全文获取类型
收费全文 | 75篇 |
免费 | 7篇 |
国内免费 | 1篇 |
专业分类
基础医学 | 1篇 |
临床医学 | 48篇 |
外科学 | 2篇 |
综合类 | 17篇 |
预防医学 | 10篇 |
药学 | 2篇 |
肿瘤学 | 3篇 |
出版年
2023年 | 3篇 |
2022年 | 2篇 |
2021年 | 7篇 |
2020年 | 5篇 |
2019年 | 5篇 |
2018年 | 1篇 |
2017年 | 2篇 |
2016年 | 1篇 |
2015年 | 2篇 |
2014年 | 1篇 |
2013年 | 2篇 |
2012年 | 4篇 |
2011年 | 5篇 |
2010年 | 4篇 |
2009年 | 7篇 |
2008年 | 6篇 |
2007年 | 6篇 |
2006年 | 4篇 |
2005年 | 2篇 |
2003年 | 1篇 |
2001年 | 2篇 |
2000年 | 4篇 |
1998年 | 1篇 |
1997年 | 2篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1992年 | 1篇 |
1990年 | 1篇 |
排序方式: 共有83条查询结果,搜索用时 15 毫秒
1.
患者女,34岁。因妊娠24周,不规律持续腹痛20h急诊入院。产科检查:宫高20cm,腹围94cm,胎心152次/min,节律规整,宫缩(+),不规律胎动(+),胎膜未破。超声所见:胎儿双顶径6.0cm,胎心率155次/min,腹围:18cm,股骨长径3.8cm,各脏器发育正常,胎动频繁; 相似文献
2.
目的比较双氧水与声诺维三维输卵管超声造影(3D-Hy Co Sy)对输卵管通畅度的诊断价值。方法回顾分析我院经阴道超声引导下行输卵管造影检查的24例不孕症患者(共47条输卵管)的影像资料,所有病例均行双氧水造影和3D-Hy Co Sy。3D-Hy Co Sy检查前行子宫输卵管碘油造影(HSG),以HSG检查结果作为评估输卵管通畅度的金标准,对比两种超声造影诊断输卵管通畅度的优缺点。结果 1与HSG诊断结果比较,3D-Hy Co Sy对输卵管通畅度的诊断符合率为80.9%,双氧水造影对输卵管通畅度的诊断符合率为59.6%,差异有统计学意义(P﹤0.05)。3D-Hy Co Sy的假阳性率为5.3%,低于双氧水造影(47.4%);3D-Hy Co Sy的假阴性率为14.3%,高于双氧水造影(3.6%)。23D-Hy Co Sy判断近端输卵管狭窄及梗阻部位结果与HSG高度一致(Kappa值分别为0.77、0.90),双氧水造影为基本一致(Kappa值分别为0.40、0.45)。3D-Hy Co Sy判断中远端输卵管狭窄及梗阻部位结果与HSG高度一致(Kappa值分别为0.70、0.80),双氧水造影与HSG一致性差(Kappa值分别为0.31、0.31)。结论双氧水造影与3D-Hy Co Sy检查安全无创、操作简便,但双氧水造影较3D-Hy Co Sy假阴性率低,3D-Hy Co Sy可更清晰地显示输卵管立体形态结构,准确评估输卵管的通畅度及确定梗阻部位;两者结合有望提高输卵管超声造影的诊断准确率。 相似文献
3.
4.
我们总结了一套新方法 ,使操作过程简单化、准确化 ,以提高导管的成功率。1 资料与方法在 1997年 4月~ 1999年 12月间我们研究了 2 6例有配偶的不孕症患者 ,并且通过腹腔镜 ,X线引导下及彩色超声引导下输卵管造影术 ,已经明确了不孕症的病因及输卵管的解剖结构。导管装置包括一根 5F ,2 9cm长的外导管和一根 3F ,尖端为 2F的内导管及一根直径 0 0 18inch的导丝。彩色超声仪为美国GE公司生产的LOGIQ 40 0MD ,配以频率为 5MHz的阴式探头。术前给患者适量的镇静剂和镇痛药。首先 ,消毒阴道及宫颈 ,把 5F外导管在直视… 相似文献
5.
心脏彩色多普勒超声心动图监测右胸小切口房缺封堵术与右心导管房缺封堵术对比研究 总被引:1,自引:0,他引:1
目的探讨评价右胸小切口房缺封堵术与右心导管房缺封堵术的优缺点。
方法43例房间隔缺损(ASD)患者中,21例行介入手术ASD封堵术,22例行右胸小切口ASD封堵术。介入手术ASD封堵术是在大型数字减影血管造影机(DSA)下进行,经胸超声心动图监测封堵器的位置,观察有无残余分流,是否影响二尖瓣及主动脉瓣的功能。右胸小切口ASD封堵术是在手术室进行,无体外循环,完全由超声心动图监测整个过程。
结果21例行介入手术ASD封堵术者成功19例,22例行右胸小切口ASD封堵术全部封堵成功,其中包括腔静脉型房缺3例。
结论房间隔缺损封堵术有2种方式,一是右胸小切口经超声心动图全过程指导放置封堵器,二是经右心导管在DSA下放置ASD封堵器。两者比较介入疗法放置封堵器对患者创伤小,但对30mm以上大房缺及腔静脉型房缺封堵器放置不易成功。而外科微创手术对这些难治型ASD封堵更有优势。 相似文献
6.
