全文获取类型
收费全文 | 1910篇 |
免费 | 205篇 |
国内免费 | 9篇 |
专业分类
耳鼻咽喉 | 21篇 |
儿科学 | 100篇 |
妇产科学 | 34篇 |
基础医学 | 247篇 |
口腔科学 | 64篇 |
临床医学 | 238篇 |
内科学 | 436篇 |
皮肤病学 | 25篇 |
神经病学 | 50篇 |
特种医学 | 253篇 |
外科学 | 208篇 |
综合类 | 84篇 |
预防医学 | 152篇 |
眼科学 | 28篇 |
药学 | 102篇 |
中国医学 | 10篇 |
肿瘤学 | 72篇 |
出版年
2022年 | 9篇 |
2021年 | 16篇 |
2020年 | 24篇 |
2019年 | 25篇 |
2018年 | 32篇 |
2017年 | 31篇 |
2016年 | 21篇 |
2015年 | 32篇 |
2014年 | 56篇 |
2013年 | 87篇 |
2012年 | 59篇 |
2011年 | 81篇 |
2010年 | 58篇 |
2009年 | 91篇 |
2008年 | 71篇 |
2007年 | 88篇 |
2006年 | 68篇 |
2005年 | 61篇 |
2004年 | 60篇 |
2003年 | 49篇 |
2002年 | 52篇 |
2001年 | 34篇 |
2000年 | 43篇 |
1999年 | 37篇 |
1998年 | 84篇 |
1997年 | 57篇 |
1996年 | 69篇 |
1995年 | 48篇 |
1994年 | 54篇 |
1993年 | 48篇 |
1992年 | 25篇 |
1991年 | 14篇 |
1990年 | 22篇 |
1989年 | 59篇 |
1988年 | 43篇 |
1987年 | 50篇 |
1986年 | 30篇 |
1985年 | 31篇 |
1984年 | 30篇 |
1983年 | 26篇 |
1982年 | 21篇 |
1981年 | 25篇 |
1980年 | 16篇 |
1979年 | 15篇 |
1978年 | 18篇 |
1977年 | 25篇 |
1976年 | 18篇 |
1975年 | 17篇 |
1974年 | 10篇 |
1973年 | 10篇 |
排序方式: 共有2124条查询结果,搜索用时 140 毫秒
1.
2.
Michael Innes 《The British journal of general practice》2002,52(479):502-502
3.
4.
T. Scholz Ø. Mathisen A. Bergan S. Osnes R. Innes T. Pedersen A. O. Aasen O. Søreide 《Transplant international》1997,10(3):180-184
We have introduced and evaluated several modifications of the conventional venovenous bypass (VVBP) in 29 adult patients
undergoing liver transplantation (OLT). A percutaneous technique for insertion of a jugular venous return cannula and a femoral
vein cannula was applied. The inferior mesenteric vein (IMV) was used for splanchnic decompression, which facilitated dissection
of the recipient liver and allowed portal anastomosis to be performed without disconnecting the portal bypass. A heat exchanger
was introduced into the bypass circuit to prevent heat loss. The percutaneous technique prevented complications related to
dissection in the axilla and groin. Hemodynamic characteristics corresponded to those found using the traditional technique.
Complications related to the VVBP were seen in only one patient in whom the femoral catheter was accidentally introduced into
the femoral artery. We conclude that percutaneous cannulas, use of the IMV for splanchnic decompression and the introduction
of a heat exchanger offer significant benefits and that they are safe and reliable.
Received: 23 August 1996 Received after revision: 14 January 1997 Accepted: 27 January 1997 相似文献
5.
This report describes the results of bone marrow leukocyte immunophenotypic studies, DNA index measurement, and chromosome analysis in a newborn with Down syndrome and transient myeloproliferative disorder. The infant's initial leukocytosis with immature cells in the peripheral blood and thrombocytopenia resolved without treatment by 6 months of age, and he was well at 2 years of age. The lack of specific reactivity between the patient's morphologically immature cells and multiple monoclonal antibodies directed against lymphoid and myeloid leukemia cells may be characteristic of this disorder. Other cases should be examined for immunophenotype to correlate the results with chromosomal analysis and to provide a basis for comparison in those who subsequently develop true acute leukemia. 相似文献
6.
目的 探讨创伤后迟发性脑肿胀的临床特点、发病机制与治疗。方法 回顾性分析1998年1月~2005年6月年收治的17例迟发性脑肿胀患者的临床特点和救治情况。结果 所有颅脑损伤患者采用保守治疗后均有好转,但于伤后5-10d出现恶化,CT复查有脑肿胀,经加强综合脱水等治疗后16例治愈,1例死亡。结论 迟发性脑肿胀好发于对冲性额、颞叶挫裂伤伴明显蛛网膜下腔出血、硬膜下薄层血肿及早期CT有脑肿胀者。其发病机制可能与创伤后的迟发性脑血管痉挛、微循环障碍、静脉回流障碍及甘露醇作用下降等因素有关。此类患者病情隐蔽性强,应加强观察、积极行CT复查,如能早期明确诊断,保守治疗多数效果良好。 相似文献
7.
Involvement of the temporal bone by lymphoreticular neoplasm is rare; all reported cases have been of secondary involvement. This article presents what we believe to be the first two reported cases of primary temporal bone lymphoma. The patients, an elderly man and a boy, both presented with infection of the ear, hearing loss, and facial nerve paresis. In both cases, facial paresis resolved after appropriate chemotherapeutic treatment. Patient presentation and clinical course are discussed in light of published work on temporal bone malignancy. Further investigation, including computed tomography and biopsy, should be considered for patients who present with an apparent middle ear infection unresponsive to medical therapy. The development of facial paralysis in such a patient warrants heightened suspicion of malignancy. 相似文献
8.
Retrorenal colon: implications for percutaneous diskectomy 总被引:1,自引:0,他引:1
It has been recommended that computed tomography (CT) with the patient prone be performed in every patient undergoing percutaneous diskectomy; this would enable detection of a retrorenal location of the colon, which could interfere with the percutaneous procedure. In this evaluation of 346 prone CT studies, only one patient (0.29%) was found to have retrorenal or retropsoas bowel that would have been perforated at diskectomy. Because of this extremely low prevalence, the performance of prone CT in every patient undergoing percutaneous lumbar diskectomy is not believed to be necessary. 相似文献
9.