全文获取类型
收费全文 | 216篇 |
免费 | 5篇 |
国内免费 | 68篇 |
专业分类
儿科学 | 6篇 |
妇产科学 | 3篇 |
基础医学 | 20篇 |
口腔科学 | 1篇 |
临床医学 | 60篇 |
内科学 | 51篇 |
皮肤病学 | 1篇 |
神经病学 | 10篇 |
特种医学 | 47篇 |
外科学 | 11篇 |
综合类 | 12篇 |
预防医学 | 4篇 |
眼科学 | 1篇 |
药学 | 51篇 |
肿瘤学 | 11篇 |
出版年
2023年 | 1篇 |
2022年 | 2篇 |
2021年 | 2篇 |
2020年 | 3篇 |
2019年 | 5篇 |
2018年 | 1篇 |
2017年 | 2篇 |
2016年 | 1篇 |
2015年 | 1篇 |
2014年 | 3篇 |
2013年 | 10篇 |
2011年 | 3篇 |
2010年 | 5篇 |
2009年 | 8篇 |
2008年 | 2篇 |
2007年 | 43篇 |
2006年 | 5篇 |
2005年 | 13篇 |
2004年 | 1篇 |
2003年 | 6篇 |
2002年 | 5篇 |
2001年 | 4篇 |
2000年 | 9篇 |
1999年 | 9篇 |
1998年 | 18篇 |
1997年 | 17篇 |
1996年 | 18篇 |
1995年 | 15篇 |
1994年 | 4篇 |
1993年 | 6篇 |
1992年 | 3篇 |
1991年 | 6篇 |
1990年 | 5篇 |
1989年 | 13篇 |
1988年 | 10篇 |
1987年 | 6篇 |
1986年 | 3篇 |
1985年 | 1篇 |
1984年 | 3篇 |
1983年 | 1篇 |
1981年 | 2篇 |
1980年 | 4篇 |
1978年 | 2篇 |
1977年 | 5篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1973年 | 1篇 |
排序方式: 共有289条查询结果,搜索用时 15 毫秒
21.
Gangrenous cholecystitis is a serious complication of acute cholecystitis and is associated with increased morbidity and mortality rates. We report a case in which the diagnosis was suggested by ultrasound, but cholecystectomy delayed due to atypical clinical presentation and a false negative radionuclide biliary scan. 相似文献
22.
Victoria KM Tay Robert Fitridge Mark LH Tie 《Journal of Medical Imaging and Radiation Oncology》2002,46(2):163-166
Demographic, clinical and laboratory data were retrospectively collected from records of 146 cases of CT fluoroscopy‐guided chemical lumbar sympathectomy for the palliation of inoperable peripheral vascular disease (PVD) between January 1997 and August 1999. Of these, 16% had claudication, 39% had rest pain and 44% had ischaemic ulcers or gangrene. Seventy‐three percent of elective cases were outpatients. At 3 months, 27 cases were lost to follow up, leaving 119 cases. Within 3 months, improvement, defined as doubling of the walking distance, cessation of rest pain or healing of ulcers, occurred in 30.3% of cases. No change was observed in 45.4% of cases and 24.3% of cases deteriorated. Patients with ulcers or gangrene had significantly poorer results than those without any ischaemic lesions, as only 19% versus 39% of patients improved (P < 0.05). The presence of hypertension, diabetes mellitus, hyperlipidaemia and smoking had no value in predicting clinical outcome (P > 0.05). There were no major complications noted. CT fluoroscopy‐guided chemical lumbar sympathectomy is safe and effective, with a complication rate of less than 1%, and efficacy of at least 30% measured within 3 months. It is a simple and minimally invasive procedure, easily performed on an outpatient basis. CT fluoroscopy‐guided chemical lumbar sympathectomy should be considered for all patients in the early stages of inoperable PVD. 相似文献
23.
24.
25.
复方葆春袋泡茶质量标准研究 总被引:3,自引:0,他引:3
目的:制订复方葆春袋泡茶质量标准。方法:双波长薄层扫描法测定了五味子乙素的量,对淫羊藿,五味子,女贞子进行了薄层色谱鉴别。结果;加样回收率平均为97.15%(RSD=1.2%,n=5),标准曲线r=0.9991,重复性RSD=1.4%(n=6)精密度RSD=2.3%(n=6),结论,方法稳定,可靠,可作为该制剂的质量控制方法之一。 相似文献
26.
0引言食管静脉曲张破裂出血是肝硬变的严重并发症之一.近年研究表明,血清LN水平与食管静脉曲张关系密切.我们分析了108例肝炎肝硬变病例,就LN水平与食管静脉曲张程度的关系做一分析.回对象和方法1.l对象选择肝炎肝硬变连续住院患者108(男gi,女17)例,年龄43.75岁士16.92岁,慢性肝炎患者62(男sl,女11)例,年龄38.20岁士13.20岁,均测定血清1。N水平,并行电子胃镜检查.诊断标准均符合1995-05月北京第五届全国传染病和寄生虫病学术会议修订的病毒性肝炎诊断标准.1.2方法采用放射免疫法测定I。N水平;用电子胃镜确定食… 相似文献
27.
Volumetric rendering techniques: applications for three-dimensional imaging of the hip 总被引:1,自引:0,他引:1
Fishman EK; Drebin B; Magid D; Scott WW Jr; Ney DR; Brooker AF Jr; Riley LH Jr; St. Ville JA; Zerhouni EA; Siegelman SS 《Radiology》1987,163(3):737-738
Volumetric rendering is a new approach to three-dimensional (3D) imaging that overcomes many of the drawbacks of currently available surface-rendering systems. Its application on the Pixar Imaging System in two cases of acetabular fracture was assessed to illustrate the features of the technique. The fast-computing architecture and large memory of this system allow rapid generation of a series of high-quality 3D images in each plane of rotation (x or spinal axis, z or somersaulting axis) that can be viewed as independent static images or as an animated real-time video loop. Editing to remove the normal contralateral hemipelvis enhances appreciation of acetabular abnormalities. Every pixel of computed tomographic data is preserved, allowing representation of both soft tissue and bone as translucent overlap. The presentation of data also allows detection of subtle abnormalities and features and minimizes the artifact generation common in surface-rendered images. 相似文献
28.
Obstetric and nonmalignant gynecologic bleeding: treatment with angiographic embolization 总被引:4,自引:0,他引:4
Eight patients (seven post partum, one post abortion) with massive pelvic hemorrhage related to pregnancy and one patient with uncontrollable bleeding following a cervical biopsy underwent angiography to facilitate the identification and treatment of bleeding sites. In all nine patients pelvic hemorrhage was successfully controlled with embolization under angiographic guidance. Angiographic embolization allowed preservation of the uterus in six patients referred prior to hysterectomy, and one patient subsequently became pregnant. When conservative measures and minor surgical repairs have failed, embolization should be the next step in the treatment of postpartum hemorrhage to avoid major surgery in an unstable patient and to maintain reproductive function. 相似文献
29.
30.