全文获取类型
收费全文 | 6117篇 |
免费 | 334篇 |
国内免费 | 32篇 |
专业分类
耳鼻咽喉 | 143篇 |
儿科学 | 529篇 |
妇产科学 | 100篇 |
基础医学 | 518篇 |
口腔科学 | 255篇 |
临床医学 | 409篇 |
内科学 | 1630篇 |
皮肤病学 | 98篇 |
神经病学 | 358篇 |
特种医学 | 168篇 |
外科学 | 858篇 |
综合类 | 90篇 |
一般理论 | 1篇 |
预防医学 | 254篇 |
眼科学 | 167篇 |
药学 | 372篇 |
中国医学 | 21篇 |
肿瘤学 | 512篇 |
出版年
2023年 | 51篇 |
2022年 | 118篇 |
2021年 | 231篇 |
2020年 | 135篇 |
2019年 | 200篇 |
2018年 | 261篇 |
2017年 | 155篇 |
2016年 | 213篇 |
2015年 | 190篇 |
2014年 | 270篇 |
2013年 | 329篇 |
2012年 | 478篇 |
2011年 | 468篇 |
2010年 | 280篇 |
2009年 | 222篇 |
2008年 | 353篇 |
2007年 | 374篇 |
2006年 | 345篇 |
2005年 | 280篇 |
2004年 | 272篇 |
2003年 | 221篇 |
2002年 | 190篇 |
2001年 | 75篇 |
2000年 | 64篇 |
1999年 | 67篇 |
1998年 | 30篇 |
1997年 | 29篇 |
1996年 | 23篇 |
1995年 | 20篇 |
1994年 | 20篇 |
1993年 | 15篇 |
1992年 | 52篇 |
1991年 | 38篇 |
1990年 | 45篇 |
1989年 | 38篇 |
1988年 | 28篇 |
1987年 | 23篇 |
1986年 | 27篇 |
1985年 | 23篇 |
1984年 | 14篇 |
1983年 | 19篇 |
1982年 | 17篇 |
1981年 | 17篇 |
1980年 | 13篇 |
1978年 | 14篇 |
1977年 | 17篇 |
1976年 | 13篇 |
1974年 | 11篇 |
1973年 | 17篇 |
1972年 | 17篇 |
排序方式: 共有6483条查询结果,搜索用时 15 毫秒
1.
Indian Journal of Pediatrics - 相似文献
2.
Background
Despite significant pain relief following total hip arthroplasty (THA) in patients with ankylosing spondylitis, a small subset of patients presenting with extra-articular extension contracture of hips remains unsatisfied.Methods
We retrospectively evaluated the patients with ankylosing spondylitis who underwent simultaneous bilateral THA and had extensor tightness of both hips preoperatively. They were managed with modified Z-plasty of iliotibial band. Patients with windswept deformity, commonly seen in bilateral hip arthritis caused by ankylosing spondylitis, were excluded.Results
Between July 2011 and June 2015, out of 148 patients with bilateral hip involvement, 10 patients (20 hips) had extension contracture of both hips that was addressed during surgery. All patients were followed up for a minimum of 2 years. They could sit comfortably on a chair of height 18 inches with hips and knees flexed to at least 90°. The mean postoperative sum range of motion was 144.6° with an average hip flexion of 95° (range, 90°-105°). None of them had recurrence of extension contracture. There was significant improvement in range of motion and hence ambulation and function. No radiolucent lines exceeding 2 mm were seen in any of the zones around either of the components as evaluated in latest X-rays.Conclusion
Extension contracture of hip although rare is a noticeable problem and needs to be addressed during THA. Modified Z-plasty technique of iliotibial band is a reliable method in managing these patients. 相似文献3.
4.
5.
Guntur E Luis Chee-Khuen Yong Deepak A Singh S Sengupta David SK Choon 《Journal of orthopaedic surgery and research》2007,2(1):22-10
Background
Acromioclavicular injuries are common in sports medicine. Surgical intervention is generally advocated for chronic instability of Rockwood grade III and more severe injuries. Various methods of coracoclavicular ligament reconstruction and augmentation have been described. The objective of this study is to compare the biomechanical properties of a novel palmaris-longus tendon reconstruction with those of the native AC+CC ligaments, the modified Weaver-Dunn reconstruction, the ACJ capsuloligamentous complex repair, screw and clavicle hook plate augmentation. 相似文献6.
