全文获取类型
收费全文 | 3255篇 |
免费 | 204篇 |
国内免费 | 17篇 |
专业分类
耳鼻咽喉 | 52篇 |
儿科学 | 83篇 |
妇产科学 | 85篇 |
基础医学 | 420篇 |
口腔科学 | 60篇 |
临床医学 | 213篇 |
内科学 | 740篇 |
皮肤病学 | 180篇 |
神经病学 | 284篇 |
特种医学 | 134篇 |
外科学 | 383篇 |
综合类 | 8篇 |
一般理论 | 3篇 |
预防医学 | 177篇 |
眼科学 | 45篇 |
药学 | 309篇 |
中国医学 | 8篇 |
肿瘤学 | 292篇 |
出版年
2023年 | 38篇 |
2022年 | 45篇 |
2021年 | 107篇 |
2020年 | 54篇 |
2019年 | 80篇 |
2018年 | 74篇 |
2017年 | 80篇 |
2016年 | 97篇 |
2015年 | 91篇 |
2014年 | 124篇 |
2013年 | 147篇 |
2012年 | 223篇 |
2011年 | 248篇 |
2010年 | 130篇 |
2009年 | 131篇 |
2008年 | 207篇 |
2007年 | 219篇 |
2006年 | 211篇 |
2005年 | 182篇 |
2004年 | 180篇 |
2003年 | 170篇 |
2002年 | 149篇 |
2001年 | 53篇 |
2000年 | 41篇 |
1999年 | 44篇 |
1998年 | 24篇 |
1997年 | 21篇 |
1996年 | 19篇 |
1995年 | 21篇 |
1994年 | 16篇 |
1993年 | 7篇 |
1992年 | 29篇 |
1991年 | 26篇 |
1990年 | 16篇 |
1989年 | 18篇 |
1988年 | 20篇 |
1987年 | 20篇 |
1986年 | 11篇 |
1985年 | 12篇 |
1984年 | 12篇 |
1983年 | 5篇 |
1980年 | 6篇 |
1979年 | 7篇 |
1976年 | 6篇 |
1975年 | 4篇 |
1974年 | 7篇 |
1972年 | 4篇 |
1970年 | 4篇 |
1969年 | 4篇 |
1966年 | 5篇 |
排序方式: 共有3476条查询结果,搜索用时 15 毫秒
51.
52.
Effectiveness of electric toothbrushing in patients with neuromuscular disability: A randomized observer‐blind crossover trial
下载免费PDF全文
![点击此处可从《Special care in dentistry》网站下载免费的PDF全文](/ch/ext_images/free.gif)
53.
Hiroyuki MATSUMOTO Rie YAKO Osamu MASUO Katsuhisa HIRAYAMA Yuji UEMATSU Naoyuki NAKAO 《Neurologia medico-chirurgica》2014,54(2):139-144
We report a patient''s case of slow progressive in-stent restenosis 10 years after bare-metal stent implantation to his carotid artery. We treated the patient with an additional stent placement under a distal filter protection device. Optical coherence tomographic assessment and plaque histology during the carotid artery stenting (CAS) revealed atheromatous change at in-stent neointima, which contained lipid-rich plaque and calcification deposits. These findings suggest that in-stent neoatherosclerosis may play an important role in the pathogenesis of very late stent restenosis after CAS. 相似文献
54.
Hideaki Shigematsu Takatoshi Sorimachi Rie Aoki Kittipong Srivatanakul Shinri Oda 《Neurological research》2013,35(7):600-605
Objective: Numerous studies have identified different predictors for secondary hydrocephalus after aneurysmal subarachnoid hemorrhage (SAH), although predictors regarding timing of the shunt operation have never been reported. Predictors for an early shunt, which was defined as a shunt operation performed ≤30 days after SAH onset, and for a late shunt, performed at >40 days, were investigated.Methods: A total of 735 consecutive SAH patients admitted to our hospital between 2003 and 2014 who underwent surgery for ruptured aneurysms within five days of onset were retrospectively assessed.Results: Secondary hydrocephalus developed in 225 patients, including 70 with an early shunt and 96 with a late shunt. Multivariate analysis showed that predictors for secondary hydrocephalus were age ≥70 years, World Federation of Neurosurgical Society (WFNS) grade IV-V, Fisher grade 3–4, intraventricular hemorrhage, anterior cerebral artery aneurysms, and external drainage for acute hydrocephalus (p < 0.05). In the early and late shunt groups, multivariate analysis indicated that early shunt was significantly associated with coil embolization, and late shunt was correlated with middle cerebral artery aneurysms and cerebral infarction due to vasospasm (p < 0.05).Discussion: The difference in the predictors between the early and late shunts implied that the mechanisms of secondary hydrocephalus differed between the early and late shunt groups. Knowledge of the associated risk factors might help to predict the timing of the shunt operation for early rehabilitation planning in the future. 相似文献
55.