超声引导下射频治疗子宫肌瘤是近年来发展起来的一种微创技术,我院自2002年行超声引导下射频治疗子宫肌交加患者328例,现总结如下。 相似文献
7.
本文报道29例门静脉海绵状变性简称CTPV病人彩色Doppler超声(简称彩超)的检查结果,目的是检验被kauzlaric等称为CTPV超声诊断“三联征”的实用价值。 相似文献
8.
超声造影在肾透明细胞癌检出和诊断中的应用 总被引:8,自引:0,他引:8
董晓秋 《中华医学杂志(英文版)》2009,122(10):1179-1183
Background Renal clear cell carcinoma (RCCC) is the most common malignant renal tumor. It is highly malignant, does not cause clinical symptoms in its early stages, and cannot be diagnosed using conventional ultrasound. This study was aimed to investigate the contrast-enhanced ultrasound (CEUS) mode and characteristics of the time-intensity curve for RCCC and its pathological basis.
Methods Forty-two patients with pathologically diagnosed RCCC underwent CEUS examination before surgery. The patients' kidneys were visualized after injection of contrast agents using the Technos MPX DU8. We analyzed the CEUS mode, time-intensity curve, and pathological findings.
Results The detection rate of RCCC with conventional ultrasound was about 71%, while the rate using CEUS was 100%. Larger tumors (33 cases) showed non-uniform enhancement with defective filling. CEUS modes were divided into 4 types: type Ⅰ, "quick in and out" (26.19%, 11/42); type Ⅱ, "quick in and slow out" (40.48%, 17/42); type Ⅲ, "Simultaneous in and out" (16.67%, 7/42); and type Ⅳ "slow in and out" (16.67%, 7/42). All types had a close correlation to the pathological basis. Time-intensity curve of CEUS consisted of 3 phases, the perfusion phase, regression phase, and lag phase. Cases of types Ⅰ and Ⅲ only had a perfusion and regression phase, those of type Ⅱ and Ⅳ had a perfusion phase, regression phase, and lag phase. Quantitative analysis of the time-intensity curve showed that the time-to-peak (FTP) of the lesions was shorter than that of normal renal parenchyma (P 〈0.0001), the mean value of the up slope rate of the absolute value of lesions was higher than that of the ipsilateral normal renal parenchyma (P 〈0.0001), and that the mean value of descent slope rate of the absolute value of lesions was lower than that of the ipsilateral normal renal parenchyma (P 〈0.0001).
Conclusions CEUS is useful in detecting small vessels in tumors. Although there are several different CEUS modes, type Ⅰ "quick in and out" and type Ⅱ "quick in and slow out" accounted for the most cases that had a close correlation to pathologic angiogenesis. Time-intensity curves also showed some special characteristics. These data could provide valuable information for the clinical diagnosis of RCCC. 相似文献
Methods Forty-two patients with pathologically diagnosed RCCC underwent CEUS examination before surgery. The patients' kidneys were visualized after injection of contrast agents using the Technos MPX DU8. We analyzed the CEUS mode, time-intensity curve, and pathological findings.
Results The detection rate of RCCC with conventional ultrasound was about 71%, while the rate using CEUS was 100%. Larger tumors (33 cases) showed non-uniform enhancement with defective filling. CEUS modes were divided into 4 types: type Ⅰ, "quick in and out" (26.19%, 11/42); type Ⅱ, "quick in and slow out" (40.48%, 17/42); type Ⅲ, "Simultaneous in and out" (16.67%, 7/42); and type Ⅳ "slow in and out" (16.67%, 7/42). All types had a close correlation to the pathological basis. Time-intensity curve of CEUS consisted of 3 phases, the perfusion phase, regression phase, and lag phase. Cases of types Ⅰ and Ⅲ only had a perfusion and regression phase, those of type Ⅱ and Ⅳ had a perfusion phase, regression phase, and lag phase. Quantitative analysis of the time-intensity curve showed that the time-to-peak (FTP) of the lesions was shorter than that of normal renal parenchyma (P 〈0.0001), the mean value of the up slope rate of the absolute value of lesions was higher than that of the ipsilateral normal renal parenchyma (P 〈0.0001), and that the mean value of descent slope rate of the absolute value of lesions was lower than that of the ipsilateral normal renal parenchyma (P 〈0.0001).
Conclusions CEUS is useful in detecting small vessels in tumors. Although there are several different CEUS modes, type Ⅰ "quick in and out" and type Ⅱ "quick in and slow out" accounted for the most cases that had a close correlation to pathologic angiogenesis. Time-intensity curves also showed some special characteristics. These data could provide valuable information for the clinical diagnosis of RCCC. 相似文献
9.
后3个月梗死周边心肌应变率明显增加及梗死面积明显减少(P<0.01),术后6个月梗死周边心肌应变率明显增加梗死面积明显减少(P<0.01).结论 SRI可以无创定量评价冠状动脉支架置入术后左室局部功能的变化. 相似文献