Deepak N Amarapurkar Nikhil D Patel Jignesh Jatania 《Indian journal of gastroenterology》2007,26(3):113-117
INTRODUCTION: The prevalence and clinical spectrum of mesenteric venous thrombosis (MVT) in India is largely unknown. METHODS: We retrospectively re-viewed the case records of patients with primary mesenteric venous thrombosis seen over a 10-year period and retrieved information on clinical picture, underlying hypercoagulable states and outcome. RESULTS: The 28 cases (mean age 41.2 [SD 10.2] years; 19 male) included 13 with acute MVT, 10 with subacute MVT and 5 with chronic MVT. Ten patients had past thromboembolic events (multiple events in five); four patients had isolated superior mesenteric vein involvement and 14 had multiple vessel involvement. Hypercoagulable state was identified in 17 patients, with multiple etiologies in 7 patients. Pre-operative diagnosis was made in all patients. Ten patients needed surgical management; the rest were managed medically initially, but 2 required surgery on follow up. Seven patients died during a follow up of up to 10 years, with in-hospital mortality during index admission in six. CONCLUSIONS: Most of the patients with MVT have multiple intra-abdominal vessel involvement and underlying hypercoagulable state. The policy of early treatment with anticoagulation in all and surgical treatment as per need, achieves low mortality. 相似文献
7.
Four-Year Follow-up on Endovascular Radiofrequency Obliteration of Great Saphenous Reflux 总被引:4,自引:0,他引:4
Merchant Robert F. MD Pichot Olivier MD † Myers Kenneth A. MD ‡ 《Dermatologic surgery》2005,31(2):129-134
BACKGROUND: Endovascular radiofrequency obliteration has been used since 1998 as an alternative to conventional vein stripping surgery for elimination of saphenous vein insufficiency. OBJECTIVE: To demonstrate the long-term efficacy of this treatment modality. METHODS: Data were prospectively collected in a multicenter ongoing registry. Only great saphenous vein above-knee treatments were included in this study. Eight hundred ninety patients (1,078 limbs) were treated prior to November 2003 at 32 centers. Clinical and duplex ultrasound follow-up was performed at 1 week, 6 months, and 1, 2, 3, and 4 years. RESULTS: Among 1,078 limbs treated, 858 were available for follow-up within 1 week, 446 at 6 months, 384 at 1 year, 210 at 2 years, 114 at 3 years, and 98 at 4 years. The vein occlusion rates were 91.0%, 88.8%, 86.2%, 84.2%, and 88.8%, respectively; the reflux-free rates were 91.0%, 89.3%, 86.2%, 86.0%, and 85.7%, respectively; and the varicose vein recurrence rates were 7.2%, 13.5%, 17.1%, 14.0%, and 21.4%, respectively, at each follow-up time point at 6 months, and 1, 2, 3, and 4 years. Patient symptom improvement persisted over 4 years. CONCLUSIONS: Endovascular temperature-controlled radiofrequency obliteration of saphenous vein reflux exhibits an enduring treatment efficacy clinically, anatomically, and hemodynamically up to 4 years following treatment. 相似文献
8.
J T Muldoon L A Wintermeyer J A Eure L Fuortes J A Merchant S F Van Lier T B Richards 《American journal of public health》1987,77(8):1006-1008
Health department epidemiologists in 50 states, New York City, and the District of Columbia were surveyed in 1985 about seven potential data sources for occupational disease surveillance. Reported sources of occupational disease data were: automated workers' compensation claims (63 per cent of the 52 respondents); provider reports (62 per cent); death certificates with occupation or industry (60 per cent); cancer registries with occupational histories (35 per cent); birth certificates with parent's occupation (27 per cent); non-cancer disease registries (13 per cent); and hospital or insurance records (8 per cent). 相似文献
9.
Pratipal Singh Vivek Vijjan Manu Gupta Deepak Dubey Aneesh Srivastava 《International journal of urology》2007,14(6):558-560
Congenital thoracic ectopic kidney is a very rare developmental anomaly and the rarest form of all ectopic kidneys. It is usually asymptomatic and discovered incidentally on routine chest radiography. Herein we reported the first case of staghorn stone in a thoracic kidney managed successfully by percutaneous nephrolithotomy. 相似文献
10.