全文获取类型
收费全文 | 315篇 |
免费 | 23篇 |
国内免费 | 13篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 2篇 |
妇产科学 | 2篇 |
基础医学 | 27篇 |
口腔科学 | 8篇 |
临床医学 | 25篇 |
内科学 | 14篇 |
皮肤病学 | 3篇 |
神经病学 | 15篇 |
特种医学 | 25篇 |
外科学 | 8篇 |
综合类 | 81篇 |
预防医学 | 60篇 |
眼科学 | 8篇 |
药学 | 36篇 |
中国医学 | 29篇 |
肿瘤学 | 7篇 |
出版年
2024年 | 1篇 |
2023年 | 2篇 |
2022年 | 5篇 |
2021年 | 6篇 |
2020年 | 5篇 |
2019年 | 6篇 |
2018年 | 7篇 |
2017年 | 8篇 |
2016年 | 4篇 |
2015年 | 7篇 |
2014年 | 25篇 |
2013年 | 23篇 |
2012年 | 25篇 |
2011年 | 24篇 |
2010年 | 23篇 |
2009年 | 19篇 |
2008年 | 13篇 |
2007年 | 25篇 |
2006年 | 18篇 |
2005年 | 25篇 |
2004年 | 17篇 |
2003年 | 9篇 |
2002年 | 5篇 |
2001年 | 10篇 |
2000年 | 2篇 |
1999年 | 2篇 |
1998年 | 5篇 |
1997年 | 3篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1992年 | 3篇 |
1990年 | 1篇 |
1989年 | 6篇 |
1988年 | 3篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1984年 | 2篇 |
1983年 | 1篇 |
1981年 | 1篇 |
1978年 | 1篇 |
1976年 | 2篇 |
1969年 | 1篇 |
排序方式: 共有351条查询结果,搜索用时 15 毫秒
1.
《Diagnostic and interventional imaging》2021,102(10):641-648
PurposeTo evaluate the potential differences in non-target embolization and vessel microsphere filling of a reflux-control microcatheter (RCM) compared to a standard end-hole microcatheter (SEHM) in a swine model.Materials and methodsRadiopaque microspheres were injected with both RCM and SEHM (2.4-Fr and 2.7-Fr) in the kidneys of a preclinical swine model. Transarterial renal embolization procedures with RCM or SEHM were performed in both kidneys of 14 pigs. Renal arteries were selectively embolized with an automated injection protocol of radio-opaque microspheres. Ex-vivo X-ray microtomography images of the kidneys were utilized to evaluate the embolization by quantification of the deposition of injected microspheres in the target vs. the non-target area of injection. X-ray microtomography images were blindly analyzed by five interventional radiologists. The degree of vessel filling and the non-target embolization were quantified using a scale from 1 to 5 for each parameter. An analysis of variance was used to compare the paired scores.ResultsTotal volumes of radio-opaque microspheres injected were similar for RCM (11.5 ± 3.6 [SD] mL; range: 6–17 mL) and SEHM (10.6 ± 5.2 [SD] mL; range: 4–19 mL) (P = 0.38). The voxels enhanced ratio in the target (T) vs. non-target (NT) areas was greater with RCM (T = 98.3% vs. NT = 1.7%) than with SEHM (T = 89% vs. NT = 11%) but the difference was not significant (P = 0.30). The total score blindly given by the five interventional radiologists was significantly different between RCM (12.3 ± 2.1 [SD]; range: 6–15) and the standard catheter (11.3 ± 2.5 [SD]; range: 4–15) (P = 0.0073), with a significant decrease of non-target embolization for RCM (3.8 ± 1.3 [SD]; range: 3.5–4.2) compared to SEHM (3.2 ± 1.5 [SD]; range: 2.9–3.5) (P = 0.014).ConclusionIn an animal model, RCM microcatheters reduce the risk of non-target embolization from 11% to 1.7%, increasing the delivery of microspheres of 98% to the target vessels, compared to SEHM microcatheters. 相似文献
2.
构建数字化、可视化教学平台实现妇产科学教学手段多元化 总被引:3,自引:1,他引:2
朱丽红 《中国医学教育技术》2006,20(3):218-219
介绍了构建数字化、可视化教学平台,实现妇产科教学手段多元化的做法。内容包括多媒体课件开发制作,利用医学视听教材,建设妇产科图片数据库,建设妇产科标本库(馆),利用模型、模块进行模拟操作,加强实践技能培养和通过临床见习、实习将理论应用于实践等问题。 相似文献
3.
4.
5.
6.
