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1.
目的制备具有表面金壳以聚乳酸羟基乙酸(PLGA)为载体包载全氟溴辛烷(PFOB)和四氧化三铁(SPIOs)的纳米粒子,用于探究其体外超声显像和磁共振成像能力和光热杀伤肿瘤细胞效果。方法采用单乳化水包油(O/W)溶剂挥发法制备PFOB-SPIOs@PLGA纳米粒子,金种子生长法形成纳米粒子表面金壳制备;对其进行表征;通过CCK-8法评估纳米粒子的细胞毒性情况;采用超声和磁共振成像仪器观察纳米粒子的体外成像效果;近红外激光照射纳米粒子溶液观测升温效果;AM单染在激光共聚焦下观察光热杀伤肿瘤细胞效果。结果成功制备了PFOB-SPIOs@PLGA@Au纳米粒子,纳米粒子平均粒径(347±65.8)nm,粒径均一,分散性好;磁共振测得r2值为(465.23±30.39)mM-1s-1,具有体外磁共振T2成像效果;具有体外超声成像效果;近红外激光照射纳米粒子溶液10min最高温度可达45.2℃;CCK-8法检测纳米粒子对各组细胞存活率无明显影响。结论成功制备了粒径均一的PFOB-SPIOs@PLGA@Au纳米粒子,该纳米粒子具有较好的超声和磁共振T2体外成像效果和体外升温效果,且无明显细胞毒性。 相似文献
2.
ObJective To evaluate the value of contrast-enhanced ultrasonography microflow imaging (MFI) in detecting prostate cancer. Methods Sixty-five patients with serum prostate-specific antigen levels higher than 4.00 μg/L were evaluated with transrectal gray-scale,power Doppler,and MFI ultrasonography and then biopsy guided by ultrasonography. Biopsy was performed at twelve sites in the base,the mid gland and the apex in each patient. In these three transverse sections, when any of the three methods showed abnormality,the biopsy site was directed to the abnormal foci. Diagnostic efficiency of the three methods for prostate cancer detection was compared based on biopsy results according to patient and biopsy site. Results Overall prostate cancers were detected in 230 (29.5 %) of 780 specimens in 36(55.4%) of 65 patients. MFI could detect more patients(34) than gray-scale(26) and power Doppler(28) (P = 0.021, P = 0.031), 6(16.7%)of the 36 patients diagnosed with cancer were identified only by MFI. By biopsy site, MFI had higher sensitivity and overall accuracy (80.0% and 83.0%) than gray-scale (47.0% and 76.8%) and power Doppler (37.4% and 74.6%) ultrasonography(P <0.001, P<0.001 ; P = 0.001, P <0.001), while the specificity of MFI was 84.4%, lower than gray-scale (89.3%) and power Doppler (90.2%) ultrasonography(P = 0.009, P < 0.001). Conclusions MFI could detect more patients and improve sensitivity and overall accuracy by biopsy site than conventional uhrasonography. 相似文献
3.
[目的]探讨静脉用药执行监控系统在静脉药物配置中心(PIVAS)与临床全程信息化管理的应用,通过静脉用药调配全程信息化闭环管理及流程优化,使静脉用药更加及时、有效、规范执行。[方法]通过静脉用药执行监控及交互系统监控静脉用药的调配、运送、执行等各环节时间,系统设置提醒临床护士执行静脉用药时间为调配后2h内,统计超过2h执行情况,分析不及时执行原因进行流程优化。[结果]通过分析不及时执行原因,从输液顺序安排、调配、运送接收、临床PDA执行方面进行了流程优化及改善。2017年6月进行流程优化后,静脉用药运送接收流程优化后比优化前平均时间减少15~20min,提高了静脉用药调配后送达病区的效率;2018年1月—2018年6月静脉用药不及时执行率比2017年1月—2017年6月下降40%,PIVAS临床满意度提高到9分,均得到改善。[结论]静脉用药执行监控系统的建立,有利于PIVAS对于静脉用药全流程质控与优化,从而更好地保证临床静脉用药及时执行,降低了静脉用药调配后在临床滞留可能造成的医院感染风险和差错风险,提高了临床静脉用药满意度,保证了病人用药安全。 相似文献
4.
目的探讨胆囊胆固醇性息肉的超声造影特征。方法对47例胆囊胆固醇性息肉患者行常规超声及超声造影检查,常规超声观察病变大小、形态、数目、内部回声、基底部宽度及彩色血流情况。超声造影观察病变模式、增强强度、病灶的始增时间、达峰时间及减退时间。结果常规超声示24例胆固醇性息肉表现为窄基底,16例表现为宽基底,7例息肉多切面扫查难以确定基底部位置,彩色多普勒测及血流信号者8例。所有息肉行超声造影均可被强化,增强模式呈蜂窝状不均匀增强者29例,均匀增强者18例,高增强40例,低增强7例。本组病例造影始增时间为(17.03±6.51)s,达峰时间为(29.27±9.71)s,减退时间为(54.42±10.37)s。超声造影均能显示病变基底部,与常规超声比较差异有统计学意义(P=0.018)。结论超声造影表现为"蜂窝状"不均匀增强对胆固醇性息肉的诊断有一定参考价值,超声造影可显著提高息肉基底部的显示率。 相似文献
5.
