全文获取类型
收费全文 | 523篇 |
免费 | 13篇 |
国内免费 | 7篇 |
专业分类
耳鼻咽喉 | 3篇 |
儿科学 | 20篇 |
妇产科学 | 5篇 |
基础医学 | 36篇 |
口腔科学 | 5篇 |
临床医学 | 45篇 |
内科学 | 114篇 |
皮肤病学 | 10篇 |
神经病学 | 28篇 |
特种医学 | 159篇 |
外科学 | 43篇 |
综合类 | 6篇 |
预防医学 | 14篇 |
眼科学 | 2篇 |
药学 | 25篇 |
肿瘤学 | 28篇 |
出版年
2019年 | 2篇 |
2018年 | 8篇 |
2017年 | 2篇 |
2016年 | 4篇 |
2015年 | 6篇 |
2014年 | 5篇 |
2013年 | 13篇 |
2012年 | 11篇 |
2011年 | 19篇 |
2010年 | 12篇 |
2009年 | 18篇 |
2008年 | 22篇 |
2007年 | 20篇 |
2006年 | 19篇 |
2005年 | 11篇 |
2004年 | 10篇 |
2003年 | 6篇 |
2002年 | 7篇 |
2001年 | 5篇 |
2000年 | 7篇 |
1999年 | 5篇 |
1998年 | 17篇 |
1997年 | 23篇 |
1996年 | 22篇 |
1995年 | 15篇 |
1994年 | 21篇 |
1993年 | 13篇 |
1992年 | 7篇 |
1991年 | 13篇 |
1990年 | 8篇 |
1989年 | 24篇 |
1988年 | 20篇 |
1987年 | 10篇 |
1986年 | 20篇 |
1985年 | 13篇 |
1984年 | 13篇 |
1983年 | 4篇 |
1982年 | 12篇 |
1981年 | 6篇 |
1980年 | 6篇 |
1979年 | 3篇 |
1978年 | 5篇 |
1977年 | 10篇 |
1976年 | 9篇 |
1975年 | 8篇 |
1973年 | 2篇 |
1972年 | 2篇 |
1971年 | 3篇 |
1968年 | 9篇 |
1966年 | 2篇 |
排序方式: 共有543条查询结果,搜索用时 15 毫秒
71.
72.
73.
74.
Percutaneous gastrostomy for enteral feeding 总被引:1,自引:0,他引:1
Over a period of 18 months, percutaneous nonendoscopic gastrostomy using the Seldinger technique was successfully performed in 32 adults for enteral feeding. There were no deaths or major morbidity related to the procedure. Three patients died of existing disease within 30 days; one had peritoneal irritation following dislodgement of the catheter two days after the procedure but responded to conservative treatment with antibiotics alone. The authors conclude that this procedure is simple and safe and represents the preferred method of gastrostomy for enteral feeding. 相似文献
75.
76.
77.
78.
Rotation of the distal fracture fragment in the supracondylar fracture is a contributing factor in the development of the cubitus varus deformity. Computed tomography (CT) is superior to conventional radiography in the assessment of the position of fracture fragments and was used to study 20 patients with supracondylar fractures after reduction. These fractures were followed up with radiography until healed. As determined from CT scans, rotation of the distal fracture fragment of greater than 10 degrees resulted in an abnormal Baumann angle and a cubitus varus deformity in all patients. Use of CT should facilitate the identification of this complication and thus treatment of these fractures and prevention of subsequent deformity. 相似文献
79.
vanSonnenberg E; Casola G; Zakko SF; Varney RR; Cox J; Wittich GR; Hofmann AF 《Radiology》1988,169(2):505-509
The authors describe percutaneous treatment of gallbladder or bile duct stones in 18 patients who were poor surgical candidates or in whom conventional therapy failed. Dissolution was performed in most cases with methyl tert-butyl ether (MTBE) because of its potent dissolution properties; other solvents used included monooctanoin or chelating solutions. Gallbladder stones were eliminated in 11 of 13 patients (six of seven with dissolution alone, four of four with dissolution and basket extraction, one with basket removal alone). In five patients with stones in the common bile duct (n = 3), cystic duct remnant (n = 1), and intrahepatic bile ducts (n = 1), stones were eliminated with dissolution alone in two and with dissolution plus basket extraction in one. In two patients percutaneous therapy failed due to complications (vagal hypotension with bile peritonitis and transient respiratory arrest) that occurred during catheter placement. Preliminary results suggest that MTBE is effective for dissolution of many gallbladder stones and some bile duct stones. Noncholesterol solvents and adjuvant mechanical maneuvers are valuable adjuncts to achieve complete stone elimination. 相似文献
80.
MCF-7 human breast cancer cells that were treated for one hour prior to X irradiation with the cyclic AMP-inducing agent 1-methyl-3-isobutylxanthine displayed a slight but significant increase in surviving fraction over untreated controls at each radiation dose level. This was accompanied by a two-fold increase in the level of intracellular cyclic AMP. 相似文献