R. Jiménez M. D. González M. A. Pérez J. A. García 《Ophthalmic & physiological optics》2003,23(2):97-107
The evolution of the accommodative function and development of ocular movement are evaluated in a non-clinical paediatric population (1056 subjects) aged 6-12 years, providing means for each age in the optometric tests that evaluate the accommodative amplitude, accommodative facility, accommodative response (lag), and saccadic movements. A comparison of these values between ages (anova) established three distinct trends in the behaviour of these parameters. The accommodative amplitude, measured by modified dynamic retinoscopy, and the evaluation of the saccadic movements by the development of ocular movements [developmental eye movement (DEM)] test showed continuous change with age. The values for monocular and binocular accommodative facility, measured by +/-2.00 D flippers, indicated the need to divide the population into two age groups (6-7 and 8-12 years). Finally, the means of accommodative response, measured by monocular estimation model (MEM) retinoscopy, and the direct observation of saccadic movement revealed no significant differences between ages, establishing a single mean reference value for the age group studied. 相似文献
7.
本文对腹腔境辅助阴式子宫切除术、阴式子宫切除术、腹式子宫切除术三组术式进行信床评价。每组10制,对其手术指征、腹腔镜组、腹式组以子宫肌瘤、卵巢肿瘤为主各为90%、100%,而阴式组则以子宫脱垂为主占100%(P值<O.001)。腹腔镜组还能同时行胆囊切除术占30%。所切除子宫大小阴式组小于正常子宫占90%。而腹腔境组、腹式组均超过正常子宫大小(P<0.001)。术后肠功能恢复在24h之内.腹腔镜组占100%、阴式组占80%、腹式组占20%(P<0.001)。腹腔境组术后无需用镇痛剂。术后住院日腹腔镜组平均5天乏与腹式组平均7.3天比较。P<0.001。得出腹腔镜辅助阴式子宫切除术兼阴式、腹式子宫切除术的优点。虽然出现2例非损伤性并发症.但只要仔细操作,该项手术在妇科手术领域有很大空间。 相似文献
8.
148例新生儿眼结膜炎与产妇阴道病原感染相关性的分析 总被引:1,自引:0,他引:1
目的了解自然分娩产妇产道细菌性感染(不包括衣原体)对于新生儿眼结膜炎的发病影响,加强围产期保健,防止婴幼儿视力损害。方法对148例新生儿眼结膜炎患者作结膜囊渗出物细菌培养和药敏试验,根据培养结果将患儿分为A组:培养阴性(无菌生长)组,B组:培养阳性组(有菌生长),同时相应将A组、B组患儿母亲分为产妇A组和产妇B组,作阴道分泌物涂片革兰染色检查相对照。结果产妇A组检出病原菌者5例(17.2%),清洁度正常,未检出病原菌及滴虫者24例(82.8%)。患儿B组检出淋病奈瑟氏菌13株(10.9%),其它各属菌株106株(89.1%)。产妇B组涂片见有白细胞内外革兰阴性双球菌者11例(9.2%);其它病原菌及念珠菌、滴虫感染者76例(63.9%),清洁度正常,未检出病原菌及滴虫者32例(26.9%)。产妇A组产道感染阳性率17.2%,B组阳性率73.1%,两者比较差异有极显著性(P〈0.001)。结论新生儿眼结膜炎与产妇产道感染有密切相关性,应加强对妊娠中晚期孕妇的生殖道感染防治,减少新生儿经产道感染的几率。 相似文献
9.
Baseline diastolic blood pressure measurements made on a single subject for 120 consecutive days were utilized to demonstrate the use of autocorrelation techniques for the identification of cycles of one or more periods present in the data. Provided only a single period is present, averaging techniques using this period as the base may be used to smooth the data. However, few physiological variables cycle so simply. Smoothing not only may introduce spurious cycles, but it also eliminates much non-random (and, therefore, meaningful) variance. 相似文献
10.
目的:研究8-乙酰哈巴苷在大鼠体内各组织分布及代谢情况。方法:采用高效液相色谱法测定大鼠尾静脉注射给药后不同时间点各组织及排泄物中8-乙酰哈巴苷的含量,分析药物的分布特征。结果:大鼠注射给药后,心、脾、肺、肾、子宫在给药后10 min质量浓度即达到峰值,其中肾中含量最高;肝脏在给药后30 min质量浓度达峰值;60 min后肝、肺、肾中药物均降至较低水平,心、脾、子宫中基本检测不出;8-乙酰哈巴苷注射给药后通过粪便排泄较少,大部分通过尿液排出。结论:8-乙酰哈巴苷注射途径给药主要以药物原型排出体外。 相似文献