全文获取类型
收费全文 | 21922篇 |
免费 | 1167篇 |
国内免费 | 125篇 |
专业分类
耳鼻咽喉 | 222篇 |
儿科学 | 560篇 |
妇产科学 | 601篇 |
基础医学 | 3274篇 |
口腔科学 | 365篇 |
临床医学 | 2045篇 |
内科学 | 4901篇 |
皮肤病学 | 699篇 |
神经病学 | 2351篇 |
特种医学 | 1273篇 |
外科学 | 3169篇 |
综合类 | 137篇 |
一般理论 | 11篇 |
预防医学 | 867篇 |
眼科学 | 394篇 |
药学 | 1107篇 |
中国医学 | 7篇 |
肿瘤学 | 1231篇 |
出版年
2023年 | 161篇 |
2022年 | 221篇 |
2021年 | 497篇 |
2020年 | 303篇 |
2019年 | 409篇 |
2018年 | 459篇 |
2017年 | 333篇 |
2016年 | 472篇 |
2015年 | 483篇 |
2014年 | 690篇 |
2013年 | 954篇 |
2012年 | 1460篇 |
2011年 | 1483篇 |
2010年 | 931篇 |
2009年 | 873篇 |
2008年 | 1362篇 |
2007年 | 1341篇 |
2006年 | 1326篇 |
2005年 | 1327篇 |
2004年 | 1224篇 |
2003年 | 1088篇 |
2002年 | 1014篇 |
2001年 | 313篇 |
2000年 | 272篇 |
1999年 | 288篇 |
1998年 | 234篇 |
1997年 | 181篇 |
1996年 | 122篇 |
1995年 | 123篇 |
1994年 | 95篇 |
1993年 | 88篇 |
1992年 | 115篇 |
1991年 | 110篇 |
1990年 | 108篇 |
1989年 | 94篇 |
1988年 | 93篇 |
1987年 | 100篇 |
1986年 | 83篇 |
1985年 | 91篇 |
1984年 | 78篇 |
1983年 | 59篇 |
1982年 | 45篇 |
1981年 | 45篇 |
1979年 | 71篇 |
1977年 | 46篇 |
1975年 | 57篇 |
1974年 | 47篇 |
1930年 | 53篇 |
1928年 | 54篇 |
1913年 | 48篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Kamolz Lars-Peter Kotzbeck Petra Schintler Michael Spendel Stephan 《European Surgery》2022,54(3):163-169
European Surgery - Large skin defects caused by trauma (e.g., burns) or due to other reasons (e.g., tumor-related skin resections) require sufficient skin replacement. The constant improvement of... 相似文献
2.
Stephan Koter Tina U. Cohnert Korbinian B. Hindermayr Jörg Lindenmann Maximilian Brückner Wolfgang K. Oswald Georg Werkgartner Doris Wagner 《Journal of vascular surgery》2019,69(4):1227-1232
Objective
Low psoas muscle area is shown to be an indicator for worse postoperative outcome in patients undergoing vascular surgical. Additionally, it has been associated with longer durations of hospital stay in patients with cancer who undergo surgery and subsequently greater health care costs in Europe and the United States. We sought to evaluate this effect on hospital expenditure for patients undergoing vascular repair in a health care system with universal access.Methods
Skeletal muscle mass was assessed on preoperative abdominal computed tomography scans of patients undergoing open aortic aneurysm repair in a retrospective fashion. The skeletal muscle index (SMI) was used to define low muscle mass. Health care costs were obtained for all patients and the relationship between a low SMI and higher costs was explored using linear regression and cross-sectional analysis.Results
We included 156 patients (81.5% male) with a median age of 72 years undergoing elective surgery for infrarenal abdominal aortic aneurysm in this analysis. The median SMI for patients with low skeletal muscle mass was 53.21 cm2/kg and for patients without, 70.07 cm2/kg. Hospital duration of stay was 2 days longer in patients with low skeletal muscle mass as compared with patients with normal (14 days vs 11 days; P = .001), as was duration of intensive care stay (3 days vs 1 day; P = .01). The median overall hospital costs were €10,460 higher for patients with a low SMI as compared with patients with a normal physical constitution (€53,739 [interquartile range, €45,007-€62,471] vs €43,279 [interquartile range, €39,509-€47,049]; P = .001). After confounder adjustment, a low SMI was associated with a 14.68% cost increase in overall hospital costs, for a cost increase of €6521.Conclusions
Low skeletal muscle mass is independently associated with higher hospital as well as intensive care costs in patients undergoing elective aortic aneurysm repair. Strategies to reduce this risk factor are warranted for these patients. 相似文献3.
