｓ（ｒ＝０．９３～０．８８，Ｐ＜０．００１）之间的相关性均很好。彩色多普勒血流会聚法能够快速、准确、无创地评估室间隔缺损的分流程度，其简化指标可以简便地对室间隔缺损的分流程度进行评估。     

视网膜中央静脉血流彩色多普勒检测

本文应用彩色多普勒血流显像（ＣＤＦＩ）对１０５例正常人２１０只眼的视网膜中央静脉（ＣＲＶ）各项血流参数进行检测。结果：各血流参数与年龄之间无密切相关性Ｐ＞０．０５，性别及眼别之间亦无显著性差异Ｐ＞０．０５，描述了正常ＣＲＶ彩色血流及血流频谱特点。ＣＲＶ血流频谱形态随视网膜中央动脉（ＣＲＡ）呈搏动性、周期性变化。认为该血管的解剖特点决定了其血流动力主要来源于ＣＲＡ血流驱使力或搏动，其它因素影响不大。这是研究ＣＲＶ血流动力学的有利条件。提出了各项指标的正常值范围。