全文获取类型
收费全文 | 166568篇 |
免费 | 31651篇 |
国内免费 | 2424篇 |
专业分类
耳鼻咽喉 | 6100篇 |
儿科学 | 5850篇 |
妇产科学 | 3533篇 |
基础医学 | 5026篇 |
口腔科学 | 1569篇 |
临床医学 | 27431篇 |
内科学 | 50638篇 |
皮肤病学 | 7591篇 |
神经病学 | 16500篇 |
特种医学 | 6638篇 |
外科学 | 41859篇 |
综合类 | 262篇 |
现状与发展 | 72篇 |
一般理论 | 1篇 |
预防医学 | 8134篇 |
眼科学 | 3870篇 |
药学 | 3368篇 |
中国医学 | 45篇 |
肿瘤学 | 12156篇 |
出版年
2024年 | 697篇 |
2023年 | 4853篇 |
2022年 | 1329篇 |
2021年 | 3348篇 |
2020年 | 6150篇 |
2019年 | 2396篇 |
2018年 | 7895篇 |
2017年 | 7678篇 |
2016年 | 8778篇 |
2015年 | 8706篇 |
2014年 | 16022篇 |
2013年 | 16477篇 |
2012年 | 6434篇 |
2011年 | 6704篇 |
2010年 | 10980篇 |
2009年 | 14486篇 |
2008年 | 6542篇 |
2007年 | 5127篇 |
2006年 | 7647篇 |
2005年 | 4888篇 |
2004年 | 4243篇 |
2003年 | 3223篇 |
2002年 | 3069篇 |
2001年 | 4235篇 |
2000年 | 3480篇 |
1999年 | 3481篇 |
1998年 | 3729篇 |
1997年 | 3478篇 |
1996年 | 3376篇 |
1995年 | 3220篇 |
1994年 | 1947篇 |
1993年 | 1567篇 |
1992年 | 1379篇 |
1991年 | 1415篇 |
1990年 | 1080篇 |
1989年 | 1179篇 |
1988年 | 1029篇 |
1987年 | 865篇 |
1986年 | 900篇 |
1985年 | 735篇 |
1984年 | 559篇 |
1983年 | 537篇 |
1982年 | 537篇 |
1981年 | 435篇 |
1980年 | 380篇 |
1979年 | 332篇 |
1978年 | 352篇 |
1977年 | 413篇 |
1975年 | 296篇 |
1972年 | 309篇 |
排序方式: 共有10000条查询结果,搜索用时 14 毫秒
41.
42.
43.
44.
45.
Background contextLarge, prominent osteophytes along the anterior aspect of the cervical spine have been reported as a cause of dysphagia. Improvement of swallowing after surgical resection has been reported in a few case reports with short-term follow-up. The current report describes outcomes of a series of five patients with surgical treatment for this rare disorder, with a long-term follow-up.PurposeTo study the clinical and radiographic outcomes of a case series of patients surgically treated for dysphagia secondary to cervical diffuse idiopathic skeletal hyperostosis (DISH).Study designRetrospective review of a case series.Patient sampleFive cases from a University Hospital.Outcome measuresClinical and imagenological follow-up.MethodsThe records of five patients with dysphagia who had undergone anterior surgical resection of prominent osteophytes secondary to DISH were reviewed. Extrinsic esophageal compression secondary to anterior cervical osteophytes was radiographically confirmed via preoperative barium esophagogram swallowing study. All patients underwent anterior cervical osteophytes resection without fusion. Postoperatively, patients were followed-up clinically and radiographically with routine lateral cervical radiographs.ResultsPreoperative esophagogram showed that the esophageal obstruction was present at one level in three cases and two levels in two cases. The C3–C4 level was involved in three cases, C4–C5 in three cases, and C5–C6 in one case. There were no postoperative complications, including recurrent laryngeal nerve palsy, wound infection, or hematomas. All patients had resolution of dyphagia soon after surgery (within 2 weeks). Postoperative radiographs demonstrated complete removal of osteophytes. At final follow-up, ranging from 1 to 9 years (average 59.8 months, median 53 months), no patients reported recurrence of dysphagia. Final radiographic examination demonstrated minimal regrowth of the osteophytes.ConclusionsAlthough rarely indicated, surgical resection of anterior cervical osteophytes from DISH causing dyphagia produces good clinical and radiographical outcomes. After thorough evaluation to rule out other intrinsic or extrinsic causes of swallowing difficulty, surgical treatment of this uncommon condition might be considered. 相似文献
46.
47.
48.
49.
50.
Kamil Torres Anna Torres Grzegorz J. Staśkiewicz Andrzej Chrościcki Tadeusz Łoś Ryszard Maciejewski 《Surgical endoscopy》2009,23(9):2117-2123
Background Surgical procedures enhance production of pro- and anti-inflammatory cytokines and angiogenic factors that play a pivotal
role in the immunological response to surgical trauma and take part in the pathogenesis of tumor growth and adhesions formation.
The purpose of the study was to access the influence of low-pressure CO2 pneumoperitoneum on the inflammatory and angiogenic responses during the postoperative period after laparoscopy.
Methods The study group consisted of 40 patients, operated on due to cholelithiasis using standard-pressure (n = 20) and low-pressure (n = 20) CO2 pneumoperitoneum. Serum concentration of interleukin (IL)-6, IL-8, IL-10, vascular endothelial growth factor (VEGF)-A, and
endostatin were measured before and at 6, 24, and 48 h after surgery with commercially available enzyme-linked immunosorbent
assay (ELISA).
Results Concentrations of IL-6 increased significantly after the operations in both groups. No differences were observed between the
groups in regards to IL-6, IL-8, and IL-10 levels. Concentrations of VEGF-A measured at 6 and 48 h were significantly lower
in patients who underwent laparoscopies performed with low-pressure pneumoperitoneum. No significant variations were observed
in endostatin serum concentration. Concentrations of the studied parameters were not influenced by duration of surgery or
by age, gender, or body mass index (BMI) of the patients.
Conclusions The results obtained in our study do not show any significant differences between studied operative procedures with regards
to systemic inflammatory response. Changes in the concentrations of VEGF-A and endostatin observed in the studied population
may suggest this technique is more favorable with regards to angiogenesis process intensity, along with all its consequences
and implications. 相似文献