4.
Stephan Kloos 《Medical anthropology》2020,39(2):167-181
ABSTRACTIn this article I explore, for the first time, the relationship between Sowa Rigpa (Tibetan medicine) and global health, tracing “the global” in ethical discourses and pharmaceutical innovation practices of Tibetan medical practitioners. I argue that Sowa Rigpa’s engagement with the world and its global health activities outside China can be understood as a form of “humanitarianism from below,” while its industrialization in China aligns with global health in different ways. In providing new insights into recent developments of Sowa Rigpa, I aim to decenter the notion of humanitarianism and contribute to a broader understanding of global health. 相似文献
5.
best practice onkologie - 相似文献
6.
Marie Warrer Petersen Tine Sylvest Meyhoff Marie Helleberg Maj-Brit Nørregaard Kjær Anders Granholm Carl Johan Steensen Hjortsø Thomas Steen Jensen Morten Hylander Møller Peter Buhl Hjortrup Mik Wetterslev Gitte Kingo Vesterlund Lene Russell Vibeke Lind Jørgensen Klaus Tjelle Thomas Benfield Charlotte Suppli Ulrik Anne Sofie Andreasen Thomas Mohr Morten H. Bestle Lone Musaeus Poulsen Mette Friberg Hitz Thomas Hildebrandt Lene Surland Knudsen Anders Møller Christoffer Grant Sølling Anne Craveiro Brøchner Bodil Steen Rasmussen Henrik Nielsen Steffen Christensen Thomas Strøm Maria Cronhjort Rebecka Rubenson Wahlin Stephan Jakob Luca Cioccari Balasubramanian Venkatesh Naomi Hammond Vivekanand Jha Sheila Nainan Myatra Christian Gluud Theis Lange Anders Perner 《Acta anaesthesiologica Scandinavica》2020,64(9):1365-1375
Introduction
Severe acute respiratory syndrome coronavirus-2 has caused a pandemic of coronavirus disease (COVID-19) with many patients developing hypoxic respiratory failure. Corticosteroids reduce the time on mechanical ventilation, length of stay in the intensive care unit and potentially also mortality in similar patient populations. However, corticosteroids have undesirable effects, including longer time to viral clearance. Clinical equipoise on the use of corticosteroids for COVID-19 exists.Methods
The COVID STEROID trial is an international, randomised, stratified, blinded clinical trial. We will allocate 1000 adult patients with COVID-19 receiving ≥10 L/min of oxygen or on mechanical ventilation to intravenous hydrocortisone 200 mg daily vs placebo (0.9% saline) for 7 days. The primary outcome is days alive without life support (ie mechanical ventilation, circulatory support, and renal replacement therapy) at day 28. Secondary outcomes are serious adverse reactions at day 14; days alive without life support at day 90; days alive and out of hospital at day 90; all-cause mortality at day 28, day 90, and 1 year; and health-related quality of life at 1 year. We will conduct the statistical analyses according to this protocol, including interim analyses for every 250 patients followed for 28 days. The primary outcome will be compared using the Kryger Jensen and Lange test in the intention to treat population and reported as differences in means and medians with 95% confidence intervals.Discussion
The COVID STEROID trial will provide important evidence to guide the use of corticosteroids in COVID-19 and severe hypoxia.7.
8.
9.
10.
Ludwig Labler Marius Keel Otmar Trentz Michael Heinzelmann 《European spine journal》2006,15(9):1388-1396
The use of vacuum assisted closure (V.A.C.) therapy in postoperative infections after dorsal spinal surgery was studied retrospectively. Successful treatment was defined as a stable healed wound that showed no signs of acute or chronic infection. The treatment of the infected back wounds consisted of repeated debridement, irrigation and open wound treatment with temporary closure by V.A.C. The instrumentation was exchanged or removed if necessary. Fifteen patients with deep subfascial infections after posterior spinal surgery were treated. The implants were exchanged in seven cases, removed completely in five cases and left without changing in one case. In two cases spinal surgery consisted of laminectomy without instrumentation. In two cases only the wound defects were closed by muscle flap, the remaining ones were closed by delayed suturing. Antibiotic treatment was necessary in all cases. Follow up was possible in 14 patients. One patient showed a new infection after treatment. The study illustrates the usefulness of V.A.C. therapy as a new alternative management for wound conditioning of complex back wounds after deep subfascial infection. 相似文献