目的本文主要研究和探讨护理干预对放疗科头颈部肿瘤放疗患者生活质量的影响。方法将我院2017年2月份至2018年10月份收治的100例头颈部肿瘤放疗患者作为本次研究的对象,在随机原则的指导下把100例患者分为对照组和实验组,每组患者的数量为50例。对照组患者给予常规护理,实验组患者实施护理干预,对两组患者的生活质量、睡眠质量、护理满意度和护理依从性等进行对比分析。结果在生活质量、睡眠质量、护理满意度和护理依从性等方面,组间进行对比分析,实验组都明显优于对照组,P<0.05差异具有统计学意义。结论对头颈部肿瘤放疗患者实施护理干预可以让患者的生活质量、睡眠质量、护理依从性以及护理满意度等都得到显著的改善,从而让患者以一种积极、乐观的心态接受放疗,这对于放疗效果的提高具有重要的作用。总之,这一护理模式应该在临床中进行推广和使用。 相似文献
6.
目的探讨超声造影、弹性成像在浅表淋巴结良恶性诊断中的临床价值。方法对50例拟穿刺活检患者目标浅表淋巴结分别进行弹性成像和超声造影,以穿刺后病理结果为"金标准",评价两种方法判断浅表淋巴结性质的诊断准确率。结果 50例浅表淋巴结,弹性成像准确率为77.8%,高于超声造影的69.2%,差异有统计学意义(P<0.05)。结论与超声造影比较,弹性成像更有助于鉴别浅表肿大淋巴结的性质,且弹性成像价格低廉、操作简单、无创,更易被患者及临床医师接受。 相似文献
7.
目的:观察超声造影对肝转移癌的灌注过程及回声变化规律,探讨超声造影对转移性肝癌的诊断应用价值。方法:采用超声造影技术对26例共47个转移性肝癌病灶进行超声造影,分析研究其造影增强各时相的特征。结果:动脉相47个病灶均可见增强,28个(59.6%)为快速弥漫增强,15个(31.9%)为快速环状增强,4(8.5%)个较大的病灶呈缓慢不均匀轻度增强;延迟相43个病灶(91.5%)呈边界清晰的低回声,5例(10.6%)发现更多的肝内病灶。超声造影47个转移性肝癌中,43个(91.5%)表现为快进快出。结论:转移性肝癌超声造影表现的观察并且对恶性肿瘤肝转移病灶的个数、位置的确定,特别是对延迟相临床前期的微小转移灶的检出,对于恶性肿瘤病人的临床分期及其后续选择治疗方案有较高的临床意义。 相似文献
8.
目的简化高铁血红蛋白还原率测定的步骤,减少配制试剂,以及探讨影响高铁血红蛋白还原率测定的因素。方法用脱离子水代替磷酸盐缓冲液测定98例住院及门诊患者全血的高铁血红蛋白还原率。结果剔除6例无可比性的病例,2种方法所得结果差异无显著性(P>0.05)。结论可以用脱离子水代替磷酸盐缓冲液测定高铁血红蛋白还原率。 相似文献
9.
ObJective To evaluate the value of contrast-enhanced ultrasonography microflow imaging (MFI) in detecting prostate cancer. Methods Sixty-five patients with serum prostate-specific antigen levels higher than 4.00 μg/L were evaluated with transrectal gray-scale,power Doppler,and MFI ultrasonography and then biopsy guided by ultrasonography. Biopsy was performed at twelve sites in the base,the mid gland and the apex in each patient. In these three transverse sections, when any of the three methods showed abnormality,the biopsy site was directed to the abnormal foci. Diagnostic efficiency of the three methods for prostate cancer detection was compared based on biopsy results according to patient and biopsy site. Results Overall prostate cancers were detected in 230 (29.5 %) of 780 specimens in 36(55.4%) of 65 patients. MFI could detect more patients(34) than gray-scale(26) and power Doppler(28) (P = 0.021, P = 0.031), 6(16.7%)of the 36 patients diagnosed with cancer were identified only by MFI. By biopsy site, MFI had higher sensitivity and overall accuracy (80.0% and 83.0%) than gray-scale (47.0% and 76.8%) and power Doppler (37.4% and 74.6%) ultrasonography(P <0.001, P<0.001 ; P = 0.001, P <0.001), while the specificity of MFI was 84.4%, lower than gray-scale (89.3%) and power Doppler (90.2%) ultrasonography(P = 0.009, P < 0.001). Conclusions MFI could detect more patients and improve sensitivity and overall accuracy by biopsy site than conventional uhrasonography. 相似文献
10.
ObJective To evaluate the value of contrast-enhanced ultrasonography microflow imaging (MFI) in detecting prostate cancer. Methods Sixty-five patients with serum prostate-specific antigen levels higher than 4.00 μg/L were evaluated with transrectal gray-scale,power Doppler,and MFI ultrasonography and then biopsy guided by ultrasonography. Biopsy was performed at twelve sites in the base,the mid gland and the apex in each patient. In these three transverse sections, when any of the three methods showed abnormality,the biopsy site was directed to the abnormal foci. Diagnostic efficiency of the three methods for prostate cancer detection was compared based on biopsy results according to patient and biopsy site. Results Overall prostate cancers were detected in 230 (29.5 %) of 780 specimens in 36(55.4%) of 65 patients. MFI could detect more patients(34) than gray-scale(26) and power Doppler(28) (P = 0.021, P = 0.031), 6(16.7%)of the 36 patients diagnosed with cancer were identified only by MFI. By biopsy site, MFI had higher sensitivity and overall accuracy (80.0% and 83.0%) than gray-scale (47.0% and 76.8%) and power Doppler (37.4% and 74.6%) ultrasonography(P <0.001, P<0.001 ; P = 0.001, P <0.001), while the specificity of MFI was 84.4%, lower than gray-scale (89.3%) and power Doppler (90.2%) ultrasonography(P = 0.009, P < 0.001). Conclusions MFI could detect more patients and improve sensitivity and overall accuracy by biopsy site than conventional uhrasonography. 相似文献