56.
Kentaro Nakai Kentaro Watanabe Shuhei Watanabe Rie Awata Keiji Kono 《Clinical and experimental hypertension (New York, N.Y. : 1993)》2016,38(5):476-481
Background: Hypertension is a crucial risk factor for cardiovascular death and loss of residual kidney function. Absence of the nocturnal decline in blood pressure (BP) predicts cardiovascular events and poor prognosis. However, characteristics of hypertension in moderate-to-severe chronic kidney disease (CKD) have not been fully evaluated. We aimed to assess the circadian variation of BP and kidney survival in CKD patients. Methods: Patients who were examined by 24-h ambulatory BP monitoring (ABPM) and estimated glomerular filtration rate (eGFR), <45 ml/min/1.73 m2, were enrolled in the study. The impacts of BP circadian rhythm and brain natriuretic peptide (BNP) on kidney survival were evaluated. Results: A total of 124 patients were enrolled. The average age was 64 ± 14 years, 57% were male, and 43% had diabetes. Forty-five percent of patients had a non-dipper pattern, 35% had a riser pattern, 19% had a dipper pattern, and 1% had an extreme-dipper pattern. The prevalence of diabetes and plasma BNP levels was higher and eGFR was lower in the riser-pattern group than in the non-riser-pattern group. Kidney survival rates were significantly worse in the riser-pattern group than in the non-riser-pattern group (p < 0.05). Moreover, among riser and non-riser pattern groups divided by BNP levels, the riser group with higher BNP level showed the worst kidney survival (p < 0.05). Conclusion: The riser pattern is frequently associated with several conditions at higher risk for kidney survival. Patients with a rising pattern and higher BNP levels have a worse kidney prognosis. 相似文献
57.
58.
59.
Takenaka R Kawahara Y Okada H Tsuzuki T Yagi S Kato J Ohara N Yoshino T Imagawa A Fujiki S Takata R Nakagawa M Mizuno M Inaba T Toyokawa T Sakaguchi K 《Gastrointestinal endoscopy》2008,67(2):359-363
BACKGROUND: Endoscopic submucosal dissection (ESD) of early gastric cancer is less invasive than surgical resection, and if technically feasible, it may result in less long-term morbidity than does incisional surgery. However, ESD is technically difficult in patients who have had a previous distal gastrectomy. OBJECTIVE: Our purpose was to retrospectively assess the results of ESD of early gastric cancer in the remnant stomach. DESIGN: Case series. SETTING AND PATIENTS: A total of 31 lesions in 30 patients with early remnant gastric cancer were treated with ESD at Okayama University Hospital, Tsuyama Central Hospital, Hiroshima City Hospital, Kagawa Prefectural Central Hospital, and Mitoyo General Hospital from March 2001 to January 2007. INTERVENTION: ESD. MAIN OUTCOME MEASUREMENTS: En bloc resection rate, complete resection rate, operation time, and complications. RESULTS: En bloc resection and complete resection were achieved in 30 (97%) and in 23 (74%) lesions, respectively. The median operation time required for ESD in the remnant stomach was 113 minutes (range 45-450 minutes). Perforation occurred in 4 (13%). The incidence of delayed bleeding requiring blood transfusion was 0%. LIMITATION: Short duration of follow-up. CONCLUSIONS: ESD is feasible in the remnant stomach but has a relatively high complication rate and should only be performed by experienced endoscopists. 相似文献
60.
Stefan Borgmann Yvonne Pfeifer Laura Becker Beate Rieß Rabea Siegmund Ulrich Sagel 《Infection》2018,46(1):103-112